Foreword This manual contains complete rebuild specifications and information for the N14 model engines, and all associated components manufactured by Cummins Engine Company, Inc. A listing of accessory and component suppliers’ addresses and telephone numbers is located in Section C. Suppliers can be contacted directly for any information not covered in this manual. The repair procedures in this manual are based on the engine being installed on an approved engine stand.
TABLE OF CONTENTS Page Introduction................................................................................................................................................ i-1 Group 0 - Engine Disassembly and Assembly ........................................................................................... 0-1 Group 1 - Cylinder Block........................................................................................................................... 1-1 Group 2 - Cylinder Head ......
Cummins 22-Group System Exploded Diagram
Section I - Introduction N14 Page i-1 Section I - Introduction Section Contents Page Engine Diagrams .............................................................................................................................................. i-13 Engine Identification ........................................................................................................................................ i-12 General Cleaning Instructions....................................................................
Manual Organization Page i-2 Section I - Introduction N14 Manual Organization All references to engine components in this manual are divided into 22 specific groups. The organization is consistent with the service bulletins, service parts topics, and the parts catalogs for your convenience in updating your copy of the shop manual. Table of Contents The Table of Contents in the front of the manual contains a quick page reference for each group number.
Section I - Introduction N14 General Repair Instructions Page i-3 General Repair Instructions This engine incorporates the latest diesel technology; yet, it is designed to be repaired using normal repair practices performed to quality standards. • Cummins Engine Company, Inc. does not recommend or authorize any modifications or repairs to engines or components except for those detailed in Cummins Service Information.
General Safety Instructions Page i-4 Section I - Introduction N14 General Safety Instructions Important Safety Notice WARNING Read and understand all of the safety precautions and warnings before performing any repair. This list contains the general safety precautions that must be followed to provide personal safety. Special safety precautions are included in the procedures when they apply. • Make sure the work area surrounding the product is safe. Be aware of hazardous conditions that can exist.
Section I - Introduction N14 Symbols Used in this Manual Page i-5 Symbols Used in this Manual The following group of symbols has been used in this manual to help communicate the intent of the instructions. When one of the symbols appears, it conveys the meaning defined below. WARNING - Serious personal injury or extensive property damage can result if the warning instructions are not followed.
Simbolos Usados En Este Manual Page i-6 Section I - Introduction N14 Simbolos Usados En Este Manual Los símbolos siguientes son usados en este manual para clarificar el proceso de las instrucciones. Cuando aparece uno de estos símbolos, su significado se especifica en la parte inferior. ADVERTENCIA - Serios daños personales o daño a la propiedad puede resultar si las instrucciones de Advertencia no se consideran.
Section I - Introduction N14 Symboles Utilises Dans Ce Manuel Page i-7 Symboles Utilises Dans Ce Manuel Les symboles suivants sont utilisés dans ce manuel pour aider à communiquer le but des instructions. Quand l’un de ces symboles apparaît, il évoque le sens défini ci-dessous: AVERTISSEMENT - De graves lésions corporelles ou des dommages matériels considérables peuvent survenir si les instructions données sous les rubriques ″Avertissement″ ne sont pas suivies.
Symbole Page i-8 Section I - Introduction N14 Symbole In diesem Handbuch werden die folgenden Symbole verwendet, die wesentliche Funktionen hervorheben. Die Symbole haben folgende Bedeutung: WARNUNG - Wird die Warnung nicht beachtet, dann besteht erhöhte Unfall- und Beschädigungsgefahr. VORSICHT - Werden die Vorsichtsmassnahmen nicht beachtet, dann besteht Unfall- und Beschädigungsgefahr. AUSBAU bzw. ZERLEGEN. EINBAU bzw. ZUSAMMENBAU. INSPEKTION erforderlich. Teil oder Baugruppe REINIGEN.
Section I - Introduction N14 Illustrations Page i-9 Illustrations The illustrations used in this manual are intended to give an example of how to perform the action or the repair being described. Many of the illustrations are common and will not look exactly like the engine or the parts used in your application. Most of the illustrations contain symbols to indicate an action required or to indicate an acceptable (OK) or unacceptable (not OK) condition.
Glossary Of Terms Page i-10 Section I - Introduction N14 Glossary Of Terms AFC: Air Fuel Control; a device in the PT fuel pump that limits the fuel delivery until there is sufficient intake manifold pressure to allow for complete combustion. ATDC: After Top Dead Center; refers to the position of the piston or the crankshaft rod journal. The piston is moving downward on the power stroke and intake stroke. BDC: Bottom Dead Center; refers to the position of the piston or the crankshaft rod journal.
Section I - Introduction N14 Glossary Of Terms Page i-11 Magnetic Particle Inspection: A method of checking for cracks in either steel or iron parts. This method requires a Magnaflux machine, or an equivalent machine that imparts a magnetic field on the part being checked. Mallet: A hand tool consisting of a soft head, either wood, plastic, lead, brass, or rawhide, on a handle. MAX: Maximum allowed MIN: Minimum allowed No.: Number O.D.
Engine Identification Page i-12 Section I - Introduction N14 Engine Identification The engine dataplate provides the model identification and other important information about the engine. Have the following engine data available when communicating with a Cummins Authorized Repair Location. The information on the dataplate is mandatory when sourcing service parts: 1. Engine Serial Number (E.S.N.) 2. Control Parts List (CPL) 3. Model 4.
Section I - Introduction N14 Engine Diagrams Page i-13 Engine Diagrams The following drawings contain information about engine components, filter locations, drain points, and access locations for instrumentation and engine controls. The information and configuration of components shown in these drawings are of a general nature. Some component locations will vary depending on applications and installations.
Engine Diagrams Page i-14 Section I - Introduction N14
Section I - Introduction N14 Engine Diagrams Page i-15
General Cleaning Instructions Page i-16 Section I - Introduction N14 General Cleaning Instructions Solvent and Acid Cleaning Several solvent and acid-type cleaners can be used to clean the engine parts. Cummins Engine Company, Inc. does not recommend any specific cleaners. Always follow the cleaner manufacturer’s instructions. Experience has shown that the best results can be obtained using a cleaner that can be heated to 90 to 95 degrees Celsius [180 to 200 degrees Fahrenheit].
Engine Disassembly and Assembly N14 Page 0-1 Section 0 - Engine Disassembly and Assembly - Group 00 Section Contents Page Accessory Drive - Installation ........................................................................................................................ 0-89 Accessory Drive - Removal ............................................................................................................................ 0-31 Accessory Drive Pulley - Installation .....................................
Page 0-2 Engine Disassembly and Assembly N14 Page CELECT™ Lubricating Oil Pressure Sensor - Removal .................................................................................. 0-29 CELECT™ Sensor Harness - Installation........................................................................................................ 0-127 CELECT™ Sensor Harness - Removal ............................................................................................................ 0-27 Coolant - Drainage.........
Engine Disassembly and Assembly N14 Page 0-3 Page Fan and Fan Spacer - Removal ...................................................................................................................... 0-13 Fan Belts - Installation and Adjustment........................................................................................................ 0-137 Fan Belts - Removal .......................................................................................................................................
Page 0-4 Engine Disassembly and Assembly N14 Page Lubricating Oil Transfer Tube - Installation.................................................................................................. 0-122 Lubricating Oil Transfer Tube - Removal ...................................................................................................... 0-31 Piston and Connecting Rod Assemblies - Assembly and Installation ..........................................................
Engine Disassembly and Assembly N14 Engine Disassembly and Assembly - Service Tools Page 0-5 Engine Disassembly and Assembly - Service Tools The following special tools are recommended to perform procedures in section 1. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No.
Engine Disassembly and Assembly - Service Tools Page 0-6 Tool No. Engine Disassembly and Assembly N14 Tool Description Main Bearing Cap Puller Remove main bearings caps. ST-1178 Top Plate ST-1259-1 Included in oil seal puller/installer, Part No. ST-1259. Use to pull or install the front crankshaft oil seal. Belt Tension Gauge Measure drive belt tension. ST-1293 Dial Gauge Attachment ST-1325 Attaches to crankshaft to provide measuring of flywheel housing runout with a dial indicator.
Engine Disassembly and Assembly N14 Tool No. Engine Disassembly and Assembly - Service Tools Page 0-7 Tool Description Connecting Rod Guide Pins 3375601 Guide connecting rods over crankshaft during removal or installation of connecting rods. Nylon Lifting Sling 3375957 Aid in removal and installation of crankshaft, flywheel, and other heavy components. Dial Indicator and Sleeve Assembly 3376050 Use with dial gauge attachment, Part No. ST-1325, to measure flywheel and flywheel housing runout.
Engine Disassembly and Assembly N14 Engine Disassembly and Assembly - General information Page 0-9 Engine Disassembly and Assembly - General information These procedures apply to all N14 engines. The differences between engine models due to the application, the optional equipment on an engine, and the year an engine was built are included in the instructions. Omit the steps that do not apply to the engine being rebuilt. 1.
Engine - Preparation for Cleaning Page 0-10 Engine Disassembly (00-01) N14 Engine Disassembly (00-01) Engine - Preparation for Cleaning Warning: The engine lifting equipment must be designed to safely lift the engine and the transmission as an assembly. The dry weight of the standard engine with accessories is 1256 kg [2770 lbs]. Refer to the equipment manufacturer’s specifications for the transmission weight. Use a correctly rated hoist, and attach engine lifting fixture, Part No. ST-125 or Part No.
Engine Disassembly (00-01) N14 NOTE: The maximum oil pan capacity is 34 liters [9.0 U.S. gallons]. Remove the drain plug and the copper washer. Check the copper washer for wear. Drain the oil. If the drain plug is installed again, tighten the plug to the specified torque. Torque Value: 136 N•m [100 ft-lb] Coolant - Drainage Remove the plugs from the engine and open the cylinder block draincock and the oil cooler draincock. Use a suitable container to catch the coolant as it is drained.
Crankcase Breather - Removal Page 0-12 Engine Disassembly (00-01) N14 Crankcase Breather - Removal Loosen the hose clamp at the breather vent tube. Remove the tube support bracket capscrew and the bracket. Remove the tube and the hose from the engine. Turbocharger - Removal Remove the oil supply and the oil drain tubes from the turbocharger. Remove the four turbocharger mounting nuts. Remove the turbocharger and discard the gasket.
Engine Disassembly (00-01) N14 Exhaust Manifold - Removal NOTE: Two dowels are used in each cylinder head to align the exhaust manifold assembly. Remove two capscrews, and install two guide studs. Warning: Because this assembly weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the exhaust manifold assembly to avoid personal injury. Remove the remaining ten capscrews, the exhaust manifold assembly, and the manifold gaskets.
Alternator - Removal Page 0-14 Engine Disassembly (00-01) N14 Alternator - Removal Remove the adjusting link capscrew and the adjusting link. Remove the alternator to alternator support bracket, nut, washer, capscrew, and the alternator. Alternator Mounting Bracket - Removal Remove the three alternator mounting bracket capscrews and the mounting bracket.
Engine Disassembly (00-01) N14 Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the oil cooler assembly to avoid personal injury. Remove the remaining five capscrews from the oil cooler support, and remove the cooler assembly. Coolant Inlet Transfer Connection Removal Loosen four mounting capscrews, and remove the coolant inlet transfer connection from the water pump. Dipstick Tube and Housing - Removal Remove the four capscrews and the housing.
Water Header Covers - Removal Page 0-16 Engine Disassembly (00-01) N14 Water Header Covers - Removal Remove the six capscrews from each of the two water header covers. Remove the covers, and discard the gaskets. Engine - Installation on the Rebuild Stand NOTE: Use engine rebuild stand, Part No. 3375194, and the adapter plate, Part No. 3375013. Use six 5/8-11 X 1 3/4-inch grade 5 capscrews to install the adapter plate to the rebuild stand.
Engine Disassembly (00-01) N14 Install the mounting plate adapter on the rear water header. Use five 1/4-20 X 1 1/4-inch capscrews to mount the adapter. Tighten the capscrews. Torque Value: 10 N•m [7 ft-lb] Install three 1/2-13 X 3 3/8-inch capscrews through the adapter plate as shown. Install the three adapter plate spacers over the capscrews. Use a lifting fixture, Part No. ST-125 or 3822512, to lift the engine. Align the exhaust side of the engine to the adapter plate of the rebuild stand.
Flywheel - Removal Page 0-18 Engine Disassembly (00-01) N14 Adjust the position of the engine so that the remaining mounting holes in the adapter plate (1) and (2) align with the capscrew holes in the cylinder block. Use your fingers to tighten the three 1/2-13 X 3 3/8-inch capscrews (1). Install four 3/8-16 X 3 3/8-inch capscrews in the location shown (2). Use your fingers to tighten the capscrews. Tighten all the adapter plate mounting capscrews in the sequence shown.
Engine Disassembly (00-01) N14 Determine the capscrew thread size, and install two ‘‘Thandles’’ in the flywheel at points (4) and (5). Remove the remaining four flywheel mounting capscrews. Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the flywheel to avoid personal injury. Tighten capscrews (1) and (2) in alternating sequence to loosen the flywheel.
Rear Cover - Removal Page 0-20 Engine Disassembly (00-01) N14 On wet-type flywheel housings, remove the o-ring from the rear cover and the 11 rectangular sealing rings from the flywheel housing. Rear Cover - Removal Remove the capscrews from the rear cover, and remove the cover from the crankshaft flange. Crankshaft Seal, Rear - Removal Remove the seal from the rear cover. Fan Belts - Removal Loosen the four capscrews which secure the fan hub to the bracket.
Engine Disassembly (00-01) N14 Fan Hub and Fan Hub Support Bracket - Removal Remove the four capscrews that attach the fan hub to the support bracket, and remove the fan hub assembly. Remove the four capscrews that attach the fan hub support (1) bracket to the cylinder block and the brace (2), and remove the fan hub support bracket. Remove the four capscrews that attach the front lifting bracket (3) to the rocker housing (4), and remove the brace (2) and the lifting bracket (3).
Thermostat Housing - Removal Page 0-22 Engine Disassembly (00-01) N14 Thermostat Housing - Removal Disconnect the air compressor coolant return line from the thermostat housing. Remove the four capscrews that attach the thermostat housing to the rocker housing. Remove the thermostat housing from the water transfer tube. Air Compressor Coolant Inlet and Outlet Tubes - Removal Remove the coolant tubes to the air compressor, the cylinder block, and the water pump.
Engine Disassembly (00-01) N14 Water Pump - Removal Remove the six mounting capscrews from the water pump. NOTE: The water pump must be removed carefully to prevent damage to the impeller. Remove the water pump from the engine. Remove the water pump out and in a downward direction to clear the dowel pin. This dowel pin, used only on N14 cylinder blocks, prevents the installation of earlier model water pumps which do not incorporate an internal oil cooler coolant return passage.
STC External Oil Plumbing - Removal Page 0-24 Engine Disassembly (00-01) N14 STC External Oil Plumbing - Removal Disconnect the external oil manifold supply line from the rear of the external oil manifold. Plug the supply line to avoid dirt contamination. Caution: Hold the oil manifold fitting hex with a backup wrench while removing the supply line to avoid damaging the manifold. Remove the three external oil manifold hold down capscrews. Remove the three mounting clips, capscrews, and spacers.
Engine Disassembly (00-01) N14 Remove the clamp, check valve, and oil supply hose from the engine. STC Oil Control Valve - Removal Remove the two capscrews attaching the STC oil control valve to the mounting plate. Remove the valve. Remove the two capscrews attaching the mounting plate to the cylinder block and remove the mounting plate. CELECT™ Actuator Harness - Removal Remove the actuator harness clamps from the support bracket.
CELECT™ Actuator Harness - Removal Page 0-26 Engine Disassembly (00-01) N14 Disconnect the Deutsch three pin connector that contains the vehicle key switch, fan clutch, and engine brake control wires from the three pin connector which is wired directly into the Deutsch nine pin connector on the sensor harness. Remove the actuator harness amp connector from the electronic control module (ECM).
Engine Disassembly (00-01) N14 CELECT™ Sensor Harness - Removal Remove the retaining clamps for the sensor harness from the support bracket and the engine block. Although the OEM harness is shown, this will be disconnected when the engine is out of chassis. Disconnect the sensor harness amp connector from the ECM. Remove the retaining clamp of the sensor harness from the rear of the engine block. Disconnect the sensor harness from the intake air temperature sensor and the intake manifold pressure sensor.
CELECT™ Electronic Control Module (ECM) - Removal Page 0-28 Engine Disassembly (00-01) N14 Remove the harness retaining capscrews and disconnect the harness from the following sensors: Oil pressure sensor Oil temperature sensor Ambient air pressure* Engine position sensor Engine coolant temperature sensor *Not used on all ratings. Remove the sensor harness from the engine. CELECT™ Electronic Control Module (ECM) - Removal Remove the six capscrews which hold the ECM to the cooling plate.
Engine Disassembly (00-01) N14 CELECT™ Lubricating Oil Pressure Sensor - Removal Remove the oil pressure signal line. Remove the sensor mounting capscrews. Remove the sensor from the engine. CELECT™ ECM Cooling Plate - Removal Remove the inlet and the outlet fuel hoses from the cooling plate. Remove the four cooling plate mounting capscrews. Do not lose any of the heat resistant grommets. The heat resistant grommets are on both sides of the cooling plate.
Air Compressor - Removal Page 0-30 Engine Disassembly (00-01) N14 STC Engines Remove the fuel tubing and AFC air signal line: Gear pump cooling drain (1) Fuel supply line (2) Fuel rail pressure line (3) AFC air signal line (4) Tachometer cable (if equipped) (5) Fuel pressure sensing line (to STC valve) (6) Throttle switch (if equipped) (not shown) Remove the four capscrews and the fuel pump. Remove the spider coupling.
Engine Disassembly (00-01) N14 Accessory Drive - Removal Caution: If the accessory drive dowel pin has been incorrectly installed in the accessory drive shaft, the dowel pin must be removed before attempting to remove the accessory drive to prevent damage to the accessory drive bushing. Remove the five capscrews and the accessory drive assembly. Fuel Tubing - Removal Remove the retaining clamps and the fuel rail supply tube from the engine. Remove the fuel return tube from the engine.
Lubricating Oil Pump Signal Line - Removal Page 0-32 Engine Disassembly (00-01) N14 Remove and discard the o-ring from the oil pan flange tube and the rectangular sealing ring from the lubricating oil pump mounting flange. Lubricating Oil Pump Signal Line Removal Remove the demand flow and cooling (DFC) signal line between the cylinder block main oil rifle and the lubricating oil pump. On STC engines, remove the DFC signal line between the viscosity sensor and the lubricating oil pump.
Engine Disassembly (00-01) N14 Remove the two mounting bracket capscrews from the pan rail. Remove the entire assembly from the engine. CELECT™ Boost Pressure Sensor Removal Remove the sensor mounting capscrews. Remove the sensor from the engine. CELECT™ Intake Air Temperature Sensor - Removal Remove the sensor from the engine. Intake Manifold - Removal Remove the four capscrews that attach the intake air connector to the intake manifold. Remove the nine capscrews, and remove the intake manifold.
Rocker Housing Covers - Removal Page 0-34 Engine Disassembly (00-01) N14 Rocker Housing Covers - Removal Remove the ten capscrews from each rocker lever cover. Remove the rocker lever covers. The rocker housing cover gaskets can be used again if they are not damaged. Caution: Do not clean reusable gaskets with any solvent or steam. Solvent and steam will damage the gasket material. Clean only with soap and water.
Engine Disassembly (00-01) N14 Valve Crossheads - Removal Remove the crossheads. Be sure to mark them appropriately so they can be installed in the same location and orientation during the installation procedure. NOTE: Excessive crosshead wear can result if the crossheads are not installed in their original locations. The larger hole on the underside of the crosshead must be oriented toward the exhaust side of the engine. Push Tubes - Removal Remove the push tubes.
Rocker Lever Housing - Removal Page 0-36 Engine Disassembly (00-01) N14 STC Engines Remove the injector hold down clamp capscrew and the clamp. Use injector puller, Part No. 3822697, to remove the STC injectors. Insert the threaded end of the puller into the tapped hole in the STC oil feed lock nut. Remove the internal oil tube and the rubber grommet which is located in the cylinder head. Rocker Lever Housing - Removal Remove the water manifold tube clamps. Use service tool, Part No.
Engine Disassembly (00-01) N14 Remove the rocker lever housings. Remove the gaskets. NOTE: On CELECT™ engines while handling the rocker lever housings, protect the wiring harness pass through connectors. Do not subject the pass through connectors to impact forces and do not rest the housing on the face with the pass through connectors. Fuel Crossovers - Removal Remove the four capscrews from each of the two fuel crossovers, and remove the fuel crossovers. Remove and discard the four o-rings.
Cam Follower Assemblies - Removal Page 0-38 Engine Disassembly (00-01) N14 Cam Follower Assemblies - Removal Remove the cam follower housing assemblies as follows: 1. Remove the six capscrews and studs from each cam follower housing. NOTE: Record the position of the studs prior to removal. 2. Remove the cam follower housings and gaskets. NOTE: To prevent increased wear, mark the cam follower housing assemblies as they are removed so they can be installed back in their original location on the block.
Engine Disassembly (00-01) N14 Lubricating Oil Pan - Removal Remove the oil pan mounting capscrews and the oil pan. Gear Cover - Removal Remove one capscrew on each side of the gear cover, and install a 7/16 - 20 X 4-inch guide stud in each location to support the cover during removal. Remove the remaining gear cover capscrews, and remove the gear cover. Crankshaft Seal, Front - Removal Remove the front crankshaft seal. Accessory Drive Seal - Removal Remove the accessory drive seal.
Piston and Connecting Rod Assemblies - Removal Page 0-40 Engine Disassembly (00-01) N14 Use one hand to slowly rotate and pull the camshaft from the cylinder block and the other hand to balance the camshaft as it is removed. Remove the camshaft thrust washer from the camshaft. Piston and Connecting Rod Assemblies - Removal Caution: Piston cooling nozzles must be removed prior to the removal of the piston and connecting rod assemblies.
Engine Disassembly (00-01) N14 Install two connecting rod guide pins, Part No. 3375601. Use a ‘‘T-handle’’ piston pusher to push the rod away from the crankshaft. NOTE: Push the rod away from the crankshaft, over the crankshaft rod journal, and push the rod until the piston rings are outside of the top of the cylinder liner. Remove the piston and rod assembly.
Cylinder Liners - Removal Page 0-42 Engine Disassembly (00-01) N14 Remove the upper rod bearing. Mark the cylinder number and the letter ‘‘U’’ in the flat surface of the bearing tang. Caution: Do not over expand the piston rings. Maximum gap at assembly is 1.63 inches. Use the piston ring expander, Part No. 3823871, to remove the piston rings. Put a tag on the rings, and record the cylinder number of the piston on the tag for future reference (if required).
Engine Disassembly (00-01) N14 Turn the puller jackscrew clockwise. Use both hands to remove the liners. Remove and discard the o-rings and the crevice seals. NOTE: Do not discard the sealing rings which are located under the cylinder liner flange. Sealing rings can be used again. Use a liquid metal marker to mark the cylinder number on each liner. If the sealing rings were removed, do the following: 1. Use a tag to mark the cylinder number. 2.
Crankshaft - Removal Page 0-44 Engine Disassembly (00-01) N14 Use a liquid metal marker to mark the cylinder number on each liner. If the sealing rings were removed, do the following: 1. Use a tag to mark the cylinder number. 2. Measure in several places and record the thickness of the sealing rings used in each cylinder. The thickness of the sealing ring is one factor in determining liner protrusion. This information must be known when the liners are installed in the engine.
Engine Disassembly (00-01) N14 Use main bearing cap puller, Part No. ST-1178, to remove the caps. The service tool must be centered on the main bearing cap. NOTE: Use a pencil or scribe to mark the bearing shells with the journal number from which they were removed if they are to be used again or if failure analysis is required. Mark the bearing on the back side or in the locating tang. Remove the lower main bearing shell from the crankshaft journal. Remove the dowel ring.
Cylinder Block - Removal from the Rebuild Stand Page 0-46 Engine Assembly (00-02) N14 Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the crankshaft to avoid personal injury. Use a hoist and a lifting sling to remove the crankshaft. Push the upper main bearing on the end that does not have the dowel ring groove.
Engine Assembly (00-02) N14 Cylinder Block - Installation on the Rebuild Stand Page 0-47 Install the mounting plate adapter on the rear water header if removed during the cleaning or inspection procedure. Use five 1/4-20 X 1 1/4-inch capscrews to mount the adapter. Torque Value: 10 N•m [7 ft-lb] Install three 1/2-13 X 3 3/8-inch capscrews through the adapter plate as shown. Install the three adapter plate spacers over the capscrews. Use a nylon lifting sling, Part No.
Crankshaft - Installation Page 0-48 Engine Assembly (00-02) N14 Adjust the position of the cylinder block so that the remaining mounting holes in the adapter plate (2) and (3) align with the capscrew holes in the cylinder block. Use your fingers to tighten the three 1/2-13 X 3 3/8-inch capscrews (2). Install four 3/8-16 X 3 3/8-inch capscrews in the location shown (3). Use your fingers to tighten the capscrews. Tighten all of the adapter plate mounting capscrews in the sequence shown.
Engine Assembly (00-02) N14 Caution: The upper main bearing shells have a groove and an oil hole to provide crankshaft lubrication. The lower main bearing shells do not. Both bearings are marked on the back to indicate the location and either standard (std.) or oversize (OS). The amount of OS is stamped on the back in U.S. customary inches. The groove for the No. 7 shell is not in the center of the shell. The wider part of the No. 7 shell must be installed toward the flywheel end of the cylinder block.
Crankshaft - Installation Page 0-50 Engine Assembly (00-02) N14 Align the ring dowel groove in the bearings with the counterbore in the cylinder block, and install the bearings. Both ends of the bearing will be approximately 1.50 mm [0.060-inch] below the main bearing cap mounting surface when installed correctly. Caution: Prevent dirt from mixing with the lubricant. Dirty lubricant will cause low mileage failures. Use clean LubriplateT 105 or its equivalent to lubricate the upper bearing shells.
Engine Assembly (00-02) N14 Use a lint free cloth to clean the thrust bearings, the main bearing shells, and the main bearing caps. NOTE: If used thrust bearings are to be installed, each must be installed in its original location in the engine. The bearing journal numbers must have been marked on the bearing during disassembly. Use clean LubriplateT 105 or its equivalent to lubricate the upper thrust bearings. Caution: The grooves must be toward the crankshaft.
Crankshaft - Installation Page 0-52 Engine Assembly (00-02) N14 Install the dowel ring in the dowel ring counterbore of the cylinder block. Install the lower main bearing shells as follows: Use clean LubriplateT 105 or its equivalent to lubricate the bearing shell to the crankshaft journal mating surface. Align the dowel ring groove in the bearing with the dowel ring. The dowel ring grooves (1) and (2) in the bearings must be engaged with the dowel ring (3).
Engine Assembly (00-02) N14 The end of the lower main bearing shell opposite the dowel ring must be engaged between the crankshaft and the cylinder block and be seated against the end of the upper bearing shell. NOTE: If installed correctly, the ends of the bearing shells (1) will meet approximately 1.50 mm [0.060-inch] below the cylinder block main bearing mounting surface. NOTE: If used thrust bearings are to be installed, each must be installed in its original location in the engine.
Crankshaft - Installation Page 0-54 Engine Assembly (00-02) N14 Caution: The main bearing caps are marked for position (1) on the camshaft side and the cylinder block identification (2) on the exhaust side. The cylinder block identification number (3) is stamped on the pan rail on the camshaft side of the block. Install the caps in the correct position with the position number to the camshaft side and its part number toward the rear of the engine. Install the main bearing caps.
Engine Assembly (00-02) N14 Tighten the main bearing capscrews to the following torque values: 1. Tighten to 122 N•m [90 ft-lb]. 2. Tighten to 230 N•m [170 ft-lb]. 3. Tighten to 346 N•m [255 ft-lb]. 4. Loosen completely. 5. Repeat steps 1 through 3. After tightening all the main bearing capscrews, use your hands to turn the crankshaft. If it does not turn freely, loosen the main bearing capscrews one cap at a time. This will help locate the bearing that is too tight.
Crankshaft - Installation Page 0-56 Engine Assembly (00-02) N14 Measure the end clearance of the crankshaft. Install a dial indicator to the rear face of the cylinder block. Put the tip of the gauge against the end of the crankshaft. Push the crankshaft toward the rear of the cylinder block. Set the dial indicator to ‘‘0.’’ Push the crankshaft toward the front of the cylinder block. If the end clearance is less than 0.10 mm [0.004-inch], do the following: Loosen the main bearing capscrews one turn.
Engine Assembly (00-02) N14 Measure the crankshaft end clearance. The end clearance specification for a new or reground crankshaft with new thrust bearings is 0.10 mm [0.004-inch] to 0.45 mm [0.018-inch]. NOTE: Crankshafts that have been reground on the thrust bearing surfaces are marked for oversize thrust bearings on the rear crankshaft counterweight. If the crankshaft counterweight is marked, check the thrust ring part number to make sure the correct thrust ring size is used. Example: F-.010 - Front 0.
Cylinder Liners - Installation Page 0-58 Engine Assembly (00-02) N14 Install the o-rings and the crevice seals as follows: 1. Install the crevice seal (1) in the top groove. 2. Install the black o-rings (2 and 3) in the center and the bottom grooves. Caution: Make sure that the o-rings (2 and 3) are not twisted. Twisted o-rings will not seal and will impact liner protrusion. Caution: Lower press fit (LPF) liners must not have sealant applied to the counterbore.
Engine Assembly (00-02) N14 Cylinder Liners - Installation Page 0-59 Liner installation tool, Part No. 3822953, is used to press the cylinder liner into the cylinder block. Protrusion can be checked while the liner is held down by the installation tool. Put a sealing ring into position on the counterbore ledge. Install the liner into the cylinder bore, slip through the sealing ring, and push down until it stops. Put the force plate (3) across the top of the liner with the step in the liner bore.
Cylinder Liners - Installation Page 0-60 Engine Assembly (00-02) N14 Use a depth gauge, Part No. 3823495, to measure the liner protrusion at four points 90 degrees apart. The protrusion must be from 0.10 mm to 0.18 mm [0.004-inch to 0.007-inch]. If correct liner protrusion is not attained, remove the liner from the cylinder block. Check the following for causes of incorrect liner protrusion: 1. Check for twisted liner o-rings. 2. Incorrect liner sealing ring thickness. 3.
Engine Assembly (00-02) N14 Piston and Connecting Rod Assemblies - Assembly and Installation Page 0-61 Piston and Connecting Rod Assemblies - Assembly and Installation Install a new snap ring in one of the snap ring grooves of the piston pin bore on each piston. Heat the pistons in boiling water for 15 minutes or in an oven for 30 minutes at 100° C [212° F]. Use clean 15W-40 oil to lubricate the connecting rod piston pin bore and the piston pin.
Piston and Connecting Rod Assemblies - Assembly and Installation Page 0-62 Engine Assembly (00-02) N14 The piston ring shipping package identifies the location of each piston ring by the part number. Install the rings in the sequence shown and in the proper orientation. The first and second rings have the word ‘‘TOP’’ stamped on the ring side facing the piston crown. The oil ring is not marked. NOTE: The oil control ring is symmetrical and can be installed in either orientation.
Engine Assembly (00-02) N14 Piston and Connecting Rod Assemblies - Assembly and Installation Page 0-63 Use clean LubriplateT 105 or its equivalent to lubricate the bearing shell. Apply a heavy film of clean 15W-40 oil to the liner. Put the piston and the ring assembly in a container of clean 15W-40 oil. Remove the piston and the ring assembly from the container. Allow the excess oil to drain from the piston. Install connecting rod guide pins, Part No. 3375601. Use piston ring compressor, Part No.
Piston and Connecting Rod Assemblies - Assembly and Installation Page 0-64 Engine Assembly (00-02) N14 Caution: To avoid piston damage, do not use a metal object to push the piston in the liner. NOTE: The tang of the connecting rod must be toward the camshaft side of the cylinder block. The piston cooling nozzles must be removed prior to installation of the piston and connecting rod assemblies. Caution: Do not use a hammer or equivalent to install the piston in the cylinder liner.
Engine Assembly (00-02) N14 Caution: The rod cap alpha-numeric characters must match the alpha-numeric characters on the connecting rod and must be installed with the characters aligned to prevent damage to the connecting rods and the crankshaft. The locking tang of the connecting rod cap must be toward the camshaft side of the cylinder block. Install the connecting rod caps and the capscrews. Tighten the rod capscrews in alternating sequence to the following torque values: • Tighten to 102 N•m [75 ft-lb].
Crankshaft Seal, Rear - Installation Page 0-66 Engine Assembly (00-02) N14 Remove the pins from the crankshaft oil seal driver, Part No. ST-997; and use the driver to align the rear cover with the crankshaft. Install the seal drive in the crankshaft flange and in the bore of the rear cover. Tighten the rear cover mounting capscrews. Torque Value: 47 N•m [35 ft-lb] Remove the crankshaft oil seal driver, Part No. ST-997. Use a gauge block, Part No. 3823495, to make sure the rear cover is within 0.
Engine Assembly (00-02) N14 Flywheel Housing - Installation Page 0-67 Install the pins in crankshaft oil seal driver, Part No. ST-997. Use crankshaft oil seal driver, Part No. ST-997, to install the oil seal in the rear cover. Flywheel Housing - Installation Caution: If a new flywheel housing is being installed, the dowels must be removed from the cylinder block prior to installing the housing to prevent damage to the housing. The housing must be doweled with an oversize dowel after it has been aligned.
Flywheel Housing - Installation Page 0-68 Engine Assembly (00-02) N14 Bore Alignment - Measurement Caution: The flywheel housing bore and the surface must be in alignment with the crankshaft to prevent possible damage to the engine, the clutch, or the transmission. Use chalk to mark the housing at the 12:00 o’clock, 3:00 o’clock, 6:00 o’clock, and 9:00 o’clock positions. Use dial gauge indicator (1), Part No. 3376050, and dial gauge attachment (2), Part No. ST-1325, to measure the bore alignment.
Engine Assembly (00-02) N14 Flywheel Housing - Installation Page 0-69 Determine the total indicator runout (T.I.R.) as follows: Example: 12 o’clock 3 o’clock 6 o’clock 9 o’clock Equals T.I.R. mm 0.00 +0.08 - 0.05 +0.08 0.13 in 0.000 +0.003 - 0.002 +0.003 0.005 The maximum allowable total indicator runout (T.I.R.) depends on the diameter of the housing bore. See the following chart: SAE No. 00 0 1/2 1 2 3 Bore Diameter mm 787.40 to 787.65 31.000 647.70 to 647.95 25.500 584.20 to 584.40 23.000 511.
Flywheel Housing - Installation Page 0-70 Engine Assembly (00-02) N14 If the alignment is not within specifications and the bore is round, the housing can be shifted. Refer to Section 16. If the alignment is not within specifications and the bore is not round, the housing must be replaced. Face Alignment - Measurement Install the dial indicator as shown. Caution: The tip of the gauge must not enter the capscrew holes or the gauge will be damaged.
Engine Assembly (00-02) N14 Flywheel Housing - Installation Page 0-71 Continue rotating the crankshaft until the dial indicator is at the 12:00 o’clock position. Check the dial indicator to make sure the needle still points to ‘‘0.’’ Determine the total indicator runout (T.I.R.) as follows: Example: 12 o’clock 3 o’clock 6 o’clock 9 o’clock Equals T.I.R. mm 0.00 +0.08 - 0.05 +0.08 0.13 in 0.000 +0.003 - 0.002 +0.003 0.005 The maximum allowable total indicator runout (T.I.R.
Flywheel - Installation Page 0-72 Engine Assembly (00-02) N14 If the alignment is not within specifications, remove the housing. Check for nicks, burrs, or foreign material between the block and the housing. Check the alignment again. If the alignment is not within specifications, the block or the housing is not machined correctly. Flywheel - Installation NOTE: Use a new pilot bearing when installing a new or rebuilt clutch. Use a mandrel and a hammer to remove the pilot bearing.
Engine Assembly (00-02) N14 Flywheel - Installation Page 0-73 Install two t-bolts into the flywheel clutch mounting surface. Install two 5/8 - 18 x 6-inch guide studs in the crankshaft flange. Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the part to avoid personal injury. Install the flywheel on the guide stud. Caution: Do not use an anti-seize compound, penetrating oil, or oil containing a friction modifier to lubricate the capscrews.
Flywheel - Installation Page 0-74 Engine Assembly (00-02) N14 Rotate the crankshaft one complete revolution. NOTE: The total indicator runout (T.I.R.) must not exceed 0.127 mm [0.0050-inch]. If the T.I.R. is greater than the specification, remove the flywheel. Inspect the flywheel mounting surface for dirt or damage. Inspect the crankshaft for dirt or damage. Replace the crankshaft if necessary.
Engine Assembly (00-02) N14 Install the flywheel, and inspect the bore runout again. Replace the flywheel if the runout does not meet specifications. Face Alignment - Measurement Install the contact tip of the indicator against the flywheel face, as close to the outside diameter as possible, to inspect the face (4) runout. Push the flywheel forward to remove the crankshaft end clearance. Adjust the dial on the indicator until the needle points to ‘‘0.’’ Rotate the crankshaft one complete revolution.
Cylinder Heads - Installation Page 0-76 Engine Assembly (00-02) N14 The total indicator runout (T.I.R.) must not exceed the following specifications: Flywheel Radius (A) mm 203 254 305 356 406 in 8 10 12 14 16 Maximum (T.I.R.) of Flywheel Face mm in 0.203 0.008 0.254 0.010 0.305 0.012 0.356 0.014 0.406 0.016 If the flywheel face runout is not within specification, remove the flywheel. Check for nicks, burrs, or foreign material between the flywheel mounting surface and the crankshaft flange.
Engine Assembly (00-02) N14 Install the cylinder heads over the dowel pins. If reusing original cylinder heads, install them in their original position. Use clean 15W-40 oil to lubricate the cylinder head capscrews and both sides of the flat washers. Allow the excess oil to drain from the threads. Install 12 capscrews and washers in each cylinder head. Complete the following steps to tighten the capscrews to the specified torque values in the sequence shown: • Tighten to 136 N•m [100 ft-lb].
Camshaft - Installation Page 0-78 Engine Assembly (00-02) N14 After all 12 capscrews on one head have been torqued to 298 N•m [220 ft-lb], they must be rotated in the tightening direction an additional 90 degrees. Rotate the capscrew until the mark on the cylinder head is between the next two marks joined by an arc (more than one flat and less than two flats). NOTE: When using torque plus angle, the tolerance on the 90 degree angle of rotation is one to two flats (90° plus or minus 30° ).
Engine Assembly (00-02) N14 Align the ‘‘O’’ mark on the camshaft gear with the ‘‘O’’ mark on the crankshaft gear. After aligning the ‘‘O’’ marks, push the camshaft in the bore until the thrust washer fits against the cylinder block. Remove the camshaft installation pilots. Do not allow the rubber bands to fall into the camshaft cavity of the cylinder block when removing the installation pilots. Use a dial indicator to check the backlash between the camshaft gear and the crankshaft gear.
Cam Follower Assemblies - Installation Page 0-80 Engine Assembly (00-02) N14 Turn the camshaft gear by hand in the opposite direction as far as it will freely move, and read the dial indicator. Backlash Between the Camshaft and the Crankshaft Gears mm in 0.05 MIN 0.002 0.50 MAX 0.020 If the backlash is excessive, inspect the camshaft and crankshaft gears for tooth wear and replace if necessary. If the backlash is tight, inspect for debris or damage to the gear teeth and check again.
Engine Assembly (00-02) N14 The injection timing code appears on the engine dataplate. Codes are alphabetic letters that relate to a numerical specification. Specifications can be found in the Control Parts List (CPL) Manual, Bulletin No. 3379133. Advanced timing (1) means the fuel is injected earlier into the cylinder during the compression stroke. Retarded timing (2) means the fuel injection occurs closer to TDC in the cylinder.
Injection Timing - General Information Page 0-82 Engine Assembly (00-02) N14 NOTE: The injection timing check is a measurement which determines the injector push rod travel in relation to the piston travel. Due to normal parts tolerances, it is necessary to check one cylinder for each cam follower housing. Timing Tool Installation Caution: Pivot the dial indicator stems away from their respective plunger rods before installing the timing fixture to prevent damage to the indicators.
Engine Assembly (00-02) N14 Align the plunger rod (1) and the injector push rod (3) with each other, and parallel to the plunger rod. NOTE: Tighten the clamp handle (2) after the plunger rod is aligned with the injector push rod. Loosen the support bracket (4) and slide the bracket down until the plunger rod (1) engages the injector push rod (3). NOTE: The support bracket must be aligned with the vertical line on the clamp handle bracket.
Injection Timing - General Information Page 0-84 Engine Assembly (00-02) N14 NOTE: The timing tool indicator needles will both start to move in the same direction of rotation as the piston approaches TDC if the cylinder is on the compression stroke. If both needles do not move in the same direction, rotate the engine one complete revolution in the same direction of rotation. The next frames explain proper orientation and measurement with the dial indicators.
Engine Assembly (00-02) N14 Put the push rod travel dial indicator in the center of the injector push rod plunger. Lower the indicator to within 0.63 mm [0.025-inch] of fully compressed position, and tighten the thumbscrew to hold the indicator in position. Set the dial indicator at ‘‘0’’ (zero). Lock the indicator face with the thumbscrew. Rotate the crankshaft in the opposite direction of engine rotation (counterclockwise ) through TDC to 45 degrees before top dead center (BTDC).
Injection Timing - General Information Page 0-86 Engine Assembly (00-02) N14 Compare the reading of the injector push rod travel indicator to the specification listed for the timing code. NOTE: The push rod travel indicator is read in a counterclockwise direction from ‘‘0’’ (zero). The total amount of travel represents the injection timing value. If the injection timing is not within the specified limits, check the following: 1. Is the timing tool correctly installed? 2.
Engine Assembly (00-02) N14 NOTE: The injection timing can be changed by removing the cam follower housing and by increasing or decreasing the gasket thickness. Each 0.18 mm [0.007-inch] of gasket thickness affects injection timing by approximately 0.05 mm [0.002-inch] indicator travel. NOTE: Gaskets are available in the following nominal thicknesses: 1. 0.18 mm [0.007-inch]. 2. 0.43 mm [0.017-inch]. 3. 0.43 mm [0.017-inch] (Print-O-Seal*). 4. 0.56 mm [0.022-inch]. 5. 0.76 mm [0.030-inch].
Injection Timing - General Information Page 0-88 Cam Follower Housing Gaskets Change in Push Rod Travel Gasket Thickness At 19° BTDC Part No. [mm] Inch [mm] Inch 3020000 0.36 to 0.51 0.09 to 0.13 (Print-O-Seal) [0.014 to 0.020] [0.0035 to 0.005] 3020001 0.15 to 0.20 0.04 to 0.05 [0.006 to 0.008] [0.0015 to 0.002] 3020002 0.36 to 0.51 0.09 to 0.13 [0.014 to 0.020] [0.0035 to 0.005] 3020003 0.51 to 0.61 0.13 to 0.15 [0.020 to 0.024] [0.005 to 0.006] 3020004 0.69 to 0.84 0.18 to 0.20 [0.027 to 0.033] [0.
Engine Assembly (00-02) N14 Accessory Drive - Installation Page 0-89 Accessory Drive - Installation Rotate the crankshaft until the accessory drive timing marks on the camshaft gear are at approximately the 1:00 o’clock position. Install a new gasket on the accessory drive assembly. Put the accessory drive shaft dowel pin at approximately the 11:30 o’clock position when facing the shaft from the pulley end. Install the accessory drive assembly in the gear housing accessory drive mounting hole.
Accessory Drive - Installation Page 0-90 Engine Assembly (00-02) N14 Use a dial indicator to check the backlash between the accessory drive gear and the camshaft gear. Install the tip of the dial indicator against a tooth on the accessory drive gear as shown. Push the accessory drive gear against the accessory drive thrust washer or thrust face. Hold the gear against the thrust washer or thrust face when checking the backlash.
Engine Assembly (00-02) N14 CELECT™ Engine Position Sensor (EPS) - Installation Page 0-91 CELECT™ Engine Position Sensor (EPS) - Installation Install a new EPS in the mounting hole in the block. Make sure a new o-ring is present and in place. Use service tool, Part No. 3822747. Tighten the EPS. Torque Value: 34 N•m [25 ft-lb] Lubricating Oil Pump - Installation Install a new gasket on the mounting trunion of the lubricating oil pump.
Gear Cover - Installation Page 0-92 Engine Assembly (00-02) N14 Turn the lubricating oil pump drive gear by hand as far as it will freely move, and set the dial indicator to ‘‘0’’ (zero). Turn the lubricating oil pump drive gear by hand in the opposite direction as far as it will freely move, and read the dial indicator. Backlash Between the Lubricating Oil Pump Drive Gear and the Camshaft Gear mm in 0.05 MIN 0.002 0.50 MAX 0.
Engine Assembly (00-02) N14 Cut off the ends of the gasket even with the cylinder block oil pan mounting flange. Mount a dial indicator on the front face of the crankshaft. Put the indicator plunger against the oil seal bore, and set the dial indicator to ‘‘0’’ (zero). Rotate the crankshaft one complete revolution while monitoring the indicator. The total indicator reading must not exceed 0.38 mm [0.015-inch]. If the total indicator runout exceeds 0.38 mm [0.015inch], remove the gear cover.
Crankshaft Seal, Front - Installation Page 0-94 Engine Assembly (00-02) N14 Crankshaft Seal, Front - Installation NOTE: ‘‘LDL TFE’’ (Lay-down Lip, Teflon) oil seals for service replacement have an assembly tool which protects the seal lip during shipment and installation. The ‘‘LDL TFE’’ oil seal must be installed with the lip of the seal and the crankshaft clean and dry. Do not use any kind of lubricant. The use of lubricant will result in oil leakage at the seal.
Engine Assembly (00-02) N14 Camshaft Bearing Support - Installation Page 0-95 The clearance between the bearing support thrust face and the camshaft gear must be 0.20 mm to 0.33 mm [0.008- to 0.013-inch]. After measuring the space between the bearing support and the gear cover flange, add an additional 0.20 mm to 0.33 mm [0.008-inch to 0.013-inch] to that number to determine the thickness of the shims required. Example: Space of 1.52 mm [0.060-inch], measured with a feeler gauge, plus 0.25 mm [0.
Accessory Drive Seal - Installation Page 0-96 Engine Assembly (00-02) N14 Caution: Do not use lubricating oil on the o-ring. The o-ring will increase in size when in contact with lubricating oil. Use vegetable oil to lubricate the o-ring. Lubricate the o-ring with vegetable oil, and install the support bearing into the gear cover. Tighten the capscrews. Torque Value: 27 N•m [20 ft-lb] Accessory Drive Seal - Installation Install the oil seal on the fuel pump drive oil seal mandrel, Part No.
Engine Assembly (00-02) N14 Accessory Drive Pulley - Installation Page 0-97 Accessory Drive Pulley - Installation NOTE: Make sure the pipe plug behind the pulley is installed and tightened before pulley installation. Apply a film of LubriplateT 105 or its equivalent to the accessory drive shaft. NOTE: Do not lubricate the seal or wear sleeve surfaces. This will prevent the seal from proper seat-in and cause the seal to leak. Align the keyway in the pulley with the dowel pin in the shaft.
Lubricating Oil Pan - Installation Page 0-98 Engine Assembly (00-02) N14 Lubricating Oil Pan - Installation Install the oil pan gasket and the oil pan on the cylinder block. Use your fingers to install and tighten one of the 7/16-inch oil pan mounting capscrews on each side of the oil pan, halfway between the front and the rear of the oil pan. Use your fingers to install and tighten all the mounting capscrews. Tighten the four 5/16-inch capscrews in the rear of the oil pan in the sequence shown.
Engine Assembly (00-02) N14 Rocker Lever Housing - Installation Page 0-99 Install the water tubes (A) in the front of the No. 2 and No. 3 rocker lever housings. Install the plugs (B) in the front of the No. 1 rocker lever housing and in the rear of the No. 3 rocker lever housing. Install new rocker lever housing gaskets on the cylinder heads. Install the rocker lever housings. Tighten the rocker lever housing capscrews in the sequence shown (1 through 6).
Injectors - Installation Page 0-100 Engine Assembly (00-02) N14 Use service tool, Part No. 3823819, to slide the two water tubes into the adjacent water manifold. Install the two water tube retainer clamps. Install and tighten the retainer clamp capscrews. Torque Value: 45 N•m [33 ft-lb] Injectors - Installation CELECT™ Engines NOTE: When installing injectors for reuse, new o-rings must be installed on the injector. NOTE: The CELECT™ injectors require three different injector o-rings.
Engine Assembly (00-02) N14 Injectors - Installation Page 0-101 If injector puller, Part No. 3823579, is not available, a screwdriver can be used to install the injector by putting the screwdriver on the injector body at the base of the injector solenoid and striking the screwdriver with a soft mallet. Do not strike on the injector solenoid or on the top stop spring cage. Warning: The injector must be fully seated before installing the hold down clamp.
Push Tubes - Installation Page 0-102 Engine Assembly (00-02) N14 NOTE: When installing injectors for reuse, new o-rings must be installed on the injector. Lubricate the o-rings with lubricating oil just before installation. Install the injector and hold down clamp. Use injector puller, Part No. 3822697, to install STC injectors. Make sure the injector oil feed is aligned over the oil transfer tube. Install the hold down clamp capscrew.
Engine Assembly (00-02) N14 Install the push tubes in the corresponding numbered location. On CELECT™ engines, take care to route the injector solenoid leads to avoid contact with the valve and injector push tubes. Twist the injector connector three turns to twist the lead wires. Connect the injector solenoid connector lead to the pass through connector in the rocker housing. Push the connector lead into the connector until the retainer seats.
Rocker Lever Shaft Assemblies - Installation Page 0-104 Engine Assembly (00-02) N14 Use a wire gauge to check the clearance between the crosshead and the valve spring retainer. The clearance must be a minimum of 0.51 mm [0.020-inch]. NOTE: The large pocket goes toward the exhaust side. Rocker Lever Shaft Assemblies Installation Install the exhaust (1), injector (2), and intake (3) rocker levers onto the shaft. The two levers closest to the center of the rocker housing are the intake valve rocker levers.
Engine Assembly (00-02) N14 Make sure the push rods are in the cam follower sockets, and align the push rods with the injector and valve rocker lever adjusting screws. Alternately tighten the rocker shaft capscrews in 54 N•m [40 ft-lb] increments to 156 N•m [115 ft-lb]. Injector and Valve Adjustment CELECT™ Engines The valve set marks are located on the accessory drive pulley. The marks align with a pointer on the gear cover. Use the accessory drive shaft to rotate the crankshaft.
Injector and Valve Adjustment Page 0-106 CELECT™ Engine Injector and Valve Adjustment Sequence Bar Engine in Direction Pulley Set Cylinder of Rotation Position Injector Valve Start A 1 1 Advance to B 5 5 Advance to C 3 3 Advance to A 6 6 Advance to B 2 2 Advance to C 4 4 Firing Order: 1-5-3-6-2-4 Engine Assembly (00-02) N14 The valves and the injectors on the same cylinder are adjusted at the same index mark on the accessory drive pulley.
Engine Assembly (00-02) N14 Injector and Valve Adjustment Page 0-107 Tighten the adjusting screw on the injector rocker lever. Torque Value: 2.8 N•m [25 in-lb] Caution: After preloading the CELECT™ injector to 2.8 N•m [25 in-lb], make sure to back out the adjusting screw two flats (120 degrees) or damage to the injector will result. Back out the adjusting screw on the injector rocker lever two flats (120 degrees). NOTE: Two flats will provide 0.63 mm [0.025 inch] lash. The specification is 0.50 to 0.
Injector and Valve Adjustment Page 0-108 Engine Assembly (00-02) N14 Select a feeler gauge for the correct valve lash specification. Valve Lash Specifications Intake Exhaust 0.35 mm 0.68 mm [0.014-inch] [0.027-inch] Insert the feeler gauge between the top of the crosshead and the rocker lever pad. Two different methods for establishing valve lash clearance are described below. Either method can be used; however, the torque wrench method has proven to be the most consistent.
Engine Assembly (00-02) N14 Injector and Valve Adjustment Page 0-109 If using the feel method, attempt to insert a feeler gauge that is 0.03 mm [0.001-inch] thicker between the crosshead and the rocker lever pad. The valve lash is not correct when a thicker feeler gauge will fit. After adjusting the injector on cylinder No. 1 and the valves on cylinder No. 1, rotate the accessory drive; and align the next valve set mark with the pointer.
Injector and Valve Adjustment Page 0-110 Engine Assembly (00-02) N14 All overhead (valve and injector) adjustments must be made when the engine is cold (any stabilized coolant temperature at 60°C [140°F] or below). Each cylinder has three rocker levers: • The exhaust rocker lever (1). • The injector rocker lever (2). • The intake rocker lever (3). The two levers closest to the center of each rocker housing are the intake rocker levers.
Engine Assembly (00-02) N14 Check the valve rocker levers on cylinder No. 5 to see if both the intake and exhaust valves are closed. NOTE: Both the intake and exhaust valves are closed when both rocker levers are loose and can be moved from side to side. If both valves are not closed, rotate the accessory drive one complete revolution; and align the ‘‘A’’ mark with the pointer again.
Injector and Valve Adjustment Page 0-112 Engine Assembly (00-02) N14 Apply thumb pressure to the tool handle to hold the tappet in the maximum upward position. Caution: An overtightened setting on the injector adjusting screw will produce increased stress on the injector train and the camshaft injector lobe which can result in engine damage. NOTE: Apply enough pressure on the tool handle so that the tappet does not move downward when the 0.56 to 0.68 N•m [5 to 6 in-lb] torque is applied.
Engine Assembly (00-02) N14 Injector and Valve Adjustment Page 0-113 With the ‘‘A’’ set mark aligned with the pointer on the gear cover and both valves closed on cylinder No. 5, loosen the lock nuts on the intake and the exhaust valve adjusting screws. Select a feeler gauge for the correct valve lash specification. Valve Lash Specifications Intake Exhaust 0.35 mm 0.68 mm [0.014-inch] [0.027-inch] Insert the feeler gauge between the top of the crosshead and the rocker lever nose.
Injector and Valve Adjustment Page 0-114 Engine Assembly (00-02) N14 After tightening the lock nut to the correct torque value, check to make sure the feeler gauge will slide backward and forward between the crossheads and the rocker lever with only a slight drag. If using the feel method, attempt to insert a feeler gauge that is 0.03 mm [0.001-inch] thicker between the crosshead and the rocker lever pad. The valve lash is not correct when a thicker feeler gauge will fit.
Engine Assembly (00-02) N14 Engine Brake - Installation Page 0-115 Engine Brake - Installation Install two guide pins into each rocker lever housing. Install new C-Brake housing gaskets and the C-Brakes. Remove the guide pins. Install the C-Brake capscrews. Tighten the capscrews in the sequence shown to the torque value listed below.
Engine Brake - Adjustment Page 0-116 Engine Assembly (00-02) N14 Rotate the crankshaft in the direction of engine rotation. Align the ‘‘A’’ mark on the accessory drive pulley with the pointer on the gear cover. When the ‘‘A’’ mark is aligned, the intake and exhaust valves rocker levers must be loose for cylinder No. 5. NOTE: Both the intake and exhaust valves are closed when both rocker levers are loose and can be moved from side to side.
Engine Assembly (00-02) N14 Loosen the lock nut for the No. 5 slave piston adjusting screw. Install a dial indicator, Part No. 3375006, over the No. 5 slave piston adjusting screw. Use the adapter, Part No. 3823826, to mount the dial indicator fixture to the C-Brake. Tighten the adjusting screw until the slave piston contacts the crosshead. Zero the gauge with the dial indicator stem resting on the adjusting screw. Loosen the adjusting screw until the indicator needle shows 0.58 mm [0.023-inch].
Engine Brake - Adjustment Page 0-118 Engine Assembly (00-02) N14 Use the torque wrench adapter, Part No. ST-669, and a 1/4-inch eight point socket to tighten the lock nut.
Engine Assembly (00-02) N14 Rocker Housing Covers - Installation Page 0-119 Tighten the slave piston adjusting screw until the slave piston contacts the feeler gauge and creates a slight drag. Use the torque wrench adapter, Part No. ST-669, to tighten the lock nut. Torque Value: 24 N•m [18 ft-lb] Repeat this procedure to adjust the remaining slave pistons.
Intake Manifold - Installation Page 0-120 Engine Assembly (00-02) N14 Install the covers on the rocker lever housing. Install the ten capscrews and washers in each cover. Tighten the capscrews in each cover in the sequence shown. Torque Value: 12 N•m [105 in-lb] Install the rubber grommet, breather tube, and oil filler cap into the rocker housing covers, if applicable. Intake Manifold - Installation Install the intake air connection to the intake manifold. Make sure the gasket is seating in its groove.
Engine Assembly (00-02) N14 CELECT™ Intake Air Temperature Sensor - Installation Page 0-121 CELECT™ Intake Air Temperature Sensor - Installation Install the sensor in the engine. Tighten the sensor. Torque Value: 35 N•m [25 ft-lb] Make sure the sensor is installed with a new o-ring. CELECT™ Boost Pressure Sensor Installation Install the sensor on the engine. Tighten the capscrews. Torque Value: 30 N•m [22 ft-lb] Make sure the sensor has a sealing ring on the bottom side of the sensor.
Lubricating Oil Pump Signal Line - Installation Page 0-122 Engine Assembly (00-02) N14 Connect the sensor drain line (1) to the tee fitting on the cylinder block. Torque Value: 27 N•m [20 ft-lb] Connect the pressure signal line (1) to the lubricating pump fitting (2) and the rifle pressure supply line (3) to the oil rifle fitting (4). Torque Values: 1. 10 N•m 3. 10 N•m [89 in-lb] [89 in-lb] Lubricating Oil Pump Signal Line Installation On CELECT™ engines, install the DFC signal line.
Engine Assembly (00-02) N14 Fuel Tubing - Installation Page 0-123 Install a new o-ring on the oil pan lubricating oil suction tube. Use clean vegetable oil to lubricate the o-ring. Loosely install the lubricating oil transfer tube assembly with the lubricating oil pump mounting flange, new sealing ring, new gasket, and the mounting capscrews to the oil pan and lubricating oil pump. NOTE: The printed side of the mounting flange gasket on the oil transfer tube must be toward the flange.
Air Compressor - Installation Page 0-124 Engine Assembly (00-02) N14 Air Compressor - Installation Install the splined coupling on the accessory drive. Make sure the gasket surfaces of the accessory drive and the air compressor are clean and not damaged. It is not necessary to time the air compressor on the NT engine. Although the Big Cam III through 88 NT publications have specified air compressor timing, this is not required on any NT engine. Use a new gasket when installing the air compressor.
Engine Assembly (00-02) N14 CELECT™ ECM Cooling Plate - Installation Page 0-125 STC Engines Install the fuel pump drive spider coupling. Use a new gasket to install the fuel pump. Install the four fuel pump mounting capscrews.
CELECT™ Lubricating Oil Pressure Sensor - Installation Page 0-126 Engine Assembly (00-02) N14 Connect and tighten the inlet and outlet fuel hoses to the cooling plate. Inspect for paint or grease on the cooling plate. CELECT™ Lubricating Oil Pressure Sensor - Installation Install the sensor on the engine. Tighten the capscrews. Torque Value: 30 N•m [22 ft-lb] Install the oil pressure signal line. Push the connectors until they lock.
Engine Assembly (00-02) N14 CELECT™ Sensor Harness - Installation Page 0-127 CELECT™ Sensor Harness - Installation Install the sensor wiring harness on the engine. Install the sensor harness amp connector to the electronic control module (ECM). Tighten the connector capscrews to the ECM. Torque Value: 2.0 N•m [18 in-lb] Install the sensor wiring harness retaining clamps to the support bracket and the engine block.
CELECT™ Actuator Harness - Installation Page 0-128 Engine Assembly (00-02) N14 On engines equipped with engine brakes, connect the engine brake harness to the sensor harness. Wire tie the harness to the fuel tubing at the rear of the engine. CELECT™ Actuator Harness - Installation Install the actuator harness on the engine. Install the actuator harness amp connector to the ECM. Tighten the two connector capscrews to the ECM. Torque Value: 2.
Engine Assembly (00-02) N14 STC Oil Control Valve - Installation Page 0-129 Connect the actuator harness to each of the pass through connectors along the side of the rocker lever housing. Make sure the connector clicks/snaps into place. Install a new plastic wire tie, Part No. 3062329, to each of the pass through connectors to hold the actuator harness to the pass through connectors. Connect the fuel shutoff control wire to the fuel shutoff solenoid. Tighten the retaining nut. Torque Value: 2.
STC External Oil Plumbing - Installation Page 0-130 Engine Assembly (00-02) N14 STC External Oil Plumbing - Installation Connect the following lines to the STC oil control valve and tighten them to the specified torque: 1. Fuel pressure sensing line - 9.5 N•m [84 in-lb] 2. Oil outlet line to tappets - 13.6 N•m [120 in-lb] 3. Oil vent line - 9.5 N•m [84 in-lb] 4. Oil supply line - 13.6 N•m [120 in-lb] Install the check valve retaining clamp and check valve on the cam follower stud.
Engine Assembly (00-02) N14 Engine Support Bracket, Front - Installation Page 0-131 Engine Support Bracket, Front Installation Install the engine support bracket and the eight mounting capscrews. Tighten the capscrews. Torque Value: 68 N•m [50 ft-lb] Vibration Damper - Installation Install two guide pins into the end of the crankshaft. Install the pulley and the vibration damper.
Vibration Damper - Installation Page 0-132 Engine Assembly (00-02) N14 Install the dial indicator on the gear cover as indicated to measure damper eccentricity. Rotate the crankshaft, and record the indicator movement. Replace the vibration damper if the eccentricity exceeds 0.10 mm [0.004-inch] per 25.4 mm [1.0 inch] of the damper diameter. Install the dial indicator as indicated to measure wobble. Push the crankshaft to the front or to the rear.
Engine Assembly (00-02) N14 Rotate the crankshaft 360 degrees, maintaining the position of the crankshaft (either toward the front or the rear) in relation to the block. Record the total indicator motion. Replace the damper if wobble exceeds 0.18 mm [0.007inch] per 25.4 mm [1.0 inch] of radius. This is the same as 0.09 mm [0.0035-inch] per 25.4 mm [1.0 inch] of damper diameter. Water Pump - Installation Caution: The water pump must have a dowel pin locating hole (1) and oil cooler return passage (2).
Water Pump Belt - Installation and Adjustment Page 0-134 Engine Assembly (00-02) N14 Water Pump Belt - Installation and Adjustment Visually inspect the pulley alignment. Pulley misalignment must not exceed 0.5 mm per cm [1/16-inch per foot] of distance between the pulley centers. Inspect and repair or replace the idler pulley or water pump if pulley misalignment exceeds 0.5 mm per cm [1/16-inch per foot]. Install a new belt on the pulleys. Turn the adjusting screw to adjust belt tension.
Engine Assembly (00-02) N14 Thermostat Housing - Installation Page 0-135 Thermostat Housing - Installation Install the water transfer tube with new o-rings into the water pump housing. Apply a non-petroleum based lubricant such as soap or vegetable oil to the o-rings on each end of the tube and to the bores in the water pump housing and the thermostat housing cover. Install the thermostat housing assembly and mounting gasket on the rocker lever housing and onto the water transfer tube.
Fan Hub and Fan Hub Support Bracket - Installation Page 0-136 Engine Assembly (00-02) N14 Install the coolant tubes to the air compressor and the water pump. Install the coolant tube to the thermostat housing. Fan Hub and Fan Hub Support Bracket - Installation Install the following pieces on the engine and tighten the capscrews.
Engine Assembly (00-02) N14 Fan Belts - Installation and Adjustment Visually inspect the pulley alignment. Pulley misalignment must not exceed 0.5 mm per cm [1/16-inch per foot] of distance between the pulley centers. Inspect, repair, or replace the fan hub or the fan hub support bracket if pulley misalignment exceeds 0.5 mm per cm [1/16-inch per foot]. Install new belts on the pulley. When a drive pulley uses two or more belts, replace the belts as a complete set.
Engine - Removal From the Rebuild Stand Page 0-138 SAE Belt Size In. .380 .440 1/2 11/16 3/4 7/8 4 Rib 5 Rib 6 Rib 8 Rib 10 Rib 12 Rib Belt Tension Specifications Belt Tension New Belt Gauge Installation Part No.
Engine Assembly (00-02) N14 Use the hoist to move the weight of the engine off of the rebuild stand. Remove the capscrews that hold the engine to the adapter plate. Install the engine on two engine support stands, Part No. ST-163. Piston Cooling Nozzles - Installation Use vegetable oil to lubricate the new o-rings. Do not soak the new o-rings in engine oil. Install the o-rings in the groove of the piston cooling nozzle. Install 4 inch X 3/8-16 guide studs in the capscrew holes.
Dipstick Tube and Housing - Installation Page 0-140 Engine Assembly (00-02) N14 Install and tighten the capscrews. Torque Value: 16 N•m [140 in-lb] Dipstick Tube and Housing - Installation Install the dipstick tube housing and a new gasket. Install the four capscrews, and tighten. Torque Value: 47 N•m [35 ft-lb] NOTE: Check the dipstick calibration after the engine is installed in the vehicle chassis. Refer to N14 Troubleshooting and Repair Manual, Bulletin No. 3810456.
Engine Assembly (00-02) N14 Lubricating Oil Cooler Assembly - Installation Page 0-141 Lubricating Oil Cooler Assembly Installation Install two guide studs in the oil cooler support mounting holes in the cylinder block. Install a new oil cooler support gasket over the guide studs. Install the oil cooler assembly over the guide studs, and push it against the cylinder block. Install the oil cooler support bracket capscrew. Do not tighten at this time.
Alternator Mounting Bracket - Installation Page 0-142 Engine Assembly (00-02) N14 Alternator Mounting Bracket - Installation Install the alternator mounting bracket. Tighten the mounting capscrews. Torque Value: 47 N•m [35 ft-lb] Alternator - Installation Install the alternator, capscrew, washer, and nut to the alternator mounting bracket. Install the adjusting link and the mounting capscrews.
Engine Assembly (00-02) N14 Fan and Fan Spacer - Installation Page 0-143 Adjust the belt tension to the following values: New Belt Tension 620 N [140 lbf] Used Belt Tension 490 N [110 lbf] NOTE: A belt is considered used if it has been in operation for more than 10 minutes. If the belt will not maintain the correct tension, it must be replaced.
Starting Motor - Installation Page 0-144 Engine Assembly (00-02) N14 Starting Motor - Installation Caution: Make sure to use the same thickness of starting motor spacer (if used) as the one removed to install the starting motor to prevent engine or starting motor damage. Install the starting motor and the three capscrews. Tighten the capscrews. Torque Value: 176 N•m [130 ft-lb] Exhaust Manifold - Installation Install two guide studs.
Engine Assembly (00-02) N14 Turbocharger - Installation Page 0-145 Tighten the capscrews in two steps in the sequence shown. Torque Values: Step 1 47 N•m [35 ft-lb] Step 2 81 N•m [60 ft-lb] Turbocharger - Installation Apply a film of high temperature anti-seize compound, Part No. 3823097, to the turbocharger mounting studs. Install a new mounting gasket, the turbocharger, and the four mounting nuts. Tighten the mounting nuts.
Turbocharger - Installation Page 0-146 Engine Assembly (00-02) N14 Install a new gasket, oil drain tube, and capscrews. Tighten the capscrews. Torque Value: 44 N•m [32 ft-lb] Pour 50 to 60 cc [2.0 to 3.0 ounces] of clean engine oil in the turbocharger oil supply opening. If installing a new turbocharger, install the male union elbow. Torque Value: 30 N•m [22 ft-lb] Install the turbocharger oil supply tube. Torque Value: 30 N•m [22 ft-lb] Install the turbocharger drain tube to the turbocharger.
Engine Assembly (00-02) N14 Crankcase Breather Tube - Installation Page 0-147 Crankcase Breather Tube - Installation Install the breather vent tube on the breather tube, and tighten the hose clamps. Torque Value: 4.5 N•m [40 in-lb] Install and tighten the tube support brackets and capscrews. Torque Value: 47 N•m [35 ft-lb] Lubricating Oil Filter - Installation NOTE: The o-ring can stick on the filter head. Make sure it is removed before installing a new filter. Clean the oil filter head surface.
Engine - Covering All Openings Page 0-148 Engine Assembly (00-02) N14 If the engine is to be run-in on an engine dynamometer, make sure the shutoff valve is closed. Open the valve after the run-in. Be sure the engine draincock and oil cooler draincock are closed. Engine - Covering All Openings Cover all engine openings to prevent dirt and debris from entering the engine.
Cylinder Block N14 Page 1-1 Section 1 - Cylinder Block - Group 01 Section Contents Page Camshaft - Cleaning and Inspection .............................................................................................................. 1-63 Cleaning ....................................................................................................................................................... 1-63 Inspection ..............................................................................................
Page 1-2 Cylinder Block N14 Page Cylinder Block - Exploded View........................................................................................................................ 1-6 Cylinder Block - General Information ............................................................................................................... 1-8 Cylinder Block - Machining .............................................................................................................................
Cylinder Block N14 Cylinder Block - Service Tools Page 1-3 Cylinder Block - Service Tools The following special tools are recommended to perform procedures in section 1. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Connecting Rod Checking Fixture Measure connecting rod bend and twist.
Cylinder Block - Service Tools Page 1-4 Tool No. Cylinder Block N14 Tool Description Loctite Compound Use to install repair bushings. ST-1272-12 Loctite Primer T ST-1272-13 Use to clean the counterbore area and the outside diameter of the repair sleeve. Pipe Sealant Use when installing pipe plugs on engines to stop leaks. 3375066 Cup Plug Sealant Use when installing cup plugs on engines to stop leaks. 3375068 Dial Bore Gauge Kit Used to measure internal bore diameters.
Cylinder Block N14 Cylinder Block - Service Tools Page 1-5 Tool No. Tool Description Camshaft Bushing Driver 3375861 Use camshaft bushing driver set, Part No. 3376637, and driver, Part No. 3375861, to remove bushing No. 1 through No. 7. Camshaft Bushing Driver Use to install camshaft bushings No. 3 and No. 5. 3376412 Camshaft Bore Cup Plug Driver 3376818 Required to correctly position the rear camshaft bore cup plug in the cylinder block.
Cylinder Block - Exploded View Page 1-6 Cylinder Block N14 Cylinder Block - Exploded View
Cylinder Block N14 Ref. No.
Cylinder Block - General Information Page 1-8 Cylinder Block N14 Cylinder Block - General Information 1. A WARNING statement is included for any component or assembly that weighs more than 23 kg [50 lb]. To avoid personal injury, use a hoist or get assistance from more than one person when removing or installing these parts. 2. Most of the capscrews used on the N14 engine are U.S. Customary. All fasteners have right-hand threads unless a CAUTION states that a fastener has left-hand threads.
Cylinder Block N14 Cylinder Block - Disassembly (01-01) Cam Bore Rear Cup Plug - Removal To remove the cup plug from the camshaft bore, use a center punch to mark the cup plug for drilling. Drill a 3.18 mm [1/8-inch] hole in the cup plug. Use an expansion plug removal tool, Part No. 3823159, to remove the cup plug. NOTE: Discard all used cup plugs. Straight Thread Plug and Pipe Plug Removal Remove the straight thread plugs and pipe plugs from all oil passages in the cylinder block.
Cylinder Block - Disassembly (01-01) Page 1-10 Cylinder Block N14 Remove the straight thread plug and pipe plug from the piston cooling oil passage on the exhaust side of the cylinder block. Remove pipe plugs from the coolant passage on the exhaust side of the cylinder block. Remove the straight thread plug from the piston cooling passage at the rear of the cylinder block. Remove the pipe plug from the main oil passage at the rear of the cylinder block.
Cylinder Block N14 Camshaft Bushings - Removal Use camshaft bushing driver set, Part No. 3376637, and driver, Part No. 3375861, to remove bushings No. 1 through No. 7. Remove the No. 1 bushing first and then the remaining six (6) bushings in order from front to rear. To remove bushings No. 1 through No. 7, insert the tool assembly through the camshaft bore until the driver is against the bushing. Hit the slide hammer against the shaft assembly until the bushing is driven from the bore. To remove the No.
Cylinder Block - Cleaning and Inspection (01-02) Page 1-12 Cylinder Block N14 Clean the following cylinder block areas: Cylinder liner counterbore ledge and press fit area. Cylinder liner packing ring bore. Cylinder head deck surface. Main bearing saddles and caps.
Cylinder Block N14 Camshaft bore cup plug area. All gasket surfaces. All component mounting surfaces. Clean all oil passages. Use a bottle brush with a long handle.
Cylinder Block - Cleaning and Inspection (01-02) Page 1-14 Cylinder Block N14 Warning: Use a face shield, rubber gloves, an apron, and boots and obey the warning label on the cleaning solution used to prevent personal injury. Caution: Use a cleaning solution that will not damage the camshaft bushings if the bushings have not been removed. Remove the block from the engine stand. Put the block in a cleaning tank.
Cylinder Block N14 Cylinder Block - Cleaning and Inspection (01-02) Page 1-15 NOTE: If the cylinder block is not going to be used immediately, apply a coating of preservative oil to prevent rust. Cover the block to prevent dirt from sticking to the oil. Camshaft Bore - Cleaning Use a fine emery cloth to remove burrs, and clean the bushing bores. Camshaft Bore - Inspection Measure the cylinder block camshaft bore inside diameter. mm 68.237 68.262 Camshaft Bore I.D. MIN MAX in 2.6865 2.
Cylinder Block - Cleaning and Inspection (01-02) Page 1-16 Cylinder Block N14 Use two centering rings, Part No. ST-1177-39 [4.750 inches diameter]. Put the rings in the No. 2 and the No. 6 main bearing locations. Use clean 15W-40 oil to lubricate the main bearing capscrew threads and the flat washers. Drain the excess oil from the capscrews before installing them. Caution: The main bearing caps are marked for position (1) on the camshaft side and the cylinder block identification (2) on the exhaust side.
Cylinder Block N14 4. Hit the cap with a rubber mallet to push it into the correct position. NOTE: The main bearing caps must not have any side clearance with the block. Cylinder Block to Main Bearing Cap Press Fit mm in 0.03 MIN 0.001 0.15 MAX 0.006 Put the checking ring into the cylinder block main bearing saddle. Put the main bearing cap over the checking ring. Tighten the main bearing cap capscrews to the following torque values in the sequence shown: 1. Tighten to 120 N•m [90 ft-lb]. 2.
Cylinder Block - Cleaning and Inspection (01-02) Page 1-18 Cylinder Block N14 Insert the bar through the centering rings while slowly rotating the bar. The bar must turn easily. If the bar does not turn easily, check to make sure the main bearing caps are installed correctly. If they appear to be okay, move one of the centering rings to another bearing location. Slide one end of the bar out of a centering ring. Slide the checking ring, Part No. ST-1177-13, onto the bar.
Cylinder Block N14 Use a 0.08 mm [0.003-inch] feeler gauge that is not more than 13 mm [0.5-inch] wide. Center the checking ring in the bore. Try to put the feeler gauge between the checking ring and the bore. Rotate the gauge in the bore at both sides of the checking ring. The bore alignment of the main bearing is okay if: • the gauge does not enter at any point. • the gauge will enter but will not slide through or around the bore and the alignment bar will rotate with the gauge inserted.
Cylinder Block - Cleaning and Inspection (01-02) Page 1-20 Cylinder Block N14 Measure the inside diameter in the three positions shown. The inside diameter must be completely round within 0.0190 mm [0.00075-inch]. Main Bearing Bore I.D. (Capscrews Torqued to Specification) mm in 120.599 MIN 4.7480 120.637 MAX 4.7495 Cylinder Block - Inspection Caution: All measurements of the cylinder block must be made when the block is positioned on a flat surface.
Cylinder Block N14 The height of the block must not vary more than 0.05 mm [0.002-inch] from end to end of the block. If the block height is not within specifications, the top surface of the block must be machined or the block must be replaced. NOTE: If the top surface of the block is machined, the ledge depth of the cylinder liner counterbore must be machined. Refer to the NH/NT Counterbore Troubleshooting and Repair Manual, Bulletin No. 3810450, or the N14 Troubleshooting and Repair Manual, Bulletin No.
Cylinder Block - Machining (01-03) Page 1-22 Cylinder Block N14 Closed end thread repair inserts can be used in conjunction with upper counterbore sleeves (0.020-inch oversize on the outside diameter or smaller), and coolant passage repair inserts. Cylinder blocks with vertical cracks that extend down over the counterbore ledge that can not be machined out using a 0.750-inch long sleeve can not be repaired. In this case, the cylinder block must be replaced.
Cylinder Block N14 Cylinder Block - Machining (01-03) Page 1-23 Coolant Passage - Repairing The coolant passage repair kit, Part No. 3823679, consists of the following components: Ref. No. 1 Tool No.
Cylinder Block - Machining (01-03) Page 1-24 Cylinder Block N14 Tap until the stop contacts the cylinder block head deck surface. Clean the threads with safety solvent, Part No. 3823717. Allow to dry. Clean the coolant passage insert with a safety solvent, Part No. 3823717. Allow to dry. Liberally apply the sealing and retaining compound to the coolant passage insert threads.
Cylinder Block N14 Start the insert with your fingers, and install it approximately half way. Liberally apply the sealing and retaining compound to the upper half of the thread, and finish installing with the installation tool. Blend the top of the insert and the block with a file.
Cylinder Block - Machining (01-03) Page 1-26 Cylinder Block N14 Cylinder Head Capscrew Holes - Repairing Components included in the capscrew thread repair kit, Part No. 3376208, for the N14 block are as follows: Ref. No. 2 3 4 5 6 7 8 9 Tool No. Description 3376008 3376006 3376007 ST-1272-5 ST-1272-11 ST-1272-13 ST-1272-12 or 3823718 ST-1272-9 Insert Reamer Tap Locator Chip Removal Unit LoctiteT Primer-T Retaining Compound Stop Collar Remove any burrs from the top deck surface of the cylinder block.
Cylinder Block N14 Ream the failed capscrew hole to the full depth of the hole. Use a chip removing unit to remove reamer chips from the capscrew hole. Set the tap stop collar to the correct height, using the insert to be installed. Tap the capscrew hole. NOTE: It can be necessary to stop, remove the tap, and remove chips from the hole several times before achieving full depth. Use a chip removing unit to clean the capscrew hole of shavings and debris. Remove the tap.
Cylinder Block - Machining (01-03) Page 1-28 Cylinder Block N14 Clean and flush the newly cut threads with safety solvent, Part No. 3823717. Use a chip removing unit to clean the capscrew hole of shavings and debris, and allow to dry. Lightly spray the threads with LoctiteT Primer-T, Part No. ST-1272-13, and allow to dry. Prepare the thread insert for installation. Put the jam nut on a cylinder head capscrew. Install the repair insert on the capscrew until it contacts the jam nut.
Cylinder Block N14 Install and tighten the repair insert. Loosen the jam nut. Remove the cylinder head capscrew and jam nut arrangement. Correct installation will provide 0.00 mm to 0.50 mm [0.000-inch to 0.020-inch] protrusion above the cylinder block surface. File the top of the thread repair insert even with the cylinder head mounting surface.
Cylinder Block Counterbore - Inspection and Machining (1-04) Page 1-30 Cylinder Block N14 Make sure the inside portion of the repair insert is clean. Remove any file shavings or debris. Before tightening the cylinder head capscrews, allow the sealant to cure for 3 hours. Cylinder Block Counterbore - Inspection and Machining (1-04) Due to the complex nature of troubleshooting procedures required for diagnosis and repair of counterbores, this information has been excluded from this manual.
Cylinder Block N14 Install the camshaft bushings in the following order: No. 7, No. 6, No. 5, No. 4, No. 3, No. 2, and No. 1. Bushing (No. 7) - Installation An alignment pointer, Part No. 3823635, is used to align the cam bearing oil holes with the oil holes in the block. To use, mount the bearing on the driver. Place the alignment pointer against the machined side of the block at the cam follower holes with the end of the rod at the top of the bearing.
Cylinder Block - Assembly (01-05) Page 1-32 Cylinder Block N14 Bushings (No. 6 through No. 2) - Installation An alignment pointer, Part No. 3823635, is used to align the cam bearing oil holes with the oil holes in the block. To use, mount the bearing on the driver. Place the alignment pointer against the machined side of the block at the cam follower holes with the end of the rod at the top of the bearing. Rotate the cam bearing until the seam of the bearing is at the end of the rod.
Cylinder Block N14 Use a 2.39 mm [0.094-inch] diameter rod or a 3/32-inch hexagon wrench to check the position and the location of the oil hole in the bushing and the cylinder block. The rod must pass through the oil holes in the bushing and into the oil supply drillings in the cylinder block. Bushing (No. 1) - Installation NOTE: Camshaft bushing guide, Part No. ST-1228-6, is not used to install the No. 1 bushing. An alignment pointer, Part No.
Cylinder Block - Assembly (01-05) Page 1-34 Cylinder Block N14 Dowel Pin - Installation NOTE: Do not install the dowel pins in the block until the inspection and any necessary repair procedures are completed. Caution: Do not use a hammer. Damage to the dowel pin will result. Use a plastic mallet. Install the six cylinder head groove pins, two front cover dowel pins, one water pump dowel pin, six cam follower housing dowel pins, and two flywheel housing dowel pins.
Cylinder Block N14 Cylinder Block - Assembly (01-05) Page 1-35 Install a 3/8-inch pipe plug in the piston cooling oil crossover passage at the front of the cylinder block. Tighten the pipe plug. Torque Value: 27 N•m [20 ft-lb] Install a 3/4 - 16 straight thread plug in the piston cooling oil passage at the rear of the cylinder block. Tighten the straight thread plug. Torque Value: 75 N•m [55 ft-lb] Install a 3/4 - 16 straight thread plug in the piston cooling oil passage.
Cylinder Liners - Cleaning and Inspection (01-06) Page 1-36 Cylinder Block N14 Cam Bore Rear Cup Plug - Installation Caution: Do not install cup plugs in the block until the cleaning, inspection, and necessary repair procedures are completed. This will prevent dirt from being trapped in the engine. Use cup plug sealant, Part No. 3375068, to seal the outside diameter of the cup plugs. Use cup plug driver, Part No. 3376818, to install the cup plug. A cup plug driver handle, Part No. 3376795, is required.
Cylinder Block N14 Caution: Do not use a hone, deglazing, or prebrushing to clean the cylinder liners. Abrasives can damage the finish and the pattern and can contaminate the liner. Warning: Wear eye protection. Make sure the wire brush is rated for the RPM being used if the brush is motor driven. Use a high quality steel wire brush to clean the liner flange seating area. Use a fine, fibrous abrasive pad such as Scotch-BriteT 7448, Part No. 3823258, or its equivalent to remove the remaining carbon.
Cylinder Liners - Cleaning and Inspection (01-06) Page 1-38 Cylinder Block N14 Inspection Visually inspect for pitting or erosion in the crevice seal groove. Replace the liner if pitting or erosion is greater than one-half the width of the crevice seal groove. Visually inspect the outside diameter for excessive corrosion or pitting. Pits must not be more than 1.60 mm [0.063-inch] deep. Replace the liner if the pits are too deep or if the corrosion can not be removed with a fine emery cloth.
Cylinder Block N14 Inspect for cracks under the flange. NOTE: Cracks can also be detected by using either magnetic inspection or the dye method. Replace the liner if cracks are found in the flange area. Visually inspect the exterior of the liners. The presence of any coating can indicate an inadequate concentration level of supplemental coolant additives (SCA). The proper concentration level of SCA will protect against the formation of scale or oil coatings.
Cylinder Liners - Cleaning and Inspection (01-06) Page 1-40 Cylinder Block N14 Replace the liner if: 1. a heavy polish is present over 20 percent of the piston ring travel area. 2. thirty percent (30%) of the piston ring travel area has both moderate and heavy polish, and one-half (15 percent) is heavy polish. Refer to Parts Reuse Guidelines, Bulletin No. 3810303, for further information.
Cylinder Block N14 Pistons - Cleaning and Inspection (01-07) Page 1-41 Cylinder Liner Flange Thickness mm in Standard 9.01 MIN 0.355 9.04 MAX 0.356 Oversize 9.52 9.55 MIN MAX 0.375 0.376 Pistons - Cleaning and Inspection (01-07) Cleaning Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury. Caution: Do not use the glass bead blast method to clean the pistons.
Pistons - Cleaning and Inspection (01-07) Page 1-42 Cylinder Block N14 Inspection Visually inspect the piston bowl, the pin bore, and the skirt for cracks or damage. Use crack detection kit, Part No. 3375432, or equivalent to check for cracks on the top of the piston and in the piston pin bore. NOTE: Do not use pistons with dome cracks larger than one-half (1/2) the rim width or with cracks which extend over the rim toward the ni-resist insert.
Cylinder Block N14 Connecting Rod Assemblies - Cleaning and Inspection (01-08) Page 1-43 Measure the piston pin bore when the piston temperature is at 21°C [70°F] in two places 90 degrees apart. mm 63.504 63.530 Piston Pin Bore MIN MAX in 2.500 2.5012 NOTE: Add 0.013 mm [0.0005-inch] to the bore inside diameter per 5°C [10°F] temperature rise up to 32°C [90°F]. Visually inspect the piston pin for scratches, grooves, or other damage. Do not reuse if visually unacceptable.
Connecting Rod Assemblies - Cleaning and Inspection (01-08) Page 1-44 Cylinder Block N14 Inspection Visually inspect the connecting rod and the cap for fretting damage on the mating surfaces. The rod and the cap must be replaced as an assembly if any fretting damage is visible on either piece. Visually inspect the ring dowels for cracks or damaged areas. Replace if necessary. Refer to Connecting Rod Ring Dowel - Removal later in this section. Inspect the rods and the caps for damage.
Cylinder Block N14 Connecting Rod Assemblies - Cleaning and Inspection (01-08) Page 1-45 Visually inspect the capscrew threads for damage. Visually inspect under the capscrew heads for cracks. Measure the capscrew outside diameters. Connecting Rod Capscrew O.D. mm in 14.50 MIN 0.571 14.99 MAX 0.
Connecting Rod Assemblies - Cleaning and Inspection (01-08) Page 1-46 Cylinder Block N14 Measure the connecting rod bearing bore inside diameter. Connecting Rod Crankshaft Bore I.D. mm in 93.731 MIN 3.6902 93.769 MAX 3.6917 If any of the measurements are not within the specifications, the rod must be repaired or replaced. Measure the piston pin bushing inside diameter. mm 63.525 63.581 Piston Pin Bushing I.D. MIN MAX in 2.5010 2.
Cylinder Block N14 Connecting Rod Ring Dowels - Removal Caution: Do not damage the surface or the ring dowel hole during removal of the dowel. Use pliers or locking pliers to remove the damaged ring dowels. Use a blunt punch, if necessary, to bend the ring in for removal. Connecting Rod Ring Dowels - Installation Caution: Do not use a hammer or damage to the dowel will result. Use a plastic mallet to install the ring dowel.
Connecting Rods - Bend and Twist Inspection (01-09) Page 1-48 Cylinder Block N14 Install the connecting rod into the fixture. Move the dial holder to position the contact points of the indicators on the mandrel in the piston pin bore. Tighten the bracket to hold the indicators in position. Set the dial indicators to read ‘‘0.’’ Remove the connecting rod from the fixture. Turn the rod 180 degrees horizontally, and install the rod into the fixture again.
Cylinder Block N14 Connecting Rod Bearings - Cleaning and Inspection (01-10) Page 1-49 Measure the rod length and bend (alignment). mm 304.75 304.80 Connecting Rod Length in MIN 11.998 MAX 12.000 Connecting Rod Alignment mm in Bushing Removed 0.25 MAX 0.010 Bushing Installed 0.10 MAX 0.004 Twist - Inspection Using a feeler gauge, check the clearance between the mandrel and the dial indicator holding plate as shown. Connecting Rod Twist mm Bushing Removed 0.50 MAX Bushing Installed 0.25 MAX in 0.
Connecting Rod Bearings - Cleaning and Inspection (01-10) Page 1-50 Cylinder Block N14 NOTE: If large areas of copper lining are visible in the bearings before the engine has accumulated 241,000 kilometers [150,000 miles] or 3,750 hours, inspect the engine for contamination from fine dirt particles; and correct the problem to prevent further engine damage. Normal bearing wear produces a smooth finish which will wear into the copper lining. Exposed copper does not always indicate worn bearings.
Cylinder Block N14 Crankshaft Adapter - Cleaning and Inspection (01-11) Page 1-51 Crankshaft Adapter - Cleaning and Inspection (01-11) Cleaning Warning: When performing the following procedures, wear eye protection. Also, the wire brush must be rated for the RPM being used if the brush is motor driven. Use an emery cloth or a steel wire brush. Clean the inside and the outside diameters of the adapter. Use solvent to clean the adapter. Dry with compressed air.
Crankshaft Pulley - Cleaning and Inspection (01-12) Page 1-52 Cylinder Block N14 Measure the outside pilot diameter. mm 35.013 35.052 Outside Pilot Diameter MIN MAX in 1.3785 1.3800 Crankshaft Pulley - Cleaning and Inspection (01-12) Cleaning Warning: When performing the following procedures, wear eye protection. Also, the wire brush must be rated for the RPM being used if the brush is motor driven. Use an emery cloth or a steel wire brush.
Cylinder Block N14 Measure the inside diameter. Spun Steel Crankshaft Pulley I.D. mm in 35.08 MIN 1.381 35.18 MAX 1.385 Vibration Damper - Cleaning and Inspection (01-13) Cleaning Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury. Steam clean and dry with compressed air. Check the mounting web for cracks. Check the housing for dents or raised surfaces. Replace the damper if any of these defects are identified.
Crankshaft - Cleaning and Inspection (01-14) Page 1-54 Cylinder Block N14 Inspection Caution: Always wear protective gloves when handling heated parts. Personal injury can result. Apply a spray of spot check developer, type SKD-NFT, or its equivalent, to the damper. Put the damper (seam side down) into an oven heated to 93°C [200°F] for 2 hours. Remove the damper from the oven, and visually inspect for oil leaks.
Cylinder Block N14 Use a bristle brush, Part No. ST-876, and solvent to clean all the oil drillings. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury. Steam clean the crankshaft and dry it with compressed air. NOTE: Make sure to blow out the threaded holes on each end of the crankshaft and the oil drillings. Inspection Visually inspect the machined surfaces for scratches or nicks.
Crankshaft - Cleaning and Inspection (01-14) Page 1-56 Cylinder Block N14 NOTE: A maximum of 50 percent of the threaded holes per crankshaft end can be repaired. Visually inspect the crankshaft gear for cracks and broken or chipped teeth. Where the front and the rear crankshaft seals contact the crankshaft, the maximum allowable wear is 0.13 mm [0.005 in]. mm 0.13 Crankshaft Oil Seal Wear Groove MAX in 0.005 Measure the crankshaft gear fit area outside diameter (if the gear has been removed).
Cylinder Block N14 Measure the front oil seal area outside diameter. Crankshaft Front Oil Seal Area O.D. mm in 92.07 MIN 3.625 92.10 MAX 3.626 Measure the rear oil seal area outside diameter. Crankshaft Rear Oil Seal Area O.D. mm in 152.336 MIN 5.9975 152.40 MAX 6.000 Crankshafts which are ground oversize in the thrust face width are normally marked on the rear counterweight.
Crankshaft - Cleaning and Inspection (01-14) Page 1-58 Cylinder Block N14 Measure the main bearing journals outside diameter. Crankshaft Main Bearing Journal O.D. mm in 114.236 MIN 4.4975 114.300 MAX 4.5000 Measure the thrust face width. mm 76.23 76.35 Crankshaft Thrust Face Width MIN MAX in 3.001 3.006 The crankshaft can be ground undersize if the bearing journals or the thrust distance is not within specifications. Always grind all the journals when one is not within specifications.
Cylinder Block N14 Use clean 15W-40 oil to lubricate the entire crankshaft to prevent rust. Crankshaft Gear - Replacement (01-15) Removal Only remove the gear when the crankshaft or the gear is damaged. Use a puller jaw, Part No. 3375839, and gear puller assembly, Part No. 3375834. NOTE: The crankshaft gear puller kit, Part No. 3375840, contains the gear puller jaw and the bridge assemblies required for all Cummins engine models. Install the puller jaw and the bridge assembly.
Crankshaft Gear - Replacement (01-15) Page 1-60 Cylinder Block N14 Visually inspect the crankshaft gear fit area for burrs or damage. Use a fine crocus cloth to remove the burrs. Inspection Visually inspect the crankshaft gear for cracks and broken or chipped teeth. Visually inspect the gear and the keyway for nicks or burrs. Use a fine crocus cloth to remove any nicks and burrs. Measure the crankshaft gear bore. mm 95.394 95.415 Crankshaft Gear Bore I.D. MIN MAX in 3.7557 3.
Cylinder Block N14 Measure the crankshaft gear fit area outside diameter. Crankshaft Gear Fit Area O.D. mm in 95.501 MIN 3.7599 95.522 MAX 3.7607 Installation Use a plastic mallet to install a new key in the crankshaft keyway. Use LubriplateT No. 105 or its equivalent to lubricate the outside diameter of the crankshaft gear journal. Caution: Do not exceed the specified time or temperature. The crankshaft gear and the teeth can be damaged.
Crankshaft Bearings - Cleaning and Inspection (01-16) Page 1-62 Cylinder Block N14 Caution: Always wear protective gloves when handling heated parts. Personal injury can result. Caution: The timing mark (1) and the part number (2) on the gear must be facing away from the crankshaft after the gear is installed. Engine damage can result if the gear is installed backwards. Remove the gear from the oven. Align the keyway of the gear with the key in the crankshaft, and install the gear within 30 seconds.
Cylinder Block N14 Camshaft - Cleaning and Inspection (01-17) Page 1-63 NOTE: Oversize bearing shells are available for crankshafts which are 0.25 mm [0.010-inch], 0.51 mm [0.020-inch], 0.76 mm [0.030-inch], or 1.02 mm [0.040-inch] undersize. Bearing shells are identified by steel stamped characters on the back of the bearings to indicate either standard or the amount of oversize. Thrust Bearings - Inspection Visually inspect the thrust bearings for cracks or damage at the locating notch.
Camshaft - Cleaning and Inspection (01-17) Page 1-64 Cylinder Block N14 NOTE: After the camshaft has been steam cleaned, do not touch the machined surfaces with bare hands. This will cause rust to form. Lubricate the camshaft with clean 15W40 oil before handling. Inspection Visually inspect the valve and injector lobes for damage. NOTE: Cummins Engine Company, Inc. does not recommend repairing camshafts by grinding the valve or injector lobes. If the camshaft is damaged, it must be replaced.
Cylinder Block N14 Measure the seven camshaft bushing journals. Camshaft Bushing Journal O.D. mm in 63.37 MIN 2.495 63.42 MAX 2.497 Replace the camshaft if the journal dimensions do not meet specifications. Measure the camshaft thrust washer. Camshaft Thrust Washer Thickness mm in 2.29 MIN 0.090 2.49 MAX 0.098 Replace the thrust washer if it does not meet specifications. In an assembled engine, the camshaft end clearance must be 0.20 mm to 0.33 mm [0.008-inch to 0.013-inch].
Camshaft Gear - Replacement (01-18) Page 1-66 Cylinder Block N14 Caution: Do not use a heating torch to remove the gear. If you use a heating torch, a new gear must be installed. Push the shaft from the gear. NOTE: If the camshaft key is marked with an arrow, record the direction the arrow on the key is pointed (toward or away from the camshaft) for future reference. Use a flat chisel and a hammer to remove the camshaft key. Record the size (amount of offset) and the part number of the key.
Cylinder Block N14 Camshaft Gear - Replacement (01-18) Page 1-67 Measure the gear bore. Camshaft Gear Bore I.D. mm Flangeless 45.662 MIN Camshaft 45.682 MAX in 1.7977 1.7985 Replace the camshaft gear if it does not meet specifications. Caution: If the area of fretting is longer than a 3.175 mm [0.125-inch] wide longitudinal band, do not use the camshaft. Fretting or damage can result in gear movement on the camshaft nose and can cause camshaft nose failure.
Camshaft Gear - Replacement (01-18) Page 1-68 Camshaft Keys Change in Push Rod Travel At 3/4 Inch Key Offset Timing 19°BTDC Part No. mm [Inch] Change mm [Inch] 3021601 None None None 3021595 0.15 [0.0060] Retard 0.07 [0.0030] 3021593 0.19 [0.0075] Retard 0.09 [0.0037] 3021592 0.29 [0.0115] Retard 0.14 [0.0057] 3021594 0.47 [0.0185] Retard 0.23 [0.0092] 3021596 0.65 [0.0255] Retard 0.32 [0.0127] 3021598 0.79 [0.0310] Retard 0.39 [0.0155] 3021597 0.99 [0.0390] Retard 0.49 [0.0195] 3021600 1.30 [0.
Cylinder Block N14 Caution: Wear protective gloves when handling parts that have been heated to prevent personal injury. Heat the gear in an oven at 260°C [500°F] for a minimum of 1 hour. Remove the gear from the oven. NOTE: Install the gear on the camshaft within 30 seconds after it is removed from the oven. Caution: The timing marks and the part number on the gear must be facing away from the camshaft when the gear is installed to prevent engine damage.
Gear Cover - Cleaning and Inspection (01-19) Page 1-70 Cylinder Block N14 Remove the straight thread o-ring plug. Caution: The aluminum gasket surface can be easily damaged if caution is not used when removing gasket material. An oil leak will result. Use a gasket scraper to remove all gasket material. Use a medium crocus cloth to remove burrs from the capscrew holes and the gasket surface. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield.
Cylinder Block N14 Gear Cover - Cleaning and Inspection (01-19) Page 1-71 Measure the accessory drive seal bore. Accessory Drive Seal Bore I.D. mm in 80.962 MIN 3.1875 81.038 MAX 3.1905 NOTE: Replace the gear cover if the accessory drive seal bore is not within specifications. Measure the crankshaft seal bore. mm 120.611 120.688 Crankshaft Seal Bore I.D. MIN MAX in 4.7485 4.7515 NOTE: Replace the gear cover if the crankshaft seal bore is not within specifications.
Rear Cover - Cleaning and Inspection (01-20) Page 1-72 Cylinder Block N14 Measure the gear cover accessory drive bushing bore. Accessory Drive Bushing Bore I.D. mm in 43.07 MIN 1.696 43.10 MAX 1.697 NOTE: Replace the gear cover if the bore is not within specifications or if the bore is cracked or damaged. Use gear cover bushing mandrel, Part No. ST-598, to install a new accessory drive bushing. Align the oil hole (1) in the bushing with the oil drilling in the front cover.
Cylinder Block N14 Rear Cover - Cleaning and Inspection (01-20) Page 1-73 Cleaning Remove the gasket material from the rear cover gasket sealing surface. Use solvent to clean the rear cover. Dry with compressed air. Inspection Inspect the rear cover for cracks or other damage. Measure the rear cover crankshaft seal bore. mm 171.40 171.50 Crankshaft Seal Bore I.D. MIN MAX in 6.748 6.752 Replace the rear cover if the crankshaft seal bore is not within specifications.
Magnetic Crack Inspection (01-21) Page 1-74 Cylinder Block N14 Magnetic Crack Inspection (01-21) Refer to the Alternate Repair Manual, Bulletin No. 3379035, for procedures to magnetically check for cracks in the crankshafts, camshafts, connecting rods, gears, and capscrews.
Cylinder Head N14 Page 2-1 Section 2 - Cylinder Head - Group 02 Section Contents Page Cylinder Head - Cleaning and Inspection for Reuse ........................................................................................ 2-8 Cleaning ........................................................................................................................................................ 2-8 Inspection ........................................................................................................
Cylinder Head - Service Tools Page 2-2 Cylinder Head N14 Cylinder Head - Service Tools The following special tools are recommended to perform procedures in Group 02. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Valve Seat Insert Tool Cut valve seat counterbores for oversize valve seat inserts.
Cylinder Head N14 Cylinder Head - Service Tools Page 2-3 Tool No. Tool Description Fuel Passage Cleaning Brush Clean the internal fuel passages in the cylinder head. ST-876 Injector Sleeve Expander ST-880 Roll and seal the upper portion of the injector sleeve in the cylinder head. Injector Seat Cutter ST-884 Used to machine the injector sleeve seat to the correct depth to allow the specified injector protrusion through the cylinder head.
Cylinder Head - Service Tools Page 2-4 Tool No. Cylinder Head N14 Tool Description Injector Sleeve Holding Tool ST-1179 Hold the injector sleeve in place when rolling the upper portion of the sleeve and testing the cylinder head. Injector Sleeve Driver Drive the injector sleeve into the cylinder head. ST-1227 Injector Sleeve Puller Remove the injector sleeves from the cylinder head. ST-1244 Valve Vacuum Tester ST-1257 A vacuum test to determine if the valves are correctly seated in the cylinder head.
Cylinder Head - Exploded View Page 2-6 Cylinder Head N14 Cylinder Head - Exploded View Reference No. 1 2 3 4 5 6 7 8 9 10 11 12 Description Head Cylinder Plug, Expansion Seal, O-ring Sleeve, Injector Guide, Valve Stem Seal Stem Spring, Valve Retainer, Valve Spring Collet, Valve Spring Retainer Crosshead, Valve Capscrew, Cylinder Head Washer, Plain Quantity 3 24 6 6 24 24 24 24 48 12 36 36 Reference No.
Cylinder Head N14 Cylinder Head - General Information Page 2-7 Cylinder Head - General Information The cylinder head group consists of the cylinder head, valves, valve guides, valve springs, stem seals, valve seat inserts, cylinder head capscrews, fuel crossover, collets, spring retainer, crossheads, and the injector sleeves. The exhaust valves are manufactured from a material that is capable of operating at a higher temperature than the intake valves.
Cylinder Head - Cleaning and Inspection for Reuse (02-01) Page 2-8 Cylinder Head N14 Cylinder Head - Cleaning and Inspection for Reuse (02-01) Cleaning Steam clean the cylinder heads, and dry with compressed air. Blow out all capscrew holes, fuel passages, and oil passages. Remove the gasket material from the rocker lever housing surface. Use a gasket scraper to remove the heavy dirt and debris from the cylinder head gasket surface and the exhaust manifold gasket surface.
Cylinder Head N14 Cylinder Head - Cleaning and Inspection for Reuse (02-01) Page 2-9 Clean with solvent, and dry with compressed air. Inspection Visually inspect the fuel drillings and the water passages for restrictions or foreign material. Remove any obstructions. Visually inspect the valves and the valve springs for cracks, bent or broken valve stems, broken valve springs, or other damage. NOTE: If cracked or damaged parts are found, the cylinder head must be rebuilt.
Cylinder Head - Rebuild (02-02) Page 2-10 Cylinder Head N14 Visually inspect the cylinder head casting for cracks or damage. NOTE: If cracks or leaks in the cylinder head are suspected, refer to Cylinder Head - Pressure Testing (02-08). Visually inspect the valves for indications of leakage or burning. If indications of leakage or burning are found, the valves and the seats must be replaced or resurfaced. Refer to Cylinder Head - Rebuild (02-02).
Cylinder Head N14 Use a pencil magnet to remove the valve collets. Discard the valve collets. Slowly release the pressure on the valve spring. Remove the valve spring retainer. Remove the valve spring(s). Remove the valve stem seal. Remove the valves. NOTE: Mark the location of the valves with an engraving tool as they are removed. The intake and exhaust valves are manufactured from different materials. The exhaust valves can be installed in the intake valve location.
Cylinder Head - Rebuild (02-02) Page 2-12 Cylinder Head N14 Cleaning Warning: Use protective measures to prevent personal injury. Install the cylinder head and the parts in a tank of cleaning solution. NOTE: Follow the cleaning solution manufacturer’s instructions when cleaning the parts. Remove the cylinder head and parts from the cleaning tank. Use fuel passage cleaning brush, Part No. ST-876, to clean the fuel and the oil passages with solvent. Dry with compressed air.
Cylinder Head N14 Cylinder Head - Rebuild (02-02) Page 2-13 Use a straight edge and a 0.003-inch feeler gauge to measure the flatness of the cylinder head gasket surface. Flatness Per 25.4 mm [1.00 in] of Length mm in 0.020 MAX 0.0008 mm 0.08 Flatness Per Total Overall Length in 0.003 MAX NOTE: If the cylinder head is worn more than the maximum specified above, the cylinder head must be resurfaced. Refer to the Alternative Repair Manual, Bulletin No. 3379035.
Cylinder Head - Rebuild (02-02) Page 2-14 Cylinder Head N14 Use valve spring tester, Part No. 3375182, to measure the valve spring load at the valve spring working height. Valve Spring Part No. 3070460 Working Height (B) mm 56.89 Limit Nominal Load for Working Height (C) Valve Spring Part No. N Limit 3070460 1067 MIN 1156 MAX in. 2.240 lbf 240 260 NOTE: If the valve spring load for the working height is less than the minimum specified, the valve spring(s) must be replaced.
Cylinder Head N14 Cylinder Head - Rebuild (02-02) Page 2-15 Use the N14 valve head checking tool to measure the head thickness of the valves. NOTE: Install the valve on the tool with the valve head contacting the tool as shown. If the valve head is even with, or extends beyond the end of the tool, the valve can be reground. If the valve head is below the end of the tool, the valve is not thick enough for regrinding.
Cylinder Head - Rebuild (02-02) Page 2-16 Cylinder Head N14 Measure the width of the valve seat area of the valve seat inserts. mm 1.60 3.18 Valve Seat Area (Width) MIN MAX in 0.063 0.125 NOTE: If the valve seat area is worn wider than the maximum specified, refer to ‘‘Grinding the Valve Seats’’ later in this procedure or to Cylinder Head - Replacing the Valve Seat Inserts (02-05).
Cylinder Head N14 Remove the injectors from the cylinder head and check the pattern of the blueing compound in the injector sleeve. The blueing pattern in the injector seating area (1) must be visible 360 degrees around the seating area. The injector bore seating width (2) must be a minimum of 1.52 mm [0.060-inch]. NOTE: If the injector protrusion is more than the maximum specified or if the injector sleeve blueing pattern does not meet the specifications given, the injector sleeve(s) must be replaced.
Cylinder Head - Rebuild (02-02) Page 2-18 Cylinder Head N14 Hold the drive unit in a vertical position, and use an up-and-down movement of 12.7 mm [0.50-inch] travel and light pressure to grind the insert. Remove the grinder unit from the arbor. Install eccentrimeter gauge (4), Part No. ST-685-4, on the arbor. Measure the valve seat to valve guide concentricity. mm 0.09 Concentricity (Per 360 Degrees) MAX in 0.
Cylinder Head N14 If the valve protrusion is out of limits, replace the old valve (A) with a new valve (B) before replacing the valve seat. If the protrusion is within limits with the new valve, proceed using the new valve with the old seat. If the valve protrusion is still out of limits, even with the new valve (B), replace valve seat (C) with a new valve seat (D). After replacing the seat, check the valve protrusion again with the old valve (A) to determine if it can be reused.
Cylinder Head - Rebuild (02-02) Page 2-20 Cylinder Head N14 Remove the valve, and measure the valve seat width and the seat contact area as indicated by the broken lines. The pencil or Dykem marks will be worn away where the valve contacted the seat. mm 1.60 3.18 Valve Seat Width Limit MIN MAX in 0.063 0.125 Grind area (A) with a 60-degree stone and area (B) with a 15-degree stone to center the seat on the valve face and to obtain the valve seat width limits.
Cylinder Head N14 Cylinder Head - Rebuild (02-02) Page 2-21 After grinding the valve seats, use a bristle brush to clean the inside diameter of the valve guides. Use solvent to clean the cylinder head. Dry with compressed air. Assembly Apply cup plug sealant, Part No. 3375068, to the outside diameter of the expansion plugs. Use expansion plug drivers to install the expansion plugs in the cylinder head. Refer to the chart below. Cup Plug Size 3/4-inch 1 inch Driver Tool No.
Cylinder Head - Rebuild (02-02) Page 2-22 Cylinder Head N14 Use valve spring compressor, Part No. ST-448, or its equivalent (refer to the Service Tools list) to compress the valve springs. Install the new valve spring retainer collets. NOTE: Use new valve spring retainer collets when rebuilding the cylinder head. Use a mallet to gently hit the valve stems to make sure the valve collets are correctly seated in the spring retainer. Use valve vacuum tester, Part No.
Cylinder Head N14 Cylinder Head - Rebuild (02-02) Page 2-23 Visually inspect the cylinder head capscrews for damaged threads, corroded surfaces, or a reduced diameter (due to capscrew stretching). NOTE: Do not reuse a capscrew that has damaged threads or a reduced diameter from having been stretched. Do not reuse cylinder head capscrews under the following conditions: • Visible corrosion or pitting exceeds 1 sqcm [0.155 sq. inch] in area.
Cylinder Head - Rebuild (02-02) Page 2-24 Cylinder Head N14 The capscrews can be checked using a set of calipers if service tool, Part No. 3823546, is not available. The maximum allowable free length (dimension ‘X’), measured from the bottom of the flange to the end of the capscrew, is 185.6 mm [7.130 in]. To check the capscrew free length, place the head of the capscrew in the appropriate slot with the flange against the base of the slot. NOTE: Capscrew length must be checked without the hardened washer.
Cylinder Head N14 Cylinder Head - Replacing the Valve Guides (02-03) Page 2-25 Immediately after cleaning and inspecting, apply a film of clean engine lubricating oil to capscrews that are to be used again. Cylinder Head - Replacing the Valve Guides (02-03) Disassembly Use a valve guide driver, Part No. 3376398, (1) and an arbor press to remove the old valve guides (2). Cleaning Use a flexible brush and solvent to clean the valve guide bores in the cylinder head. Dry with compressed air.
Cylinder Head - Replacing the Valve Guides (02-03) Page 2-26 Cylinder Head N14 Assembly Measure the outside diameter of the new valve guides. mm 19.088 19.101 Valve Guide O.D. in 0.7515 0.7520 MIN MAX NOTE: Oversize valve guides have identification grooves on the outside diameter of the guide. The 0.25 mm [0.010-inch] oversize guide has one groove. The 0.38 mm [0.015-inch] oversize guide has two grooves. Use valve guide driver (1), Part No.
Cylinder Head N14 Cylinder Head - Ring Dowel Replacement (02-04) Removal Caution: Do not damage the surface or the ring dowel hole during removal of the dowel. Use a pliers or a locking pliers to remove the damaged ring dowel. Use a blunt punch, if necessary, to bend the ring in for removal. Installation Caution: Do not use a hammer or damage to the dowel will result. Use a plastic mallet to install the ring dowel.
Cylinder Head - Replacing the Valve Seat Inserts (02-05) Page 2-28 Cylinder Head N14 Inspection Visually inspect the insert bore for cracks or damage. NOTE: If cracks or damage are found, it is possible to repair the cylinder head by machining the insert bore for oversize valve seat inserts. Refer to the Alternative Repair Manual, Bulletin No. 3379035. Measure the valve seat insert bore depth in the cylinder head. Insert Bore Depth (Standard Insert) mm in 9.39 MIN 0.370 9.52 MAX 0.
Cylinder Head N14 Use valve seat grinding machine, Part No. ST-685, and valve guide arbor set, Part No. ST-663, to grind the new valve seat inserts. Refer to ‘‘Grinding the Valve Seats’’ under Cylinder Head - Rebuild (02-02). Cylinder Head - Grinding the Valves (02-06) Cleaning Use Scotch-BriteT 7448, Part No. 3823258, to clean the valve stems. Clean the carbon deposits from the valve face and the head. NOTE: The valves must be clean and free of carbon deposits before they are ground.
Cylinder Head - Grinding the Valves (02-06) Page 2-30 Cylinder Head N14 Inspection Use the N14 valve head checking tool to measure the head thickness of the valve. NOTE: If the valve head is below the end of the tool, the valve must be replaced. If a valve checking tool is not available, put the valve on a flat surface and measure the head thickness (1) at the outside diameter. mm 2.90 Head Thickness (at O.D.) MIN in 0.
Cylinder Head N14 Cylinder Head - Replacing the Injector Sleeves (02-07) Page 2-31 Cylinder Head - Replacing the Injector Sleeves (02-07) Disassembly Use an injector sleeve puller, Part No. ST-1244, to remove the injector sleeves from the cylinder head. Install the puller in the injector sleeve with the legs of the bridge against the cylinder head. Install the driver, Part No. ST-1244-8, against the large nut on the puller as shown.
Cylinder Head - Replacing the Injector Sleeves (02-07) Page 2-32 Cylinder Head N14 If the grooves (steps) are damaged or mutilated, use a pilot, Part No. ST-884-6; holder, Part No. ST-884-1; and cutting tool, Part No. ST-788, to machine the grooves (steps) in the bottom of the injector bore. Install the bead cutting tool and the cylinder head in a drill press. Set drill press speed at not more than 75 RPM. Use a cutting oil to lubricate the cutter head.
Cylinder Head N14 Cylinder Head - Replacing the Injector Sleeves (02-07) Page 2-33 Use an injector sleeve expander, Part No. ST-880, to expand the upper section of the injector sleeve. Adjust the expander roller edge (1) and the collar (2) to the clearance specified. Clearance: 40 mm [1.6 inches] The rollers on the sleeve expander must extend 13 mm to 15 mm [0.5-inch to 0.6-inch] below the top of the injector sleeve. Do not extend the rollers more than 15 mm [0.6-inch] below the top of the sleeve.
Cylinder Head - Replacing the Injector Sleeves (02-07) Page 2-34 Cylinder Head N14 Caution: Support the cylinder head to prevent damage to the injector tip that protrudes from the combustion face. Apply a very light film of blueing compound to the outside diameter of the injector at the injector seat area. Blueing compound can effectively be applied with your finger or with a brush. Install the injector in the cylinder head without o-rings. Place a 1.2-inch thick block under the injector hold down clamp.
Cylinder Head N14 The blueing pattern in the injector seating area (1) must be visible 360 degrees around the seating area. The injector bore seating width (2) must be a minimum of 1.52 mm [0.060-inch]. NOTE: If the injector protrusion is more than the maximum specified or if the injector sleeve blueing pattern does not meet the specifications given, the injector sleeve(s) must be replaced. Refer to Cylinder Head - Replacing the Injector Sleeves (02-07).
Cylinder Head - Pressure Testing (02-08) Page 2-36 Cylinder Head N14 Tighten the injector sleeve holding tool capscrew. Torque Value: 5 N•m [45 in-lb] 10 N•m [90 in-lb] 15 N•m [130 in-lb] Install the cylinder head in a hydrostatic tester, Part No. ST-1012, and a hydrostatic tester adapter plate, Part No. ST-1013. Connect a regulated air supply hose to the test fixture plate. Apply 275 kPa [40 psi] air pressure. Use a hoist to put the cylinder head in a tank of warm water heated to 60°C [140°F].
Cylinder Head N14 Remove the test equipment. Dry the cylinder head with compressed air. Assemble the cylinder head. Refer to ‘‘Assembly’’ under Cylinder Head - Rebuild (02-02). A. Valve B. Valve Stem Seal C. Valve Spring D. Valve Spring Retainer E. Collets Cylinder Head - Magnetic Particle Checking (02-09) Caution: The cylinder head must be thoroughly cleaned after using the magnetic crack detector, Part No. ST1166, so that all iron fragments are removed. Use the magnetic crack detector, Part No.
Cylinder Head - Vacuum Testing Valve Seating for Reuse (02-10) Page 2-38 Cylinder Head N14 Lightly spray the metal powder onto the combustion surface. Use compressed air regulated to 205 kPa [30 psi] to remove excess powder from the area. The powder will remain if there are any cracks and will appear as a white line. Visually inspect the cylinder head for cracks in the combustion face.
Cylinder Head N14 Cylinder Head - Vacuum Testing Valve Seating for Reuse (02-10) Page 2-39 Install the seal ring, Part No. 3823848, and the vacuum cup, Part No. 3823847, to the vacuum hose. NOTE: The valves and the valve seats must be clean and dry when vacuum testing. Cover the valve with the cup and the seal. NOTE: The seal must make a tight contact on the cylinder head around the valve. The seal must completely fill the two milled areas between the valves.
Cylinder Head - Valves - Magnetic Crack Inspection (02-11) Page 2-40 Cylinder Head N14 Use a stopwatch. Start timing when the needle on the gauge indicates 457 mm-Hg [18 in.Hg]. Stop timing when the needle on the gauge indicates 203 mm Hg [8 in.Hg]. The elapsed time for the needle to move between the specified gauge readings must be 10 seconds or more. If the elapsed time is less than 10 seconds, perform the following checks: • Repeat the test to make sure the equipment is operating correctly.
Cylinder Head N14 Valve Crosshead - Cleaning and Checking for Reuse (02-12) Page 2-41 Valve Crosshead - Cleaning and Checking for Reuse (02-12) Cleaning Use solvent to clean the crosshead. Dry with compressed air. Inspection Visually inspect the rocker lever contact pad for wear, cracks, or damage. Visually inspect the valve stem contact areas for damage. Measure both valve stem pocket depths from the valve stem pocket to the rocker pad face (1). mm 11.53 12.55 Stem Pocket to Pad Face MIN MAX in 0.
Valve Crosshead - Magnetic Crack Inspection (02-13) Page 2-42 Cylinder Head N14 Valve Crosshead - Magnetic Crack Inspection (02-13) Refer to the Alternate Repair Manual, Bulletin No. 3379035, for procedures to magnetically check for cracks in the valve crosshead.
Rocker Lever Housing Assembly N14 Page 3-1 Section 3 - Rocker Lever Housing Assembly - Group 03 Section Contents Page Metri-Pack Pass Through Connector - Replacement ..................................................................................... 3-21 Installation .................................................................................................................................................... 3-22 Removal...............................................................................
Rocker Lever Housing Assembly - Service Tools Page 3-2 Rocker Lever Housing Assembly N14 Rocker Lever Housing Assembly - Service Tools The following special tools are recommended to perform procedures in section 3. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Rocker Lever Block and Mandrel Set ST-691 Used to remove and install precision steel bushings in the rocker levers.
Rocker Lever Housing Assembly - Exploded View Page 3-4 Rocker Lever Housing Assembly N14 Rocker Lever Housing Assembly - Exploded View
Rocker Lever Housing Assembly N14 Rocker Lever Housing Assembly - Exploded View Page 3-5 Rocker Lever Housing Assembly - Exploded View Reference No.
Rocker Lever Housing Assembly N14 Rocker Lever Housing Assembly - General Information Page 3-7 Rocker Lever Housing Assembly - General Information The rocker lever housing assembly group consists of the rocker lever assembly, the step timing control (STC) oil manifold connector, external oil manifold, internal oil tube, and the rocker housing cover. The rocker levers contain replaceable bushings.
Rocker Lever - Cleaning and Inspection for Reuse (03-01) Page 3-8 Rocker Lever Housing Assembly N14 Rocker Lever - Cleaning and Inspection for Reuse (03-01) Disassembly Loosen the valve and injector adjusting screw lock nuts on each rocker lever. Turn the adjusting screws counterclockwise until the rocker levers are loose. Caution: Do not attempt to remove or install the rocker lever shaft assemblies without backing out the adjusting screws.
Rocker Lever Housing Assembly N14 Rocker Lever - Cleaning and Inspection for Reuse (03-01) Page 3-9 Visually inspect the shaft for cracks or damage. Light fretting is typically found on the underside of the shaft and is not harmful, provided it meets the dimensional specifications. Measure the rocker lever shaft’s outside diameter in the bushing wear area. mm 34.823 34.862 Rocker Lever Shaft O.D. MIN MAX in 1.3710 1.3725 Replace the rocker lever shafts as necessary.
Rocker Lever - Cleaning and Inspection for Reuse (03-01) Page 3-10 Rocker Lever Housing Assembly N14 Measure the rocker lever bushing bore inside diameter. Rocker Lever Bushing I.D. (Installed) mm in 34.89 MIN 1.3735 34.99 MAX 1.3775 NOTE: Replace the rocker lever bushings which are worn beyond the maximum limit. Refer to Rocker Lever Bushing - Replacement (03-02). Use steam or solvent to clean the rocker lever adjusting screw and nuts. Dry with compressed air.
Rocker Lever Housing Assembly N14 Rocker Lever - Cleaning and Inspection for Reuse (03-01) Page 3-11 Assembly Use clean 15W-40 oil to lubricate the threads of the adjusting screws. Install the adjusting screw and lock nut in each rocker lever. Do not tighten the lock nuts. Install the exhaust (1), injector (2), and intake (3) rocker levers onto the shaft. The two levers closest to the center of the rocker housing are the intake valve rocker levers.
Rocker Lever Bushing - Replacement (03-02) Page 3-12 Rocker Lever Housing Assembly N14 Place the rocker lever assembly over the dowel pin and dowel ring located in the rocker housing. NOTE: Do not damage the dowel pin and dowel ring located in the rocker housing. Make sure the push rods are in the cam follower sockets and align the push rods with the injector and valve rocker lever adjusting screws. Alternately tighten the rocker shaft capscrews in 54 N•m [40 ft-lb] increments to 156 N•m [115 ft-lb].
Rocker Lever Housing Assembly N14 Rocker Lever Bushing - Replacement (03-02) Page 3-13 Use a 240 grit, or finer, emery cloth to remove any rough edges or burrs from the bore of the rocker lever. Use solvent to clean the rocker levers. Dry with compressed air. Inspection NOTE: If cracks in the rocker lever are suspected, refer to Rocker Lever - Magnetic Crack Inspection (03-03). Measure the inside diameter of the rocker lever bore. mm 36.474 36.500 Rocker Lever Bore I.D. MIN MAX in 1.436 1.
Rocker Lever - Magnetic Crack Inspection (03-03) Page 3-14 Rocker Lever Housing Assembly N14 Install the bushing in the injector rocker lever with the split clinch joint toward the top of the lever. The ‘‘square hole’’ must be aligned with the oil hole to the adjusting screw. The ‘‘slot hole’’ must be aligned with the oil hole to the injector link socket. Use an arbor press and a rocker lever block and mandrel set, Part No. ST-691, to push the bushing into the rocker lever.
Rocker Lever Housing AssemblyRocker Lever Housing Assembly - Cleaning and Inspection for Reuse (03-05) N14 Page 3-15 Steam clean the reusable gaskets. Dry with compressed air, and check for cuts or deformations in the silicone bead. Replace the gasket if there are any cuts, abrasions, or deformations in the silicone bead. Check to see if the nylon carrier is cracked or broken; replace if necessary. NOTE: The reusable gaskets must not be cleaned with solvent.
Rocker Lever Housing Assembly - Cleaning and Inspection for Reuse (03-05)Rocker Lever Housing Assembly Page 3-16 N14 Use Scotch Brite 7448, Part No. 3823258, to clean the o-ring bores in the water manifold and the o-ring grooves in the o-ring plug and water tubes. Steam clean the o-ring plugs and water tubes. Dry with compressed air. Visually inspect the o-ring plugs and water tubes for cracks, pitting, corrosion, or other damage. Replace if necessary.
Rocker Lever Housing AssemblyRocker Lever Housing Assembly - Cleaning and Inspection for Reuse (03-05) N14 Page 3-17 Visually inspect the pass through connectors for cracks, bent contacts, or other damage. Replace if necessary. Refer to the N14 Troubleshooting and Repair Manual CELECT™ System, Bulletin No. 3810469. On STC engines, remove the oil manifold. NOTE: When removing the oil manifold connector from the rocker lever housing, use a wide flat pry bar. Pry at the center of the oil manifold.
Rocker Lever Housing Assembly - Cleaning and Inspection for Reuse (03-05)Rocker Lever Housing Assembly Page 3-18 N14 Visually inspect the rocker lever shaft dowel rings (1), the dowel pins (2), and the brass cup plug (3). Replace if necessary. Use service tool, Part No. 3823821, to remove the dowel pins and dowel rings. Refer to Ring and Pin Dowel Replacement (03-07). Installation Install two o-rings (1) on each of the two water tubes (2). Install one o-ring (1) on each of the two water plugs (3).
Rocker Lever Housing Assembly N14 STC Oil Plumbing - Cleaning and Inspection for Reuse (03-06) Page 3-19 STC Oil Plumbing - Cleaning and Inspection for Reuse (03-06) Remove the o-rings and discard. Clean the oil manifold connector, external oil manifold, and internal oil tube. Inspect the oil manifold connector for cracks, damage, or restrictions. Inspect the o-ring grooves on the connector for cracks or damage. Inspect the rocker lever housing for damage. Replace the oil manifold connector if necessary.
Ring and Pin Dowel - Replacement (03-07) Page 3-20 Rocker Lever Housing Assembly N14 Ring and Pin Dowel - Replacement (03-07) Removal Select the proper size ring dowel remover and insert the threaded end into the ring dowel to be removed. Tighten the hexagon nut until snug. Mount the slide hammer onto the dowel remover. Use the slide hammer to remove the ring dowel. To remove a 1/4-inch straight dowel, place the 6.35 mm [1/4-inch] dowel remover on the dowel to be removed.
Rocker Lever Housing Assembly N14 Metri-Pack Pass Through Connector - Replacement (03-08) Page 3-21 Tighten the hexagon nut to grip the dowel. Mount the slide hammer on the 1/4-inch dowel remover and pull the dowel. Installation Caution: Do not use a hammer or damage to the dowel will result. Use a mallet to install the ring dowels and pin dowels.
Metri-Pack Pass Through Connector - Replacement (03-08) Page 3-22 Rocker Lever Housing Assembly N14 Disconnect the actuator harness from the pass through connector. Remove the capscrew. Cut and remove the plastic wire tie that holds the actuator harness to the pass through connector. Pull the pass through from the rocker box housing. Disconnect the injector solenoid wires from the pass through connector. Installation Install the new pass through connector.
Cam Follower Assembly N14 Page 4-1 Section 4 - Cam Follower Assembly - Group 04 Section Contents Page Cam Follower Assembly - Cleaning and Inspection for Reuse ....................................................................... 4-5 Cleaning ........................................................................................................................................................ 4-5 Inspection .................................................................................................
Cam Follower Assembly - Service Tools Page 4-2 Cam Follower Assembly N14 Cam Follower Assembly - Service Tools The following special tools are recommended to perform procedures in section 4. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Cup Plug Sealant Use when installing cup plugs on engines to stop leaks.
Cam Follower Assembly N14 Cam Follower Assembly - Exploded View Page 4-3 Cam Follower Assembly - Exploded View Reference No. 1 2 3 4 5 6 7 8 9 Description Capscrew, Hexagon Head Capscrew, Hexagon Head Gasket, Cam Follower Housing Screw, Lock Plug, Expansion Housing, Cam Follower Shaft, Cam Follower Lever, Cam Follower Pin, Cam Follower Roller Qty. 7 11 3 6 6 3 6 12 12 Reference No.
Cam Follower Assembly - General Information Page 4-4 Cam Follower Assembly N14 Cam Follower Assembly - General Information The cam follower group consists of the injector cam followers, valve cam followers, cam follower shafts, cam follower housing, and the valve and injector push rods. The N14 uses the crowned roller design cam follower. This design has been used since November, 1982.
Cam Follower Assembly - Cleaning and Inspection for Reuse (04-01) Page 4-6 Cam Follower Assembly N14 Measure the cam follower roller side clearance. mm 0.23 0.61 Roller Side Clearance MIN MAX in 0.009 0.024 NOTE: If the roller side clearance is not within these specifications, the roller must be replaced. Refer to Cam Follower Lever - Roller Replacement (04-03). Use a dial indicator to measure the cam follower to roller pin clearance. mm 0.08 0.20 Roller to Pin Clearance MIN MAX in 0.003 0.
Cam Follower Assembly N14 Use clean 15W-40 oil to check the oil flow through the cam followers. Cam Follower Assembly - Rebuild (04-02) Disassembly Remove the two locking screws. NOTE: Each cam follower housing assembly consists of two shaft assemblies secured in a common center support with two locking screws. Caution: Do not push the cup plug through the cam follower lever shaft bores. The bores will be damaged. Use expansion plug driver, Part No. 3376813, and a mallet to remove the cup plugs.
Cam Follower Assembly N14 Cam Follower Assembly - Rebuild (04-02) Page 4-9 Use a dial indicator to measure the cam follower to roller pin clearance. mm 0.08 0.20 Roller to Pin Clearance MIN MAX in 0.003 0.008 NOTE: If the roller to pin clearance is not within these specifications, the roller and the pin must be replaced. Refer to Cam Follower Lever - Roller Replacement (04-03). Measure the cam follower lever shaft bore inside diameter. mm 22.228 22.276 Lever Shaft Bore I.D. MIN MAX in 0.8751 0.
Cam Follower Assembly - Rebuild (04-02) Page 4-10 Cam Follower Assembly N14 Use clean 15W-40 oil to check the oil flow through the cam followers. Clean the cam follower shafts with solvent. Dry with compressed air. Make sure the oil drillings are not restricted or plugged. Visually inspect the cam follower shafts for scoring or damage. Visually inspect the locking screw holes in each shaft. The grooves must be clean and not damaged. Measure the cam follower shaft outside diameter. mm 22.156 22.
Cam Follower Assembly N14 Cam Follower Assembly - Rebuild (04-02) Page 4-11 Steam clean the cam follower housings. Dry with compressed air. Visually inspect the cam follower housings for cracks or damage. Visually inspect the locking screw holes for damaged or distorted threads. Measure the cam follower shaft bore inside diameter. mm 22.200 22.225 Cam Follower Shaft Bore I.D. MIN MAX in 0.8740 0.
Cam Follower Lever - Roller Replacement (04-03) Page 4-12 Cam Follower Assembly N14 Install the levers and the shafts in the housings. NOTE: To prevent increased wear, install the cam follower levers and the shafts back in their original location in the housing. Install the cup plugs in the housings as follows: 1. Install two temporary capscrews in the shafts to prevent breaking the locking screws. 2. Put cup plug sealant, Part No. 3375068, on the cup plugs. 3. Use expansion plug driver (1), Part No.
Cam Follower Assembly N14 Install the cam follower lever into an arbor press. Caution: Use the largest feeler gauge that will fit between the roller and the lever to prevent leg deflection when removing the roller pin. This will reduce shaving of the bronze roller pin and prevent leg breakage. Install a feeler gauge between the roller and the leg of the lever. Push the roller pin from the cam follower lever. Discard the unacceptable rollers and all the roller pins.
Cam Follower Lever - Roller Replacement (04-03) Page 4-14 Cam Follower Assembly N14 Measure the inside diameter of the new cam follower lever roller bore. mm 12.776 12.801 Valve Lever Roller Bore I.D. MIN MAX in 0.5030 0.5040 Injector Lever Roller Bore I.D. mm in 19.151 MIN 0.7540 19.177 MAX 0.7550 Measure the outside diameter of the new cam follower roller. NOTE: The valve and the injector rollers are crowned. The crowned roller must be measured in the middle of the roller outside diameter. mm 31.
Cam Follower Assembly N14 Assembly NOTE: The roller pin must be installed correctly to make sure the cam follower roller and the roller pin are supplied with oil. Inspect the new roller pin as shown to determine the oil feed pass (1) and the alignment hole (2) locations. The oil feed passage is drilled approximately two-thirds of the way through the pin. The alignment hole is drilled completely through the pin.
Cam Follower Lever - Roller Replacement (04-03) Page 4-16 Cam Follower Assembly N14 Caution: The cam follower roller pin must be installed with the oil feed hole (1) positioned towards the top of the cam follower lever (2). NOTE: Freezing the roller pin will simplify its installation. Use clean 15W-40 oil to lubricate the roller pin. Install the roller pin.
Cam Follower Assembly N14 Cam Follower Socket - Replacement (04-04) Page 4-17 Measure the cam follower roller side clearance. mm 0.23 0.61 Roller Side Clearance MIN MAX in 0.009 0.024 NOTE: If the roller does not rotate freely or the clearance is not within specification, disassemble and check the roller pin and the lever for damage. The pin can not be used again. Cam Follower Socket - Replacement (04-04) NOTE: This procedure assumes that the roller is removed. Use a pin punch to remove the socket.
Push Rod - Cleaning and Inspection for Reuse (04-05) Page 4-18 Cam Follower Assembly N14 Caution: Support as shown to prevent cracks in the cam follower. An old roller can be used to support the lever. Use a brass drift or a used push rod end (2). Use an arbor press. Install the new socket. The socket must touch the bottom of the bore in the lever. Push Rod - Cleaning and Inspection for Reuse (04-05) Cleaning Use solvent to clean the push rods. Dry with compressed air.
Cam Follower Assembly N14 Visually inspect the socket end of the push rod for uneven wear, scratches, or separation of the insert from the tube. If a worn push rod is found, the mating adjusting screw must also be replaced. When parallel scratches are found in the contact area, the push rods must be replaced. Visually inspect the ball end of the push rod. The contact area must show a smooth seating pattern.
Fuel System N14 Page 5-1 Section 5 - Fuel System - Group 05 Section Contents Page Fuel Pump - Calibration ................................................................................................................................... 5-7 Fuel Pump Cleaning Cleaning Inspection Inspection Cleaning and Inspection for Reuse ............................................................................................. CELECT™ Fuel Pump .......................................................................
Fuel Pump - General Information Page 5-2 Fuel System N14 Fuel Pump - General Information NOTE: Warranty repairs are not to be made to the fuel pump unless the work is performed in a shop meeting all requirements established by Cummins Engine Company, Inc. to accurately calibrate, test, and repair the fuel systems on Cummins engines. The fuel pump is calibrated for a specified performance and will vary between engine application and model.
Fuel System N14 Fuel Pump - Cleaning and Inspection for Reuse (05-01) Page 5-3 Fuel Pump - Cleaning and Inspection for Reuse (05-01) When removing the fuel pump from step timing control (STC) engines, check to make sure the same Control Parts List (CPL) number is on both the fuel pump dataplate and the engine dataplate. If the CPL number on the fuel pump dataplate does not match the CPL number on the engine dataplate, the fuel pump must be calibrated again to the correct specification for the engine.
Fuel Pump - Cleaning and Inspection for Reuse (05-01) Page 5-4 Fuel System N14 Cleaning - CELECT™ Fuel Pump Install plastic cup plugs or tape on all openings of the fuel pump to prevent dirt or cleaning solvent from entering the pump. Remove the gasket material from the front cover gasket sealing surface. Caution: Use a cleaning solvent approved for cleaning aluminum to prevent damage to the fuel pump. Use a brush and solvent to clean the fuel pump exterior. Dry with compressed air.
Fuel System N14 Fuel Pump - Cleaning and Inspection for Reuse (05-01) Page 5-5 Visually inspect the drive coupling spider for cracks or other damage. Visually inspect the front cover pilot to make sure the pilot is continuous without cracks or gaps. Use clean 15W-40 oil to lubricate the tachometer drive gear. Turn the fuel pump shaft by hand. The shaft must rotate freely. NOTE: If the shaft does not rotate freely, the pump must be disassembled for further inspection. Refer to Fuel Pump Rebuild (05-02).
Fuel System N14 Visually inspect the fuel pump shutoff valve for loose or damaged electrical terminals. Fuel Pump - Rebuild (05-02) PT The disassembly, inspection, repair, assembly, and calibration procedures for the PT fuel pump are covered in PT Fuel Pump Rebuilding and Calibration Instructions, Bulletin No. 3379084.
Fuel Pump - Calibration (05-03) Page 5-8 Fuel System N14 The Control Parts List (CPL) Manual, Bulletin No. 3379133, is a listing of basic engine parts and timing specifications which are necessary to produce a given engine performance. By using the CPL number stamped on the engine dataplate and this manual, parts within the engine can be identified. These parts then determine whether a fuel pump calibration is correct for that engine.
Injectors and Fuel Lines N14 Section Contents Page 6-1 Section 6 - Injectors and Fuel Lines - Group 06 Section Contents Page Fuel Tubes, Fittings, and Mounting Parts - Cleaning and Inspection for Reuse ........................................... 6-9 Cleaning ........................................................................................................................................................ 6-9 Inspection ...................................................................................
Injectors and Fuel Lines N14 Reference No.
Injector - CELECT™ - Exploded View Page 6-4 Injectors and Fuel Lines N14 Injector - CELECT™ - Exploded View Reference No. 1 2 3 4 5 6 7 8 9 Description Link, Top Retainer, Link Retainer, Spring Spring, Compression Shim, Top Stop Shim, Bottom Stop Plunger, Timing Guide, Spring Spring, Bias Quantity 6 6 6 6 6 6 6 6 6 Reference No.
Injectors and Fuel Lines N14 Injectors - PT (type D) Step Timing Control (STC) - General Information Page 6-5 Injectors - PT (type D) Step Timing Control (STC) - General Information The step timing control (STC) system allows an engine to operate with advanced injection timing under light load conditions. STC allows the engine to operate with normal injection timing under heavy load conditions. The injectors used in N14 engines equipped with STC are PT (type D) STC full top stop style injectors.
Injectors - Cleaning the Exterior and Inspection for Reuse (06-01) Page 6-6 Injectors and Fuel Lines N14 Injectors - Cleaning the Exterior and Inspection for Reuse (06-01) Remove and discard the three injector o-rings. Cleaning - STC Use a clean, lint-free cloth to clean the exterior of the injectors. Use solvent to clean the injector plunger links. NOTE: STC injectors contain a tappet stop link, which is held in place by a plastic retaining clip.
Injectors and Fuel Lines N14 Injectors - Cleaning the Exterior and Inspection for Reuse (06-01) Page 6-7 Visually inspect the injector for carbon deposits on the injector cup and cup retainer. Visually inspect the o-ring grooves for damage. Visually inspect the injector body and cup retainer for cracks or other damage. Visually inspect the orifice screen for damage, contamination, or metal particles. NOTE: If damaged or contaminated parts are found, the injectors must be replaced or rebuilt.
Injectors - Rebuild (06-02) Page 6-8 Injectors and Fuel Lines N14 Injectors - Rebuild (06-02) The disassembly, inspection, repair, and calibration procedure for STC injectors are covered in Shop Manual PT (type D) Step Timing Control Injector, Bulletin No. 3810313. NOTE: CELECT™ injectors are presently not rebuildable in the field. Injectors - Calibration (06-03) The injector calibration specifications and parts information are provided in Injector Specifications, Bulletin No. 3379664.
Injectors and Fuel Lines Fuel Tubes, Fittings, and Mounting Parts - Cleaning and Inspection for Reuse (06-05) N14 Page 6-9 Fuel Tubes, Fittings, and Mounting Parts - Cleaning and Inspection for Reuse (06-05) Cleaning Use solvent to clean the fuel tubes, fittings, and parts. Dry with compressed air. Inspection Visually inspect the fuel tubes for cracks or locations where the tubing is crushed. Do not attempt to repair fuel tubing. Visually inspect the injector hold down clamps for cracks or other damage.
Lubricating Oil System N14 Page 7-1 Section 7 - Lubricating Oil System - Group 07 Section Contents Page Lubricating Oil Cooler - Exploded View............................................................................................................ 7-5 Lubricating Oil Cooler Assembly - Rebuild .................................................................................................... Assembly .......................................................................................................
Lubricating Oil System - Service Tools Page 7-2 Lubricating Oil System N14 Lubricating Oil System - Service Tools The following special tools are recommended to perform procedures in Group 07. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Spacer Mandrel Install the gear onto the lubricating oil pump shaft.
Lubricating Oil System N14 Lubricating Oil System - Exploded View Page 7-3 Lubricating Oil System - Exploded View Reference No.
Lubricating Oil Pump Assembly - Exploded View Page 7-4 Lubricating Oil System N14 Lubricating Oil Pump Assembly - Exploded View Reference No.
Lubricating Oil Cooler - Exploded View Page 7-6 Ref. No.
Lubricating Oil System N14 Lubricating Oil System - General Information Page 7-7 Lubricating Oil System - General Information The lubricating oil system group consists of the oil pan, the oil suction tube, the oil transfer tube assembly, the oil dipstick and oil gauge tube, the oil filter and cooler assembly, and the lubricating oil pump. Service replacement dipsticks do not have the high and low level marks indicated on the dipstick.
Lubricating Oil Pan - Cleaning and Inspection for Reuse (07-01) Page 7-8 Lubricating Oil System N14 Lubricating Oil Pan - Cleaning and Inspection for Reuse (07-01) Cleaning Remove all gasket material from the oil pan gasket sealing surface. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury. Use steam to clean the oil pan. Dry with compressed air. Inspection Visually inspect the oil pan for cracks or damage.
Lubricating Oil System N14 Lubricating Oil Transfer Tube - Cleaning and Inspection for Reuse (07-02) Page 7-9 Lubricating Oil Transfer Tube - Cleaning and Inspection for Reuse (07-02) Cleaning Use solvent to clean the lubricating oil transfer tube and the mounting flanges. Dry with compressed air. Inspection Visually inspect the tube and the flanges for cracks, corrosion, or other damage. NOTE: If cracks or damage are found, the transfer tube must be replaced.
Lubricating Oil Pump - Cleaning and Inspection for Reuse (07-05) Page 7-10 Lubricating Oil System N14 Remove the dipstick and scribe a mark across the dipstick. Mark the ‘‘LOW’’ level with an ‘‘L.’’ NOTE: The dipstick will break if the scribe mark is too deep. NOTE: Cut the new dipstick off approximately 38 mm [1.5 inches] below the ‘‘LOW’’ oil level mark. Install the dipstick into the dipstick tube housing. Use clean 15W-40 oil to fill the oil pan to the specified ‘‘HIGH’’ oil pan capacity level.
Lubricating Oil System N14 Lubricating Oil Pump - Rebuild (07-06) Page 7-11 Inspection Turn the main drive gear by hand to check the internal gears for freedom of rotation. Visually inspect the gears for cracked or broken teeth. Visually inspect the bushings for excessive wear or discoloration due to overheating or seizure of the shafts. Measure the drive shaft end clearance with a dial indicator located at the end of the lubricating oil pump drive shaft. mm 0.10 0.
Lubricating Oil Pump - Rebuild (07-06) Page 7-12 Lubricating Oil System N14 Remove the oil pump cover. Remove and discard the cover gasket. Remove the 7/16-20 straight thread o-ring adapter from the oil pump cover. Remove the high oil pressure relief valve as follows: 1. Use the light-duty puller kit, Part No. 3375784, or its equivalent to remove the retainer plug (1). 2. Remove the valve disc (2), the washer (3), and the pressure relief valve spring (4). NOTE: Carefully remove the retainer plug (1).
Lubricating Oil System N14 Cleaning Clean the gasket material from the lubricating oil pump body and the cover. Use solvent to clean the lubricating oil pump parts. Dry with compressed air. Use an acetylene torch tip cleaner or its equivalent that is 1.02 mm [0.040-inch] or less in diameter to clean the orifice in the cover. NOTE: The diameter of the orifice is 1.02 mm [0.040-inch]. Do not attempt to drill out the orifice or use a larger diameter wire to clean the orifice.
Lubricating Oil Pump - Rebuild (07-06) Page 7-14 Lubricating Oil System N14 Visually inspect the bushings in the oil pump body and the cover for damage. Measure the inside diameter of the bushings in the oil pump body and cover. mm 22.263 22.314 Bushing I.D. MIN MAX in 0.8765 0.8785 NOTE: If the bushings are worn larger than the maximum given, the bushings must be replaced. Measure the high oil pressure relief valve seat depth in the oil pump body. mm 46.73 Valve Seat Depth MAX in 1.
Lubricating Oil System N14 Lubricating Oil Pump - Rebuild (07-06) Page 7-15 Measure the outside diameter of the drive and the driven shafts in the bushing contact area. mm 22.20 22.22 Shaft O.D. MIN MAX in 0.8745 0.8750 NOTE: Shafts that are damaged or worn smaller than the minimum given must be replaced. Refer to Lubricating Oil Pump Drive Gear or Shaft - Replacement (07-09). Visually inspect the main drive gear for cracks, chipped, or broken teeth.
Lubricating Oil Pump - Rebuild (07-06) Page 7-16 Lubricating Oil System N14 Use valve spring tester, Part No. 3375182, to determine if the spring is defective. NOTE: Compress the spring to a height of 46.23 mm [1.820 inches]. The force required must be: • Minimum: 98 Newtons [22 lbf] • Maximum: 116 Newtons [26 lbf] NOTE: If the force required to compress the spring is not within the specifications given, the spring must be replaced.
Lubricating Oil System N14 Install the oil pump body and the drive shaft assembly in an arbor press. Support the end of the drive shaft, and press the main drive gear onto the shaft. NOTE: At this stage of assembly, there must not be more than 0.30 mm [0.012-inch] end clearance between the main drive gear and the oil pump body. Use a dial indicator located on the end of the lubricating oil pump drive shaft to make this measurement.
Lubricating Oil Pump - Rebuild (07-06) Page 7-18 Lubricating Oil System N14 Install the spring (4), the washer (3), the valve disc (2), and the retainer plug (1) into the bore of the locating plate. NOTE: Make sure the prongs on the disc are down (toward the washer) and that the cup side of the retainer plug is up (toward the mandrel). Install the small end of valve mandrel, Part No. 3376012, into the bore in the locating plate. Install the assembly in an arbor press.
Lubricating Oil System N14 Lubricating Oil Pump Body and Cover Bushing - Replacement (07-07) Page 7-19 Install new o-rings on the main oil pressure regulator plunger retainer plug. Lubricate the o-rings with vegetable oil. Install the plunger (4), the spring (3), the retainer plug (2), and the capscrew (1). Tighten the retainer plug capscrew. Torque Value: 25 N•m [20 ft-lb] Install a new o-ring on the adapter elbow. Lubricate the o-ring with clean 15W-40 oil.
Lubricating Oil Pump Body and Cover Bushing - Replacement (07-07) Page 7-20 Lubricating Oil System N14 Assembly Use bushing mandrel, Part No. ST-1158, to push the new bushings into the oil pump body and cover. NOTE: The bushings must be installed level with or no more than 0.51 mm [0.020-inch] below the surface of the oil pump body or cover. Use lubricating oil pump boring tool, Part No. 3375206, to cut the bore in the new bushings in the oil pump body and the cover.
Lubricating Oil System N14 Lubricating Oil Pump Body and Cover Bushing - Replacement (07-07) Page 7-21 Turn the adjusting knob clockwise to push the tool bit against the indicator tip. NOTE: Adjust the tool bit until the indicator is set to the same size as the setting standard. Tighten the set screw and remove the adjusting knob. Install the boring tool into the guide bushing. NOTE: The tool bit must go through the slot in the guide bushing. Do not allow the tool bit to hit against the guide bushing.
Lubricating Oil Pump Body and Cover Bushing - Replacement (07-07) Page 7-22 Lubricating Oil System N14 Use a cutting oil, and cut the bore in both bushings in the oil pump body. NOTE: Do not push down on the drill motor. The feed mechanism in the boring tool will move the boring bar. Stop the drill motor, and move the feed control lever to the ‘‘OFF’’ position. Pull up on the drive shaft to remove the tool bit from the bore. Remove the boring tool from the oil pump body.
Lubricating Oil System N14 Lubricating Oil Pump Body and Cover Bushing - Replacement (07-07) Page 7-23 Install the boring bar through the guide bushing. NOTE: The tool bit must go through the slot in the guide bushing. Do not allow the tool bit to hit against the guide bushing. With the feed control level in the ‘‘OFF’’ position, move the drive shaft down until the tool bit touches the bushing in the cover. Hold a new bushing and a 1.57 mm [0.
Lubricating Oil Pump Body and Cover Bushing - Replacement (07-07) Page 7-24 Lubricating Oil System N14 Use a cutting oil to lubricate and cool the bit while cutting the bore in the bushing. Stop the drill motor when the stop collar on the drive shaft is against the body of the boring tool. Move the feed control lever to the ‘‘OFF’’ position. Pull the drive shaft up to remove the tool bit from the bushing. Remove the boring tool from the oil pump body.
Lubricating Oil System N14 Lubricating Oil Pump Driven Gear Bushing - Replacement (07-08) Page 7-25 Measure the inside diameter of the bushings in the oil pump body and the cover. mm 22.28 22.30 Bushing I.D. (New) MIN MAX in 0.877 0.878 NOTE: Bushings that do not meet the specifications given must be replaced. Lubricating Oil Pump Driven Gear Bushing - Replacement (07-08) Disassembly Use bushing mandrel, Part No. ST-1158, to remove the worn or damaged bushings from the driven gear.
Lubricating Oil Pump Drive Gear or Shaft - Replacement (07-09) Page 7-26 Lubricating Oil System N14 Measure the inside diameter of the new bushings in the driven gear. mm 22.28 22.30 Bushing I.D. (New) MIN MAX in 0.877 0.878 NOTE: The bushings used in the driven gear are finished bushings and do not require cutting. If the bushing inside diameter is not within the specifications given after installation, the bushing must be replaced.
Lubricating Oil System N14 Lubricating Oil Pump Driven Shaft - Replacement (07-10) Page 7-27 Assembly Use clean 15W-40 oil to lubricate the drive shaft. Use spacer mandrel, Part No. ST-1157, and an arbor press to push the drive gear onto the drive shaft. If the spacer mandrel is not available, install the gear onto the shaft to the following dimension as measured from the end of the shaft. mm 27.43 27.69 Installed Depth MIN MAX in 1.080 1.
Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-28 Lubricating Oil System N14 Assembly Use gear and spacer mandrel, Part No. ST-1157, to install the driven shaft into the oil pump body as follows: 1. Lubricate the large outside diameter of the driven shaft with clean 15W-40 oil. 2. Install the large outside diameter of the driven shaft into the bore in the oil pump body. 3. Use an arbor press and the gear and spacer mandrel to push the shaft into the bore. 4.
Lubricating Oil System N14 Remove the oil cooler core hold down capscrews. Remove the oil cooler core from the oil cooler transfer connection (housing) by pulling the oil cooler water transfer tubes out of the o-ring adapters. Remove the four adapter plate capscrews and the o-ring adapters. Remove the six capscrews which connect the oil cooler support to the oil cooler transfer housing.
Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-30 Lubricating Oil System N14 Remove the oil cooler bypass valve and the spacer plate. Loosen the lubricating oil filter bypass valve retaining plug with a 5/16-inch hexagon allen wrench. Remove the retaining plug (1), the plunger (2), spring (3), and the poppet valve (4) from the lubricating oil cooler transfer housing (5). If the poppet valve sticks in the housing, it can be removed with the aid of a bent wire or by using your finger.
Lubricating Oil System N14 Remove CompuchekT fittings and straight thread o-ring plugs from the transfer housing and support. Remove the transfer housing support bracket. Cleaning Clean the gasket material from the oil cooler core, transfer housing, support, spacer plate and filter head. After removing the gasket material, clean with solvent; and dry with compressed air. Clean the filter head and shutoff valve with solvent. Dry with compressed air.
Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-32 Lubricating Oil System N14 Visually inspect the oil cooler support, housing, spacer plate, filter head, and support bracket for cracks or damage. Visually inspect the oil cooler bypass valve for damage. Any damage to the front face of the valve will allow oil to bypass the oil cooler. Visually inspect the oil cooler core for cracks or damage. Caution: Do not attempt to repair a damaged oil cooler core; it must be replaced.
Lubricating Oil System N14 Inspect the o-ring on the retaining plug for cuts or tears. Replace the o-ring if damaged. Inspect the teflon o-ring on the poppet valve for wear, cuts, or tears. Replace the complete poppet valve if there is any damage. Testing - Oil Cooler Core Caution: Do not reuse an oil cooler core after an engine failure since there is not a practical method to clean the cooler core.
Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-34 Lubricating Oil System N14 Attach a regulated air pressure hose to the other water transfer tube and apply 81 kPa [60 psi] air pressure. Caution: Conduct this test with extreme caution. Pressurization of the oil cooler assembly while submerged in a hot water bath poses a condition where one must exercise care to avoid burns and water splash.
Lubricating Oil System N14 Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-35 Suspend the valve and a 116°C [250°F] thermometer in a container of new lubricating oil. Do not allow the valve or the thermometer to touch the sides or bottom of the container. Heat the lubricating oil. NOTE: Record the temperature at which the valve is fully extended. The valve must be fully extended to at least 6 mm [0.250-inch] when the temperature reaches 116°C [240°F].
Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-36 Lubricating Oil System N14 Install the oil cooler bypass valve into the transfer housing. Place the spacer plate and a new spacer gasket on the oil cooler support. Use two of the connection retainer capscrews to keep the gasket and plate loosely aligned on the support. Install the transfer housing, a new transfer connection gasket, and the six capscrews that hold the oil cooler support to the oil cooler transfer housing. Tighten the capscrews.
Lubricating Oil System N14 Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-37 Install the oil cooler core on the oil cooler transfer connection (housing) by inserting the transfer tubes into the o-ring adapters. NOTE: Make sure the o-ring adapters move freely when the transfer tubes are inserted as this will allow tubes to be centered in the adapters. Install the oil cooler core mounting gaskets and hold down capscrews. Tighten the hold down capscrews.
Lubricating Oil Cooler Assembly - Rebuild (07-11) Page 7-38 Lubricating Oil System N14 Lubricate the o-ring with LubriplateT 105 or equivalent, and install the shutoff valve in the filter head. Install the retaining capscrew and washer. Torque Value: 20 N•m [15 ft-lb] Turn the valve to the ‘‘ON’’ position. The valve is in the ‘‘ON’’ position when the valve is in the vertical position. Install the oil cooler filter head, gasket, washers, and filter head 12 point capscrews.
Cooling System N14 Page 8-1 Section 8 - Cooling System - Group 08 Section Contents Page Coolant Filter Head Insert .............................................................................................................................. 8-23 Coolant Filter Shutoff Valve ........................................................................................................................... 8-23 Cooling System - Service Tools...........................................................................
Cooling System - Service Tools Page 8-2 Cooling System N14 Cooling System - Service Tools The following special tools are recommended to perform procedures in section 8. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Water Pump Bearing Mandrel ST-658 Use to press the water pump bearing on the shaft and to install the bearing and shaft assembly into the water pump body.
Cooling System N14 Cooling System - Service Tools Page 8-3 Tool No. Tool Description Medium Duty Puller Kit 3375779 Use to remove the radiator thermostat seat from the thermostat housing bore. O-ring Pick Use to install and remove o-rings. 3376399 Depth Gauge Use to measure the bypass thermostat seat counterbore depth. 3823495 Water Pump Seal Driver 3823815 Use to pilot water pump grease seals onto the water pump drive shaft.
N14 Water Pump and Idler Assembly - Exploded View Page 8-4 Cooling System N14 N14 Water Pump and Idler Assembly - Exploded View Reference No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Description Pulley, Water Pump Seal, Outer Oil Ring, Retaining Bearing, Ball Spacer Shaft, Water Pump Capscrew, Long Seal, Inner Oil Slinger Capscrew, Short Body, Water Pump Plug, Pipe Screw, Adjusting Assembly, Seal and Seat Quantity 1 1 1 2 1 1 2 1 1 5 1 2 1 1 Reference No.
Cooling System N14 Water Pump and Idler Assembly - General Informaton Page 8-5 Water Pump and Idler Assembly - General Informaton The water pump for the N14 engines is a centrifugal-type vane pump with a stamped steel shrouded impeller. The shrouded impeller increases the pump’s performance and reduces thrust loading. The water pump is belt driven from the accessory drive pulley. Belt tension is controlled by an adjustable idler pulley.
Water Pump Assembly - Cleaning and Inspection (08-01) Page 8-6 Cooling System N14 Water Pump Assembly - Cleaning and Inspection (08-01) Cleaning Before cleaning the water pump, inspect the weephole for large amounts of chemical fallout. A small amount is normal, but rebuild or replace the pump if a large amount is caked around the weephole. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury.
Cooling System N14 Water Pump Assembly - Rebuild (08-02) Disassembly Remove the pulley with puller, Part No. 3375257. Remove the impeller with puller, Part No. 3823040. Remove the retaining ring that holds the bearing assembly and shaft in the body. Support the pulley side of the body in an arbor press. Push the shaft from the impeller end to remove the outside oil seal, bearings, and the shaft from the body. Use a punch and a hammer to remove the inner oil seal and the slinger from the shaft.
Water Pump Assembly - Rebuild (08-02) Page 8-8 Cooling System N14 Use the disassembly fixture to support the inner bearing. Push the shaft from the bearing. Discard the bearing. Cleaning Use a gasket scraper to remove the gasket material from the gasket sealing surfaces. Use Scotch-BriteW 7448, Part No. 3823258, to clean the bearing and the oil seal bores in the water pump body. Use Scotch-BriteW 7448, Part No.
Cooling System N14 Inspection Visually inspect the water pump body for cracks, porosity, or excessive corrosion. NOTE: If the part being inspected does not meet the specification given or if it is damaged or no alternative is given, the part must be replaced. Measure the water pump body bearing bore inside diameter. Water Pump Body Bearing Bore I.D. mm in 61.988 MIN 2.4405 62.014 MAX 2.4415 Measure the water pump body seal and seat assembly bore inside diameter. Seal and Seat Assembly Bore I.D. mm in 36.
Water Pump Assembly - Rebuild (08-02) Page 8-10 Cooling System N14 Measure the water pump impeller bore inside diameter. mm 15.85 15.88 Impeller Bore I.D. MIN MAX in 0.624 0.625 Visually inspect the water pump drive pulley for cracks or damage. Visually inspect the pulley grooves and the oil seal wear sleeve for wear or damage. Replace the wear sleeve if worn. Measure the drive pulley bore inside diameter. mm 19.037 19.062 Drive Pulley Bore I.D. MIN MAX in 0.7495 0.
Cooling System N14 Point 1 2 3 Water Pump Assembly - Rebuild (08-02) Page 8-11 Shaft Journal O.D. mm 19.121 MIN 19.128 MAX 25.011 MIN 25.022 MAX 15.905 MIN 15.918 MAX in 0.7528 0.7531 0.9847 0.9851 0.6262 0.6267 Visually inspect the bearing retaining ring for nicks or cracks. Discard damaged parts. Assembly Use clean 15W-40 oil to lubricate the water pump shaft. Use water pump bearing mandrel, Part No. ST-658, to support a new inner bearing. Install the shaft into the bearing.
Water Pump Assembly - Rebuild (08-02) Page 8-12 Cooling System N14 Use water pump bearing mandrel, Part No. ST-658, to support a new outer bearing. Install the shaft and the spacer into the bearing. NOTE: Push the shaft through the bearing until the bearing is against the spacer. Make sure the inner race of the bearing is not overloaded from contact with the spacer. The bearings must rotate freely. Install a new inner oil seal and a new slinger onto the shaft. Use seal expander, Part No.
Cooling System N14 Install a new outside oil seal, using a mandrel to press the seal in flush with the housing. Apply a thin film of pipe sealant, Part No. 3375066, to the outside diameter of the new water pump seal. Support the pulley side of the water pump in an arbor press. Install a new water pump seal over the shaft. Use water pump seal mandrel, Part No. 3823815, to push the water pump seal into the water pump body. NOTE: The use of any tool other than Part No. 3823815 can result in seal damage.
Water Pump Idler Assembly - Cleaning and Inspection (08-03) Page 8-14 Cooling System N14 Prepare the drive pulley bore surface with LocktiteW Primer T, Part No. ST-1272-13. Apply a light film of LocktiteW 609, Part No. 3823718, to the bore in the drive pulley. Support the water pump pulley in an arbor press. Push the water pump shaft into the pulley bore until the pulley is against the large diameter (shoulder) of the shaft. Prepare the impeller bore surface with LocktiteW Primer T, Part No. ST-1272-13.
Cooling System N14 Inspection Visually inspect the idler assembly for cracked, chipped, or broken pulley grooves. Turn the idler pulley by hand to inspect the shaft and the bearing for freedom of rotation. NOTE: If damaged parts are found or the idler assembly does not rotate freely, the idler assembly must be replaced or rebuilt. Refer to Water Pump Idler Assembly - Rebuild (08-04). Water Pump Idler Assembly - Rebuild (08-04) Disassembly Carefully pry off the cover and the o-ring.
Water Pump Idler Assembly - Rebuild (08-04) Page 8-16 Cooling System N14 Remove the capscrew and the washer. Press the shaft out of the bearing. Discard the bearing. Cleaning Use solvent to clean the idler assembly parts. Dry with compressed air. Inspection Visually inspect the idler pulley for cracks or damage. Visually inspect the pulley grooves for wear or damage.
Cooling System N14 Water Pump Idler Assembly - Rebuild (08-04) Page 8-17 Visually inspect the idler shaft for grooves, nicks, or damage. Inspect the adjusting screw and the mounting nut threads for wear or distortion. Measure the outside diameter (1) of the bearing press fit area of the idler shaft. mm 24.980 24.993 Idler Shaft O.D. MIN MAX in 0.9835 0.9840 Visually inspect the bearing retaining ring, idler pulley cover, capscrew, and washer for cracks or damage. Discard damaged parts.
Water Pump Idler Assembly - Rebuild (08-04) Page 8-18 Cooling System N14 Support the idler pulley in an arbor press. Use bearing installation tool, Part No. ST-658, to press the bearing into the pulley until the bearing is against the bottom of the bearing bore. Install the retaining ring into the groove in the idler pulley. NOTE: The flat side of the bearing retaining ring must be installed toward the bearing. Push the shaft into the bearing by hand. Install the flat washer and the capscrew.
Cooling System N14 Install the oil seal with the lip toward the bearing. Use seal expander, Part No. 3823885, to guide the seal onto the shaft. Use a tube mandrel to press the seal in flush with the pulley. Press the cover and a new o-ring into the pulley. Thermostat Housing - Cleaning and Inspection (08-05) Disassembly Remove the four thermostat cover capscrews and disassemble the thermostat housing.
Thermostat Housing - Cleaning and Inspection (08-05) Page 8-20 Cooling System N14 Carefully remove the thermostat seal to avoid damaging the thermostat cover. Cleaning Use a gasket scraper to remove the gasket material from the mating surfaces of the housing and the cover. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury. Use solvent or steam to clean the parts. Dry with compressed air.
Cooling System N14 Inspect the thermostat seal and the thermostat cover gasket surface for cracks, corrosion, or damage. Replace the thermostat cover if necessary. The thermostat seal can not be reused. The seal must be replaced if it is removed from the cover. Inspect the thermostat for damage. Suspend the thermostat and a 100° C [212° F] thermometer in a container of water. Do not allow the thermostat or the thermometer to touch the sides of the container. Heat the water.
Thermostat Housing - Cleaning and Inspection (08-05) Page 8-22 Cooling System N14 Measure the inside diameter of the thermostat seal counterbore in the thermostat housing. mm 67.39 67.46 Thermostat Seal Bore I.D. MIN MAX in 2.653 2.656 Use a depth micrometer or a depth gauge, Part No. 3823495, to measure the depth of the seal counterbore in the thermostat housing. mm 42.16 42.67 Thermostat Seal Bore Depth MIN MAX in 1.66 1.
Cooling System N14 Coolant Filter Head Insert (08-06) Refer to Lubricating Oil Cooler Assembly - Rebuild in Section 7 for removal, cleaning, inspection, and installation of the coolant filter head insert. Coolant Filter Shutoff Valve (08-07) Refer to Lubricating Oil Cooler Assembly - Rebuild in Section 7 for removal, inspection, and installation of the coolant filter shutoff valve.
Water Transfer Tubes - Cleaning and Inspection (08-09) Page 8-24 Cooling System N14 Warning: Do not straighten a bent fan blade or continue to use a damaged fan. Replace the original equipment fan with a fan of the identical part number. Cummins Engine Company, Inc. must approve any other fan changes. Water Transfer Tubes - Cleaning and Inspection (08-09) Cleaning Use a gasket scraper to remove gasket material from the mating surfaces of the transfer tubes. Use Scotch-BriteW 7448, Part No.
Drive Units N14 Page 9-1 Section 9 - Drive Units - Group 09 Section Contents Page Accessory Drive - Cleaning and Inspection for Reuse ................................................................................... 9-5 Cleaning ........................................................................................................................................................ 9-5 Inspection ...............................................................................................................
Drive Units - Service Tools Page 9-2 Drive Units N14 Drive Units - Service Tools The following special tools are recommended to perform procedures in section 9. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No.
Drive Units N14 Accessory Drive - Exploded View Page 9-3 Accessory Drive - Exploded View Reference No. 1 2 3 4 5 Description Gear, Accessory Drive Pin, Groove Shaft, Accessory Drive Housing, Accessory Drive Washer, Plain Quantity 1 1 1 1 1 Reference No.
Drive Units - General Information Page 9-4 Drive Units N14 Drive Units - General Information Accessory Drive The accessory drive housings are available in two designs--with and without hardware for mounting an air compressor. The fuel pump drive assembly has hardware for a hub or spider-type coupling. The compressor drive assembly has hardware for a splined sleeve-type coupling. The rebuild procedures are the same for both designs.
Drive Units N14 Accessory Drive - Cleaning and Inspection for Reuse (09-01) Page 9-5 Accessory Drive - Cleaning and Inspection for Reuse (09-01) Cleaning Remove all gasket material from surfaces (1) and (2). Clean the exterior of the drive with solvent. Dry with compressed air. Inspection Measure the drive shaft end clearance at the end of the shaft for accurate measurement. mm 0.10 0.225 Drive Shaft End Clearance MIN MAX in 0.004 0.
Accessory Drive - Rebuild (09-02) Page 9-6 Drive Units N14 Use coupling puller, Part No. 3376663, to remove the splined coupling. Use a three-jaw puller to remove the hub-type coupling. Remove the capscrew. Remove the clamping washer. Remove the gear and shaft assembly. Remove the straight thread o-ring plugs from the housing. Cleaning Clean the parts with solvent. Dry with compressed air. Inspection Visually inspect the parts for damage.
Drive Units N14 Accessory Drive - Rebuild (09-02) Page 9-7 Visually inspect the shaft bore in the housing for scoring or damage. Measure the inside diameter of the shaft bore in the drive housing. mm 33.426 33.515 Drive Shaft Bore I.D. MIN MAX in 1.3160 1.3195 Measure the drive shaft outside diameter. Point (1) (2) (3) (4) Drive Shaft Journal O.D. mm 25.476 MIN 25.489 MAX 33.274 MIN 33.325 MAX 39.624 MIN 39.674 MAX 34.963 MIN 34.976 MAX in 1.0030 1.0035 1.3100 1.3120 1.5600 1.5620 1.3765 1.
Accessory Drive - Rebuild (09-02) Page 9-8 Drive Units N14 Measure the inside diameter of the drive pulley bore. mm 34.930 34.950 Drive Pulley Bore I.D. MIN MAX in 1.3752 1.3760 Assembly Use clean 15W-40 oil to lubricate the housing shaft bore. Use LubriplateT 105 or its equivalent to lubricate the front thrust face on the housing. Install the shaft and the gear. Use LubriplateT 105 or its equivalent to lubricate the rear thrust face on the housing. Install the clamping washer over the shaft.
Drive Units N14 Accessory Drive - Rebuild (09-02) Page 9-9 With the gear/shaft assembly supported in an arbor press, use a mandrel to install the coupling. Push the coupling until it touches the clamping washer. NOTE: The splined-type coupling must be installed with the relieved area facing the clamping washer. The hub-type coupling must be installed with the drive tangs facing away from the clamping washer.
Accessory Drive Gear - Replacement (09-03) Page 9-10 Drive Units N14 If the end clearance is not within specifications, make sure the coupling is positioned tightly against the clamping washer. Accessory Drive Gear - Replacement (09-03) Disassembly Install the shaft and gear assembly in an arbor press with the part number side of the gear facing upwards. Caution: Do not let the shaft fall when removing it from the drive gear. Damage to the shaft or personal injury can occur. Push the shaft from the gear.
Drive Units N14 Accessory Drive Gear - Replacement (09-03) Page 9-11 Visually inspect the shaft in the gear fit area for fretting or burrs. NOTE: If fretting or burrs can not be removed with a fine crocus cloth, replace the shaft. Measure the inside diameter of the drive gear. mm 39.730 39.751 Drive Gear Bore I.D. MIN MAX in 1.5642 1.5650 Measure the drive shaft outside diameter at the gear fit location. Drive Shaft Gear Fit Journal O.D. mm in 39.789 MIN 1.5670 39.814 MAX 1.
Accessory Drive Gear - Replacement (09-03) Page 9-12 Drive Units N14 Caution: The jaws of the vise must have copper plates to prevent damage to the shaft. Clamp the accessory drive shaft in a vise. Apply LubriplateT 105 or its equivalent to the gear fit area before installing the gear. Place the accessory drive gear in an oven. Caution: Do not exceed the temperature or time limits with the gear in the oven. The gear will be damaged.
Drive Units N14 Accessory Drive Pulley - Cleaning and Inspection for Reuse (09-04) Page 9-13 Accessory Drive Pulley - Cleaning and Inspection for Reuse (09-04) Cleaning Clean the accessory drive pulley with solvent. Dry with compressed air. Inspection Visually inspect the pulley for cracks, wear in the belt grooves, or other damage.
Accessory Drive Pulley Wear Sleeve - Replacement (09-05) Page 9-14 Drive Units N14 Grind a 1.57 mm [0.062-inch] radius on the cutting edge of a 19.05 mm [0.75-inch] chisel. Place the chisel point against the wear sleeve. Use moderate blows with a hammer to strike the chisel at four points on the outside diameter of the wear sleeve to relieve the press fit. After the press fit has been relieved, remove the wear sleeve by hand.
Drive Units N14 Accessory Drive Pulley Wear Sleeve - Replacement (09-05) Page 9-15 Use a fine grit emergy cloth dipped in clean lubricating oil to remove minor defects. Use a crocus cloth for final polishing operation and to remove any remaining deposits on the pulley wear sleeve mounting boss. Clean the wear sleeve mounting boss with a clean cloth. Measure the pulley wear sleeve mounting boss outside diameter. mm 50.77 50.82 Wear Sleeve Fit Area O.D. MIN MAX in 1.999 2.
Intake Air System N14 Page 10-1 Section 10 - Intake Air System - Group 10 Section Contents Page Intake Air Piping - Elbows .............................................................................................................................. 10-8 Inspection .................................................................................................................................................... 10-8 Intake Air System - Exploded View.........................................................
Intake Air System - Service Tools Page 10-2 Intake Air System N14 Intake Air System - Service Tools The following special tools are recommended to perform procedures in section 10. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Dial Depth Gauge Measure turbocharger axial motion.
Intake Air System N14 Intake Air System - Exploded View Page 10-3 Intake Air System - Exploded View Ref. No. 1 2 3 4 5 6 7 Description Connection, Intake Manifold Seal, Rectangular Ring Cover Cover Screw, Self-Tapping Capscrew Capscrew Qty. 1 1 1 1 18 6 3 Ref. No. 8 9 10 11 12 13 Description Seal, O-ring Plate Manifold, Intake Gasket, Intake Manifold Elbow Turbocharger Qty.
Intake Air System - General Information Page 10-4 Intake Air System N14 Intake Air System - General Information The intake air system consists of intake air piping, turbocharger, charge air cooler (CAC) piping, and CAC. The turbocharger uses exhaust gas energy to turn the turbine wheel. The turbine wheel drives the compressor impeller which provides pressurized air to the engine for combustion.
Intake Air System N14 Turbocharger - Cleaning and Inspection (10-01) Cleaning Remove all carbon deposits and gasket material from the gasket mating surfaces. NOTE: Tape or plug all openings to prevent solvent or steam from entering the oil cavities in the turbocharger. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam can cause serious personal injury. Use solvent or steam to clean the exterior of the turbocharger. Dry with compressed air.
Turbocharger - Cleaning and Inspection (10-01) Page 10-6 Intake Air System N14 Cracks on the turbocharger mounting flange must not reach the mounting holes. Two cracks on the turbocharger mounting flange must be separated by 6.4 mm [0.25-inch]. Through cracks at the dividing wall are acceptable and can be any length. They must be separated by at least 12.5 mm [0.5-inch].
Intake Air System N14 Turbocharger Shaft Axial Clearance - Checking (10-02) Page 10-7 Turbocharger Shaft Axial Clearance Checking (10-02) Measure the axial clearance (end to end), using dial depth gauge, Part No. ST-537. Push the rotor assembly away from the gauge. Set the gauge on zero (0). Push the rotor assembly toward the gauge and record the clearance. Model No. BHT3C Axial Clearance mm 0.03 MIN 0.10 MAX in 0.001 0.
Intake Air Piping - Elbows (10-04) Page 10-8 Intake Air System N14 Intake Air Piping - Elbows (10-04) Inspection Visually inspect the turbocharger compressor V-band outlet and the discharge elbow V-band connection for dents or fretting. Replace the turbocharger compressor housing or discharge elbow if damaged so that the compressed air will not leak. Intake Manifold - Cleaning and Inspection (10-05) Cleaning Remove all gasket material from the gasket mating surfaces.
Exhaust System N14 Page 11-1 Section 11 - Exhaust System - Group 11 Section Contents Page Exhaust Manifold - Cleaning and Inspection for Reuse ................................................................................ Assembly ..................................................................................................................................................... Cleaning ......................................................................................................................
Exhaust System - Exploded View Page 11-2 Exhaust System N14 Exhaust System - Exploded View Reference No.
Exhaust System N14 Exhaust System - General Information Page 11-3 Exhaust System - General Information The exhaust manifold group consists of the exhaust manifolds and the turbocharger mounting studs. The exhaust manifold utilizes a wear coating on the sealing surfaces of the manifold sections for improved sealing characteristics and greater reliability. As a running change on the 88NT model engines, the N14 will also incorporate the towerless capscrew mounting boss design exhaust manifolds.
Exhaust Manifold - Cleaning and Inspection for Reuse (11-01) Page 11-4 Exhaust System N14 Exhaust Manifold - Cleaning and Inspection for Reuse (11-01) Disassembly Use a mallet to remove the exhaust manifold sections. Cleaning Use a wire brush to remove carbon from the gasket sealing surfaces. Use penetrating oil and wipe the wear coated slip joints clean of carbon. NOTE: Do not use abrasive materials to clean the wear coated slip joints on the manifold sections. Abrasives will damage the wear coating.
Exhaust System N14 Exhaust Manifold Turbocharger Mounting Stud - Replacement (11-02) Page 11-5 Exhaust Manifold Turbocharger Mounting Stud - Replacement (11-02) Apply penetrating oil to the base of the turbocharger mounting stud to be removed. Use a standard stud extractor to remove the turbocharger mounting stud(s) from the center section. Mounting Hole Threads - Inspection Visually inspect for damaged threads in the turbocharger mounting stud holes. If threads are damaged (cross-threaded, etc.
Air Equipment N14 Page 12-1 Section 12 - Air Equipment - Group 12 Section Contents Page Air Compressor Cleaning and Inspection for Reuse................................................................................................................ 12-3 Cleaning ................................................................................................................................................... 12-3 Inspection ...................................................................................
General Information Page 12-2 Air Equipment N14 Air Equipment - General Information Air Compressor The air equipment group consists of Cummins single and two-cylinder air compressors, compressor check valves, and air and coolant piping. It also includes air activated cranking motors. The air compressor is lubricated by engine lubricating oil which enters the compressor through a drilling in the support. The oil lubricates the connecting rod bearings and the crankshaft.
Air Equipment N14 Air Compressor - Cleaning and Inspection for Reuse (12-01) Page 12-3 Air Compressor - Cleaning and Inspection for Reuse (12-01) Cleaning Remove all gasket material from the sealing surfaces. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Caution: Seal all openings with tape to prevent future damage from solvent or steam entering the oil passages in the air compressor.
Air Compressor - Cleaning and Inspection for Reuse (12-01) Page 12-4 Air Equipment N14 Visually inspect the compressor drive gear and the fuel pump hub-type drive coupling for wear or damage. Measure the single cylinder air compressor crankshaft end clearance. Crankshaft End Clearance mm in. 0.06 MIN 0.002 0.69 MAX 0.027 Measure the two-cylinder air compressor crankshaft end clearance. Crankshaft End Clearance mm in. 0.05 MIN 0.002 0.28 MAX 0.
Electrical Equipment N14 Page 13-1 Section 13 - Electrical Equipment - Group 13 Section Contents Page Alternator Adjusting Link Cleaning and Inspection for Reuse .................................................................................................................... 3 Cleaning ................................................................................................................................................... 13-3 Inspection ........................................................
General Information Page 13-2 Electrical Equipment N14 Electrical Equipment - General Information The electrical equipment used on the N14 engine is not manufactured by Cummins Engine Company, Inc.Complete instructions for adjusting, testing, and repairing the electrical equipment can be obtained from the equipment manufacturer. The following list contains the suppliers of the electrical equipment used on Cummins engines: Alternators Robert Bosch Ltd. P.O.
Electrical Equipment N14 Alternator Bracket - Cleaning and Inspection for Reuse (13-01) Page 13-3 Wiring Diagrams A complete collection of electrical wiring diagrams, as applied to all Cummins engines, is contained in Wiring Diagrams, Bulletin No. 3379099. Alternator Bracket - Cleaning and Inspection for Reuse (13-01) Cleaning Use solvent to clean the bracket. Dry with compressed air. Inspection Visually inspect the bracket for cracks and other damage. Discard damaged parts.
Starting Motor - Cleaning and Inspection for Reuse (13-03) Page 13-4 Electrical Equipment N14 Inspection Visually inspect the gear (1) for cracked or broken teeth. Visually inspect the drive bushing (2) and the gear shaft (3) for excessive wear or damage. Visually inspect the terminal posts (4) for loose or broken connections. NOTE: If the starting motor parts are damaged or the posts are loose or damaged, the starting motor must be repaired or rebuilt.
Engine Testing N14 Page 14-1 Section 14 - Engine Testing - Group 14 Section Contents Page Chassis Dynamometer Operation.................................................................................................................. 14-29 Definition of Terms On Engine Performance Curve....................................................................................... 14-3 Dynamometer Worksheet ............................................................................................................
General Information Page 14-2 Engine Testing N14 General Information This section outlines engine testing and engine run-in recommendations for N14 engines. All engines must be run-in after a rebuild or a repair involving the replacement of one or more piston ring sets, cylinder liners or cylinder kits. Incorrect or insufficient break-in of the piston rings will lead to early oil consumption or high blowby complaints.
Engine Testing N14 Definition of Terms On Engine Performance Curve Page 14-3 Definition of Terms On Engine Performance Curve Cummins 1991 N14 Heavy Duty Engine Operating Curve Definitions: 1. Peak Torque (N•m [ft-lb]) - Maximum torque that the engine will produce. Also, sometimes referred to as COMMAND TORQUE. This is listed on the engine data plate. 2. Peak Torque RPM (RPM) - Engine speed at which peak torque is generated. This is listed on the engine data plate. 3.
General Run-In Procedures Page 14-4 Engine Testing N14 General Run-In Procedures Caution: Refer to General Engine Test Specifications before operating the engine to avoid internal component damage. Caution: The lubricating oil system must be pressurized before operating the engine to avoid internal component damage. NOTE: The amount of time specified for the following engine run-in phases are minimums.
Engine Testing N14 Caution: Do not shut off the engine immediately after the run-in is completed. Allow the engine to cool by operating at low idle for a minimum of 3 minutes to avoid internal component damage.
General Engine Test/Run-In Specifications Page 14-6 Engine Testing N14 General Engine Test/Run-In Specifications Maintain the following limits during the engine test/run-in procedures: Due to variations in ratings of different engine models, refer to the specific ‘‘Engine Data Sheet’’ for the particular engine model being tested. Charge Air Cooler Restriction (Maximum) ................................................................... 102 mm Hg [4.0 in. Hg] 14 kPa [2.
Engine Testing N14 Engine Testing - Service Tools Page 14-7 Engine Testing - Service Tools The following special tools are recommended to perform procedures in Section 14. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Vacuum Gauge Used to check fuel filter or intake air restriction. ST-434 Pressure Gauge ST-435-6 Included in snap rail pressure gauge, Part No. 3375932.
Engine Testing - Service Tools Page 14-8 Tool No. Engine Testing N14 Tool Description Blowby Checking Tool 3375150 Used with manometer, Part No. ST-1111-3, to measure the engine crankcase pressure. Pressure Gauge (0-300 psi) 3375932 Used to measure fuel pressure. Includes necessary hoses and hardware to attach to a fuel pump. Part No. ST-435-1 is the hose and Part No. ST-435-6 is the pressure gauge. Fuel Measuring Device 3376375 Measure the rate of fuel consumption of a Cummins diesel engine.
Engine Testing N14 Engine Dynamometer - Install Engine (14-01) NOTE: Be sure the dynamometer capacity is sufficient to permit testing at 100 percent of the engine rated horsepower. If the capacity is not enough, the testing procedure must be modified to the restrictions of the dynamometer. Use engine lifting fixture, Part No. 3822512, to install the engine to the test stand. Align and connect the dynamometer. Refer to the manufacturer’s instructions for aligning and testing the engine.
Engine Dynamometer - Install Engine (14-01) Page 14-10 Engine Testing N14 Visually inspect the engine for coolant leaks. Repair all leaks found. The intake air piping must be plumbed through an aftercooler to control the temperature of the intake air during the run-in procedure. Rig an aftercooler beside the engine, and plumb the intake pipes from the turbocharger, through the aftercooler and back to the intake manifold. Use a temperature gauge to measure the intake manifold temperature.
Engine Testing N14 Remove the straight thread fitting in the accessory drive and install the lubricating oil temperature sensor. Remove the pipe plug from the main oil rifle drilling in the cylinder block. Install the lubricating oil pressure sensor. Remove the pipe plug in the intake manifold just below the inlet air connection and install the intake manifold pressure gauge. Install the Part No. 3375150, Engine Blowby Tool, to the breather on the rocker lever cover to measure engine crankcase pressure.
Engine Dynamometer - Install Engine (14-01) Page 14-12 Engine Testing N14 Fuel Rate The Part No. 3376375, Fuel Measuring instrument, is used during the performance check to measure fuel consumption. Install the fuel measuring device as follows: • The fuel return hose from the engine to the fuel measuring device (A). • The fuel inlet hose to the fuel filter inlet (B). • The return hose from the device (C) to the fuel tank. • The fuel inlet hose to the device from the fuel tank suction line (D).
Engine Testing N14 Fuel Pressure Measure the fuel pressure. Install the pressure gauge, Part No. ST-435-6, or the pressure gauge in the fuel measuring device, Part No. 3376375, to the CompucheckT fitting on the fuel shutoff valve. NOTE: Pressure gauge, Part No. ST-435-6, is included with snap rail pressure gauge, Part No. 3375932. Fuel Drain Line Restriction Use pressure gauge, Part No. ST-1273, to measure fuel drain line restriction.
Engine Dynamometer - Install Engine (14-01) Page 14-14 Engine Testing N14 Use an air tank (2). Install an air regulator (3) capable of maintaining 345 to 517 kPa [50 to 75 psi] air pressure at both minimum and maximum engine RPM. Install a steel tube or high temperature hose (1). Hose Temperature (Minimum): 235°C [500°F]. Connect the tube or hose (1) to the air compressor outlet. NOTE: Inspect the voltage rating on the starting motor before installing the electrical wiring.
Engine Testing N14 Engine Dynamometer - Install Engine (14-01) Page 14-15 Connect the dynamometer test OEM wiring harness AMP connector to the ECM. Tighten the connector capscrews to the ECM. Torque Value: 2.0 N•m [18 in-lb] Connect the dynamometer test OEM wiring harness 3-pin connector to the actuator harness power connector (shroud). Connect the dynamometer test OEM wiring harness 9-pin connector to the sensor harness 9-pin connector. Connect the battery power to the starting motor.
Engine Dynamometer - Install Engine (14-01) Page 14-16 Engine Testing N14 Connect the dynamometer test OEM wiring harness starting motor solenoid lead (yellow) to the starting motor solenoid. Connect the ground lead (black) to the starting motor or battery negative or ground side. Connect the +12 volt DC power lead (red) to either the starting motor or battery positive (+12 volt DC) side. To control throttle input and engine speed, connect the auto/manual throttle control, Service Tool Part No.
Engine Testing N14 Select the ‘‘Feature Selection’’ from the menu options by depressing the number ‘‘1’’ on the keypad. The next screen will show if the ‘‘Progressive Shift Feature’’ is turned ‘‘ON’’ or ‘‘OFF’’. Check the ‘‘Progressive Shift Feature’’. If ‘‘Y’’ is displayed, depress the number ‘‘2’’ key on the keypad to display ‘‘N’’ and turn ‘‘OFF’’ the ‘‘Progressive Shift’’. NOTE: Turn the ‘‘Progressive Shift Feature’’ back ‘‘ON’’ when the test is completed.
Priming the Lubricating Oil and Fuel Systems (14-02) Page 14-18 Engine Testing N14 If the parameter is to be bypassed with the Compulink™, refer to the following instructions. Select ‘‘Troubleshooting’’, key (1), from the ‘‘Main Menu Option’’ screen. Select ‘‘Special Functions’’, key (4), from the ‘‘Troubleshooting Menu’’. Select ‘‘Set Up for Compuchek’’ from the ‘‘Special Functions Menu’’. The Compulink™ must be left in this mode throughout the test.
Engine Testing N14 Priming the Lubricating Oil and Fuel Systems (14-02) Page 14-19 On CELECT™ engines, remove the lubricating oil temperature sensor from the lubricating oil pump cover. Lubricating oil pumps on N14 STC engines are equipped with a 9/16-18 UNF CompuchekT coupling nipple. Use the coupler, Part No. 3376859, to connect the priming pump to the coupling. Install the priming pump oil supply hose to the lubricating oil pump coupling. Use clean 15W-40 lubricating oil from a drum or a container.
Priming the Lubricating Oil and Fuel Systems (14-02) Page 14-20 Engine Testing N14 NOTE: If an external pressure pump is not available, prime the lubricating system as follows: Use the dipstick to measure the lubricating oil level. Fill the oil pan to the ‘‘high’’ level mark on the dipstick. Disconnect the turbocharger lubricating oil supply line. Pour 50 to 60 cc [2.0 to 3.0 fl oz] of clean 15W-40 oil in the turbocharger oil supply line fitting. Install the turbocharger oil supply line.
Engine Testing N14 Disconnect the electrical wire that supplies power to the fuel pump solenoid. NOTE: The manual override screw must be turned counterclockwise until it stops. Caution: Do not crank the starting motor for more than 30 seconds. Excessive heat will damage the starting motor. Crank the engine until the oil pressure gauge indicates a positive pressure.
Priming the Lubricating Oil and Fuel Systems (14-02) Page 14-22 Engine Testing N14 Install the filter on the filter head and tighten the filter until the gasket contacts the filter head surface. Tighten the filter an additional one-half to three-fourths (1/2 to 3/4) turn. Fuel System Priming - PT System To reduce engine cranking time, prime the fuel pump. NOTE: If the fuel pump is dirty, clean the outside of the pump near the filter screeen cap. Remove the plug from the top of the fuel pump housing.
Engine Testing N14 Priming the Lubricating Oil and Fuel Systems (14-02) Page 14-23 Install the electrical wire that supplies power to the solenoid. NOTE: The manual override screw on the solenoid must be turned counterclockwise until it stops to allow the solenoid to open and close. Install the throttle control device to the throttle arm on the fuel pump. Fuel System Priming - CELECT™ System To reduce engine cranking time, prime the fuel supply pump.
Engine Run-In Procedure - Engine Dynamometer (14-03) Page 14-24 Engine Testing N14 If the filter cap opening can not be used, remove the fuel supply hose to the gear pump. Lubricate the gear pump gears with clean engine lubricating oil. Install the fuel supply hose to the gear pump. Engine Run-In Procedure - Engine Dynamometer (14-03) Measurements from these indicators and gauges must be observed closely during all phases of the engine run-in period.
Engine Testing N14 Engine Run-In Procedure - Engine Dynamometer (14-03) Page 14-25 It is a good practice to observe these measurements even if engine performance meets specifications. If engine performance does not meet specifications, these measurements can indicate possible reasons for underperformance.
Engine Run-In Procedure - Engine Dynamometer (14-03) Page 14-26 Engine Testing N14 Open the throttle to obtain speed at which maximum horsepower is developed and adjust the dynamometer load to achieve 75 percent of rated fuel pressure or 75 percent fuel rate on CELECT™ engines. Operate the engine at this speed and load level for 3 minutes. Check all gauges and record the data. NOTE: Do not proceed to the next step until blowby is stable within specifications.
Engine Testing N14 Engine Run-In Procedure - Engine Dynamometer (14-03) Page 14-27 Caution: Shutting off the engine immediately after operating at full load will damage the turbocharger and internal components. Always allow the engine to cool before shutting it off. Remove the dynamometer load completely, and operate the engine at 700 to 900 RPM for 3 to 5 minutes. This period will allow the turbocharger and other components to cool. Shut off the engine.
Dynamometer Worksheet Page 14-28 Engine Testing N14 Dynamometer Worksheet Date Repair Order No. Operator ESN CPL Fuel Pump Code Complaint SC Code (CELECT™) PARAMETER Fuel Pressure (psi @ RPM) Fuel Rate (pph) Check Point 1 (psi @ RPM) Intake Mfd. Pressure (in.
Engine Testing N14 Chassis Dynamometer Operation (14-04) The performance of an engine installed in ‘‘on-highway’’ vehicles can be tested on a chassis dynamometer. NOTE: Due to driveline inefficiencies and engine-driven accessories, the rated horsepower will be reduced by approximately: • 20 percent for single axle vehicles • 25 percent for tandem axle vehicles The net horsepower available is called wheel horsepower (WHP).
Chassis Dynamometer Operation (14-04) Page 14-30 Engine Testing N14 • Make sure the tires are inflated to the manufacturer’s specifications. • Remove all rocks or other material from the tread of all tires that will be rotating on the dynamometer rollers. • Make sure there is correct overhead clearance for exhaust stacks, air deflectors, or other attachments above the cab. Caution: The ‘‘tie down’’ chains must have slack in their tension to prevent damage to the chassis dynamometer.
Engine Testing N14 General Test Procedure - Chassis Dynamometer (14-05) Page 14-31 • Make sure there is proper overhead clearance for exhaust stacks, air deflectors, or other attachments above the cab. General Test Procedure - Chassis Dynamometer (14-05) Check the engine coolant level to be sure it is filled to the proper level. Warning: Check the coolant level only when the engine is stopped. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap.
General Test Procedure - Chassis Dynamometer (14-05) Page 14-32 Engine Testing N14 To properly monitor engine performance, record the following parameters. To limit dynamometer operating time, instrument the engine to make as many checks as possible.
Engine Testing N14 General Test Procedure - Chassis Dynamometer (14-05) Page 14-33 Fuel Rate Use fuel measuring device, Part No. 3376375, to measure the rate of fuel consumption. Install the fuel measuring device as follows: • The fuel return hose from the engine to the fuel measuring device (A). • The fuel inlet hose to the fuel filter inlet (B). • The return hose from the device (C) to the fuel tank. • The fuel inlet hose to the device from the fuel tank suction line (D).
General Test Procedure - Chassis Dynamometer (14-05) Page 14-34 Engine Testing N14 Fuel Drain Line Restriction Use Pressure Gauge, Part No. ST-1273, to measure fuel drain line restriction. NOTE: Do not measure fuel drain line restriction with the fuel measuring device installed. This will not measure the drain line restriction of the vehicle’s return plumbing. Hold the gauge at the same level as the connection.
Engine Testing N14 General Test Procedure - Chassis Dynamometer (14-05) Page 14-35 Charge Air Cooler Restriction Measure the intake pressure drop across the charge air cooler. This test can be done with a mercury manometer or two separate gauges, Part No. ST-1273. If two gauges are being used, calibrate both gauges on a common pressure source at 206 kPa [30 PSI] to ensure consistency. Install one pressure gauge, Part No. ST-1273, in the fitting in the turbocharger compressor outlet elbow.
General Test Procedure - Chassis Dynamometer (14-05) Page 14-36 Engine Testing N14 Operate the engine at maximum horsepower RPM and Advertised Horsepower. Observe the reading on the gauge or manometer. NOTE: Restriction must not exceed 635 mm H20 [25 inches H20]. Exhaust Air Restriction Measure the exhaust air restriction. Install the vacuum gauge, Part No. ST-1273, or a manometer in the exhaust air piping.
Engine Testing N14 General Test Procedure - Chassis Dynamometer (14-05) Page 14-37 Install a plug in the crankcase breather vent tube. Remove the ‘‘bottle stopper’’ oil filler cap and install the blowby checking tool, Part No. 3375150. Install the water manometer to the blowby checking tool. Observe the engine blowby. Engine blowby must not exceed the following specifications: Blowby Specifications New, Rebuilt Engines* 30.5 cm H20 [12.0 in H20] Used Engines** 46.0 cm H20 [18.
Engine Run-In Procedure - Chassis Dynamometer (14-06) Page 14-38 Engine Testing N14 Engine Run-In Procedure - Chassis Dynamometer (14-06) NOTE: Refer to Chassis Dynamometer Operation, Procedure 14-04, for general operating procedures and safety precautions. NOTE: Operate the vehicle in a gear that produces a road speed of 90 to 100 km/h [55 to 60 mph] at maximum horsepower RPM.
Engine Testing N14 Engine Run-In Procedure - Chassis Dynamometer (14-06) Page 14-39 If a sudden increase in blowby occurs, or if blowby exceeds the maximum allowable limit during any run-in, return to the previous step and continue the run-in. If blowby does not reach an acceptable level during the next step, discontinue the run-in and determine the cause. Do not proceed to the next step until a steady, acceptable blowby reading is obtained. NOTE: Blowby must be measured by using Service Tool, Part No.
Engine Run-In Procedure - Chassis Dynamometer (14-06) Page 14-40 Engine Testing N14 Operate the engine at nominal torque peak RPM, full load, wide open throttle, for 5 minutes. Check the gauges, and record the readings. NOTE: Refer to the engine ‘‘Data Sheet’’ for the torque peak RPM of the engine model being tested. Operate the engine at maximum horsepower RPM and Advertised Horsepower with a wide open throttle for 5 minutes. Check the gauges, and record the readings.
Engine Testing N14 Engine Run-In Procedure Without Dynamometer (14-07) Page 14-41 Engine Run-In Procedure Without Dynamometer (14-07) On-Highway Caution: Refer to General Information and General Engine Test Specifications and Procedures before operating the engine to avoid internal component damage. Operate the vehicle pulling heaviest available trailer allowed for the first 80 to 160 km [50 to 100 miles] after rebuild.
Engine Painting (14-08) Page 14-42 Engine Testing N14 Engine Painting (14-08) Cover the following: • Exhaust and Intake Openings • Electrical Components • Fuel Inlet and Drain Connections • Any Exposed Fittings, Threads and Electrical Wire Terminals Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Use steam to clean the engine. Dry with compressed air.
Engine Testing N14 Engine Storage - Short Term (14-09) Page 14-43 Engine Storage - Short Term (14-09) NOTE: This procedure describes the proper method to prepare an engine for short term storage (1 to 6 months). Operate the engine at ‘‘High Idle’’ speed until the coolant temperature indicator reaches: Temperature: 70°C [160°F] Shut off the engine. Remove the fuel lines to the engine fuel filter and the injector return line. NOTE: Use Daubert Chemical NoxRust No. 518 Preservative Oil, or equivalent.
Engine Storage - Short Term (14-09) Page 14-44 Engine Testing N14 Turn the fuel pump manual shutoff valve counterclockwise until it stops. Remove the electrical wiring from the fuel pump solenoid. Drain the cooling system. NOTE: It is not necessary to drain the coolant if it is a permanent type antifreeze with a rust inhibitor. Do not drain the coolant if the engine is installed in a vehicle. Cover all openings with tape to prevent dirt and moisture from entering the engine.
Engine Testing N14 Engine Storage - Long Term (14-10) Page 14-45 Remove the Engine From Short Term Storage Remove the tape from the openings. Remove the warning tag. Replace the oil, water, and fuel filters. Prime the lubricating oil system. Refer to Priming the Lubricating Oil System (14-02). Use clean diesel fuel to flush the preservative oil from the fuel system. Fill the cooling system (if necessary). Adjust the injector and valve clearance. Refer to Engine Assembly (00-02). Adjust the belt tension.
Engine Storage - Long Term (14-10) Page 14-46 Engine Testing N14 Drain the lubricating oil pan. Install the drain plug. Torque Value: 136 N•m [100 ft-lb] Fill the oil pan to the ‘‘High’’ level mark with preservative oil. NOTE: Use Shell 66202, or an equivalent preservative oil. The oil must meet Military Specification MIL-L-21260 Type R10 Grade 2 SAE 30. Remove the fuel lines to the engine fuel filter and the injector return line. NOTE: Use Daubert Chemical NoxRust No.
Engine Testing N14 Remove the intake manifold. Remove the exhaust manifold. Refer to Engine Disassembly (00-01). Spray preservative oil into the intake and exhaust ports in the cylinder head and into the exhaust manifolds. Install the intake manifold. Install the exhaust manifold. Refer to Engine Assembly (00-02). Remove the rocker housing cover. Refer to Engine Disassembly (00-01). Spray the rocker levers, crossheads, valve springs, valve stems, valve guides, and the push rods with preservative oil.
Engine Storage - Long Term (14-10) Page 14-48 Engine Testing N14 Use clean diesel fuel to flush the preservative oil from the fuel system. Remove a plug from the main oil rifle drilling. Use a light mineral oil to flush the preservative oil from the engine. NOTE: Use the accessory drive shaft to rotate the crankshaft three to four revolutions during the flushing procedure. Drain and flush the cooling system. Replace the oil, water, and fuel filters. Fill the cooling system with coolant.
Instruments and Controls N14 Page 15-1 Section 15 - Instruments and Controls - Group 15 Section Contents Page Instruments and Controls ................................................................................................................................ 2, 3 General Information..............................................................................................................................
General Information Page 15-2 Instruments and Controls N14 Instruments and Controls - General Information The instruments and controls group consists of the gauges, speed switches, safety controls, cold weather operating aids, etc. used on Cummins engines. Gauges that indicate the coolant temperature, oil pressure, and oil temperature will provide the operator information on the condition of the engine. Overheating and low or high oil pressure indicate a malfunction that requires mechanical correction.
Instruments and Controls N14 General Information Page 15-3 Instruments and Controls - General Information (Cont’d) Oil Heaters Fleetguard, Inc. Route 8 Cookeville, TN 38501 Telephone: (615) 526-9551 Kim Hotstart Co. West 917 Broadway Spokane, WA 99210 Telephone: (509) 534-6171 Service Products Company, Inc. 635 S.
Mounting Adaptations N14 Page 16-1 Section 16 - Mounting Adaptations - Group 16 Section Contents Page Flywheel Cleaning and Inspection for Reuse .............................................................................................................. 16-5 Cleaning ................................................................................................................................................... 16-5 Inspection ............................................................................
Mounting Adaptations - Service Tools Page 16-2 Mounting Adaptations N14 Mounting Adaptations - Service Tools The following special tools are recommended to perform procedures in Group 16. The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Tool No. Tool Description Dowel Pin Extractor Use to pull dowel pins and crosshead guides. ST-1134 Plate ST-1232-1 (in Part No.
Mounting Adaptations N14 Mounting Adaptations - Exploded View Page 16-3 Mounting Adaptations - Exploded View Reference No. 1 2 3 Description Support, Front Engine Cover, Access Hole Housing, Flywheel Quantity 1 1 1 Reference No.
Mounting Adaptations - General Information Page 16-4 Mounting Adaptations N14 Mounting Adaptations - General Information The mounting adaptations group consists of the flywheel housing, flywheel, flywheel ring gear, pilot bearing, and the front engine support. The flywheel is available only as an assembly with the ring gear installed; however, the ring gear is available for service replacement.
Mounting Adaptations N14 Flywheel - Cleaning and Inspection for Reuse (16-01) Cleaning Use a wire brush to clean the crankshaft pilot bore. Steam clean or use a solvent, and dry with compressed air. Inspection Visually inspect for nicks or burrs. Use a fine crocus cloth to remove small nicks and burrs. Warning: Do not use a cracked or resurfaced flywheel. These can break, causing serious personal injury or property damage. Use crack detection kit, Part No. 3375432, to check for cracks in the flywheel.
Flywheel Ring Gear - Replacement (16-02) Page 16-6 Mounting Adaptations N14 Flywheel Ring Gear - Replacement (16-02) Caution: Do not use a cutting torch to heat the ring gear. The flywheel can be damaged. Heat the outside diameter of the ring gear with a heating torch. Use a blunt chisel and a hammer to remove the gear from the flywheel. Caution: Do not overheat the ring gear. The metal hardness will be changed. Heat the new ring gear in an oven heated to 316°C [600°F] for a minimum of 1 hour.
Mounting Adaptations N14 Flywheel Housing - Redowel to Cylinder Block (16-04) Page 16-7 Inspection Visually inspect all surfaces for nicks, burrs, or cracks. Use a fine crocus cloth to remove small nicks and burrs. Inspect all threaded capscrew holes for damage. Repair or replace the housing if the capscrew holes are damaged.
Flywheel Housing - Redowel to Cylinder Block (16-04) Page 16-8 Mounting Adaptations N14 Measure and record the diameter of one of the dowel pins which was removed to determine the next oversize dowel to be installed after the housing is aligned. Install the flywheel housing without the dowel pins. Tighten the capscrews. Torque Value: 7 N•m [5 ft-lb] NOTE: Do not tighten the capscrews to the final torque value until the flywheel housing is aligned.
Mounting Adaptations N14 If the total indicator reading exceeds the limits listed in Section 00-02 ‘‘Flywheel Housing Installation,’’ use a mallet to horizontally move the housing one-half the distance of the total indicator reading. Rotate the crankshaft until the indicator is at the 12:00 o’clock position. Adjust the dial until the needle points to ‘‘0.’’ Rotate the crankshaft until the indicator is at the 6:00 o’clock position. Check the total indicator reading.
Flywheel Housing - Redowel to Cylinder Block (16-04) Page 16-10 Mounting Adaptations N14 Tighten the mounting capscrews in the sequence shown. Torque Value: 203 N•m [150 ft-lb] After the capscrews are torqued, check the housing bore and the surface alignment again before doweling the housing. Use the appropriate size capscrews. Attach a plate, Part No. ST-1232-1, which is contained in drill ream fixture, Part No. ST-1232. NOTE: Do not tighten the capscrews so tightly that the plate will not move.
Mounting Adaptations N14 Flywheel Housing - Redowel to Cylinder Block (16-04) Page 16-11 The dowel must be long enough to protrude from the block one-half of the flywheel housing wall thickness but must not protrude past the housing wall. NOTE: There are three oversize dowel pins available: Oversize Dowel Pin O.D. Overall Dimension Amount Oversize mm in mm in 13.08 [0.515] 0.38 [0.015] 13.46 [0.530] 0.76 [0.030] 13.84 [0.545] 1.14 [0.045] Install the appropriate drill bushings.
Flywheel Housing - Redowel to Cylinder Block (16-04) Page 16-12 Mounting Adaptations N14 After reaming one hole, turn the plate and align it with the second dowel hole. Repeat the procedure in the second hole. Remove the plate from the crankshaft. Caution: To avoid possible engine damage, make sure the dowel hole does not contain any metal chips. Use a square nose drift. Drive each dowel in until it touches the bottom of the hole in the block.
Mounting Adaptations N14 Front Engine Support Bracket - Cleaning and Inspection for Reuse (16-05) Page 16-13 Front Engine Support Bracket Cleaning and Inspection for Reuse (16-05) Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Cleaning Steam clean or use solvent, and dry the parts with compressed air. Inspection Visually inspect the engine mounts for cracks or deterioration.
Specifications NT 855 Group Index Page 18-1 Specifications - Group 18 Group Index Page Air Compressor Inspection Specifications ............................................................................................................................. 18-66 Cam Follower Assembly Rebuild Specifications ................................................................................................................................. Fixed Injection Timing ....................................................
Group Index Page 18-2 Specifications NT 855 Page Specifications General Information ...................................................................................................................................... 18-8 Thermostat Housing Assembly Rebuild Specifications ................................................................................................................................. 18-59 Thermostat (Reserve Flow Cooling) Operating Temperature ...........................................
Specifications NT 855 General Engine Specifications Page 18-3 General Engine Specifications General Engine Data Metric [U.S. Customary] Horsepower (Refer to the engine dataplate) Engine speed @ Maximum Output: • Standard Rating (RPM) ................................................................................................................... 2100 • Formula Rating (RPM) ........................................................................................................
General Engine Specifications (Continued) Page 18-4 Specifications NT 855 General Engine Specifications (Continued) Cooling System Metric [U.S. Customary] Coolant Capacity (engine only) ...................................................................................... 21 liters [22 U.S. qt.] Standard Modulating Thermostat Range: • Conventional Aftercooling .............................................................................. 82 to 93°C [180 to 200°F] • Optimized Aftercooling ...............
Specifications NT 855 Capscrew Markings and Torque Values Page 18-5 Capscrew Markings and Torque Values Caution: When replacing capscrews, always use a capscrew of the same measurement and strength as the capscrew being replaced. Using incorrect capscrews can result in engine damage. SAE capscrews are graded according to the strength of the capscrew. They are marked on the head so the correct strength and torque value are known.
Pipe Plug Torque Values Page 18-6 Specifications NT 855 Pipe Plug Torque Values Size Thread in 1/16 1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 Actual Thread O.D. mm in 8.1 0.32 10.4 0.41 13.7 0.54 17.3 0.68 21.6 0.85 26.7 1.05 33.5 1.32 42.2 1.66 48.3 1.
Specifications NT 855 Decimal and Metric Equivalents Page 18-7 Decimal and Metric Equivalents Metric mm Decimal in. 0.39688 0.015625 0.79375 Fractions Metric mm Decimal in. Fractions 1/64 13.09687 0.515625 33/64 0.03125 1/32 13.49375 0.53125 17/32 1.19062 0.046875 3/64 13.89062 0.546875 35/64 1.58750 0.0625 1/16 14.28750 0.5625 1.98437 0.078125 5/64 14.68437 0.578125 37/64 2.38125 0.09375 3/32 15.08125 0.59375 19/32 2.77812 0.109375 7/64 15.47812 0.
Specifications - General Information Page 18-8 Specifications NT 855 Specifications - General Information The specifications in this section are organized in the same sequence used in each group of this manual. The minimum and maximum tolerance limit specifications are listed in both metric and U.S. Customary dimensions. The assembly and rebuild specifications and torque values are provided to make sure the parts are correctly assembled, fit correctly, and are secured with the correct torque value.
Specifications NT 855 Part or Assembly Engine Assembly - Specifications Page 18-9 Ref. Point mm in Engine Assembly - Specifications Cylinder Liner Protrusion 0.10 0.18 MIN MAX 0.004 0.007 Cylinder Liner to Lower Cylinder Liner Bore Clearance 0.05 0.15 MIN MAX 0.002 0.006 Cylinder Liner Out of Round 0.05 MAX 0.002 Crankshaft End Clearance 0.18 0.45 MIN MAX 0.007 0.018 SAE No. 00 0 1/2 1 2 3 787.7 648.0 584.4 511.3 447.8 409.7 MAX MAX MAX MAX MAX MAX 31.01 25.51 23.01 20.13 17.63 16.
Engine Assembly - Specifications Page 18-10 Part or Assembly Specifications NT 855 Ref. Point mm in Piston Ring Gap Piston • Top 0.43 MIN 0.017 0.68 MAX 0.027 • Second 0.51 MIN 0.020 0.76 MAX 0.030 • Third 0.48 MIN 0.019 0.74 MAX 0.029 • Oil 0.25 MIN 0.010 0.64 MAX 0.025 Note: Add 0.08 mm [0.003-inch] to the maximum limit for each 0.03 mm [0.001-inch] wear in the cylinder liner wall.
Specifications NT 855 Part or Assembly Engine Assembly - Specifications Page 18-11 Ref. Point mm in Accessory Drive Assembly Timing Position the accessory drive shaft dowel pin at the 12:00 o’clock position. Align the timing mark on the accessory drive gear with the timing mark on the camshaft gear. Backlash Between the Accessory 0.05 MIN Drive and the Camshaft Gear 0.50 MAX Note: If the backlash is not within specifications, the gear must be replaced. 0.002 0.020 Backlash Between the Lubricating 0.
Engine Assembly - Specifications Page 18-12 Part or Assembly Specifications NT 855 Ref. Point mm in PTD Top-Stop Injector Adjustment Refer to Engine Assembly, Group 00, PTD Top-Stop Injector Adjustment, Page 0-129. PTD STC Injector Adjustment Refer to Engine Assembly, Group 00, PTD STC Injector Adjustment, Page 0-133. Intake Valve Lash Specifications Exhaust Valve Lash Specifications 0.28 0.58 MIN MIN 0.011 0.
Specifications NT 855 Engine Assembly - Specifications Page 18-13 Part or Assembly Ref. Point Belt Tension Water Pump Belt (Big Cam IV and New Big Cam IV) • New Belt Tension • Used Belt Tension Ref. Point Belt Tension Water Pump Belt (88 Big Cam IV) • New Belt Tension • Used Belt Tension Ref. Point Belt Tension Fan Belts • New Belt Tension • Used Belt Tension Ref. Point Belt Tension Alternator Belts • New Belt Tension • Used Belt Tension Ref.
Engine Assembly - Capscrew Torque Values Page 18-14 Part or Assembly Specifications NT 855 Step Torque Values N•m ft-lb Engine Assembly - Capscrew Torque Values Adapter Plate to Rebuild Stand 100 Mounting Plate Adapter to Rear Water Header, if Removed 9 75 7 Adapter Plate Mounting Capscrews • 3/8-inch 40 • 1/2-inch 100 • 5/8-inch 100 Note: Tighten all the adapter plate mounting capscrews in the sequence shown.
Specifications NT 855 Part or Assembly Flywheel Housing Note: Tighten in the sequence shown. Engine Assembly - Capscrew Torque Values Page 18-15 Step Connecting Rod Capscrews Note: Tighten the connecting rod capscrews in alternating sequence. Cylinder Head Note: Tighten in the sequence shown. Repeat steps 1, 2, and 3 to install each cylinder head.
Engine Assembly - Capscrew Torque Values Page 18-16 Specifications NT 855 Torque Values N•m 25 ft-lb 20 420 310 70 50 Vibration Damper Capscrew Size: 5/8-inch; SAE grade No. 8 260 190 Flywheel 270 200 45 35 Part or Assembly Camshaft Bearing Support Step Accessory Drive Pulley Front Engine Support Bracket Note: Tighten the capscrews in a star pattern.
Specifications NT 855 Part or Assembly Injectors (PTD-Top Stop) Engine Assembly - Capscrew Torque Values Page 18-17 Step • New Big Cam IV and 88 Big Cam IV Torque Values N•m 34 ft-lb 25 Note: For New Big Cam IV and 88 Big Cam IV engines (3/8-inch - 16 capscrews), tighten the capscrews alternately and evenly, 11 N•m [8 ft-lb] torque one at a time to a final torque of 34 N•m [25 ft-lb]. Injectors (PTD-STC) Fuel Crossovers 54 4 40 35 in-lb Crossheads - Lock Nut • Less JacobsW Brake: ..
Engine Assembly - Capscrew Torque Values Page 18-18 Part or Assembly Injector Lock Nut Specifications NT 855 Step • With torque wrench adapter, Part No. ST-669 • Without adapter Torque Values N•m ft-lb 45 60 35 45 0.68 6 in-lb • With torque wrench adapter, Part No. ST-669 • Without adapter 45 60 35 45 Cummins C Brake Nuts 90 65 Cummins C Brake Lock Nut 24 18 JacobsW Hold Down Nuts Note: Tighten the nuts in the sequence shown.
Specifications NT 855 Part or Assembly Rocker Housing Covers • Big Cam IV/New Big Cam IV • 88 Big Cam IV Note: Tighten in the sequence shown. Engine Assembly - Capscrew Torque Values Page 18-19 Step Torque Values N•m ft-lb 20 16 15 12 Oil Pan (7/16-inch Mounting Capscrews) 20 15 Note: Tighten one of the 7/16-inch oil pan mounting capscrews on each side of the oil pan, halfway between the front and the rear of the oil pan. Oil Pan • Four 5/16-inch capscrews in rear of the oil pan.
Engine Assembly - Capscrew Torque Values Page 18-20 Part or Assembly Fuel Pump Support Bracket to Cylinder Block Mounting Capscrews Fuel Tubing Tube Size 1/4-inch 5/16-inch 3/8-inch 1/2-inch STC Oil Control Valve STC Oil Control Valve Hoses Hose Size No. 4 No. 6 No.
Specifications NT 855 Part or Assembly Water Pump (Big Cam IV and New Big Cam IV) Engine Assembly - Capscrew Torque Values Page 18-21 Step Torque Values N•m 15 30 45 ft-lb 10 20 35 Note: Tighten the capscrews in the sequence shown. Water Pump (88 Big Cam IV) Idler Pulley Support Bracket 15 10 30 20 45 35 Note: The two capscrews which mount the idler pulley support bracket are longer than the other four water pump capscrews.
Engine Assembly - Capscrew Torque Values Page 18-22 Part or Assembly Water Pump Belt (88 Big Cam IV) • New Belt Tension • Used Belt Tension Specifications NT 855 Step Torque Values N•m 620 N 270-490 N ft-lb 140 lbf 60-110 lbf Note: A belt is considered used if it has been in operation for more than 10 minutes. If used belt tension is below the minimum, tighten to the maximum value.
Specifications NT 855 Part or Assembly Hand Hole Cover Engine Assembly - Capscrew Torque Values Page 18-23 Step Torque Values N•m 45 ft-lb 35 Coolant Filter Head (88 Big Cam IV) 45 35 Thermostat Housing (Big Cam IV and New Big Cam IV) 45 35 Thermostat Housing (88 Big Cam IV) 45 35 Thermostat (Reserve Flow Cooling) Big Cam IV, New Big Cam IV, and NTC-444 Only 12 110 in-lb Thermostat (Reserve Flow Cooling) Big Cam IV, New Big Cam IV, and NTC-444 Clamps 5 40 in-lb 45 35 Thermostat (Reserve
Engine Assembly - Capscrew Torque Values Page 18-24 Part or Assembly Thermostat (Reserve Flow Cooling) Rear Hold Down Strap Capscrew Specifications NT 855 Step Torque Values N•m ft-lb 110 80 Oil Cooler Assembly (Big Cam IV and New Big Cam IV) 45 35 Cooler Brace 10 8 Oil Cooler Assembly (88 Big Cam IV) 45 35 Support Bracket to Cylinder Block (2) Support Bracket to Rear Oil Cooler Cover (1) 45 35 45 35 Water Header Covers 12 110 in-lb 5 40 in-lb Water Transfer Hose* Clamps *On engines
Specifications NT 855 Part or Assembly Water Transfer Tube (Big Cam IV and New Big Cam IV) Engine Assembly - Capscrew Torque Values Page 18-25 Step Torque Values N•m ft-lb • Retaining Clip 25 20 Water Transfer Housing to Thermostat Housing 25 20 Water Transfer Tube (88 Big Cam IV) Hose Clamps 45 5 35 40 in-lb Water Fill Tube (88 Big Cam IV Only) 45 35 5 40 in-lb 12 110 in-lb 5 40 in-lb Aftercooler Coolant Inlet and Outlet Tubes (Big Cam IV and New Big Cam IV) • Clamps Aftercooler Cool
Engine Assembly - Capscrew Torque Values Page 18-26 Part or Assembly Aftercooler Coolant Inlet and Outlet Tubes (88 Big Cam IV) • Hose Clamps (1) and (2) Specifications NT 855 Step Torque Values N•m ft-lb 5 40 in-lb 12 110 in-lb 5 40 in-lb • Steel Tube Nuts 12 110 in-lb Aftercooler Vent Tube (88 Big Cam IV) • Tube nuts 12 110 in-lb 45 80 35 60 45 8 35 70 in-lb Aftercooler Coolant Inlet and Outlet Tubes (88 Big Cam IV) • Capscrew Aftercooler Vent Tube (Big Cam IV and New Big Cam IV) • Ru
Specifications NT 855 Part or Assembly Air Crossover Tube Support Clamp(s) Engine Assembly - Capscrew Torque Values Page 18-27 Step Torque Values N•m 20 ft-lb 15 Turbocharger • Capscrews • Hose Clamps 45 5 35 40 in-lb Turbocharger Oil Supply Hose Swivel Nuts 35 25 Bypass Oil Filter Return Tube Swivel Nuts 35 25 5 40 in-lb 12 110 in-lb 45 35 Hose Clamps Note: Tighten the hose clamps on Big Cam IV engines which have the bypass oil filter return tube plumbed into the turbocharger oil drain t
Engine Assembly - Capscrew Torque Values Page 18-28 Part or Assembly Alternator Belts • New Belt Tension • Used Belt Tension Note: A belt is considered used if it has been in operation for more than 10 minutes.
Specifications NT 855 Part or Assembly Cylinder Block - Rebuild Specifications Page 18-29 Ref. Point mm in Cylinder Block - Rebuild Specifications Cylinder Block Height 421.87 422.45 MIN MAX 16.609 16.632 Upper Press Fit Design Counterbore Diameter • Standard • Oversize Lower Press Fit Design Counterbore Diameter 166.662 - 166.713 167.170 - 167.220 6.5615 - 6.5635 6.5815 - 6.5835 • Standard • Oversize 166.725 - 166.878 167.741 - 167.894 6.5640 - 6.5700 6.6040 - 6.
Cylinder Block - Rebuild Specifications Page 18-30 Part or Assembly Cylinder Block Camshaft Bore I.D. Cylinder Liner Protrusion Specifications NT 855 Ref. Point mm in 68.237 68.262 MIN MAX 2.6865 2.6875 0.10 0.18 MIN MAX 0.004 0.007 Counterbore Sealing Ring Thickness • Standard Lower Press Fit or Upper Press Fit Liners • Oversize Lower Press Fit Liners Cylinder Liner I.D. 0.18 0.20 0.23 0.48 0.51 0.53 0.79 1.57 0.007 0.008 0.009 0.019 0.020 0.021 0.031 0.062 0.46 0.51 0.56 0.018 0.020 0.
Specifications NT 855 Part or Assembly Cylinder Block - Rebuild Specifications Page 18-31 Ref. Point mm in Liner O.D. (Lower Press Fit Area) Upper Press Fit Design • Standard • .020 Oversize 159.86 159.99 159.86 159.99 MIN MAX MIN MAX 6.294 6.299 6.294 6.299 159.91 159.96 160.93 160.98 MIN MAX MIN MAX 6.296 6.298 6.336 6.338 9.01 9.04 9.27 9.29 MIN MAX MIN MAX 0.355 0.356 0.365 0.366 9.01 9.04 9.52 9.55 MIN MAX MIN MAX 0.355 0.356 0.375 0.376 Liner O.D.
Cylinder Block - Rebuild Specifications Page 18-32 Part or Assembly Piston Pin Bore Specifications NT 855 Ref. Point mm 50.762 50.800 in MIN MAX 1.9985 2.0000 50.762 MIN 50.775 MAX Note: Discard the piston pin if it is more than 0.03 mm [0.001-inch] out of round. 1.9985 1.9990 Piston Pin O.D. Crankshaft Oil Seal Wear Groove 0.25 MAX 0.010 95.504 95.522 MIN MAX 3.7600 3.7607 Crankshaft Front Oil Seal Area O.D. 92.07 92.10 MIN MAX 3.625 3.626 Crankshaft Rear Oil Seal Area O.D. 152.35 152.
Specifications NT 855 Part or Assembly Crankshaft Main Bearing Journal O.D. Cylinder Block - Rebuild Specifications Page 18-33 Ref. Point mm in 114.237 114.300 MIN MAX 4.4975 4.5000 76.23 76.28 MIN MAX 3.001 3.003 Crankshaft Gear Bore I.D. 95.394 95.415 MIN MAX 3.7557 3.7565 Crankshaft Gear Fit Area O.D. 95.504 95.522 MIN MAX 3.7600 3.7607 92.10 92.17 MIN MAX 3.626 3.629 35.013 35.052 MIN MAX 1.3785 1.
Cylinder Block - Rebuild Specifications Page 18-34 Part or Assembly Specifications NT 855 Ref. Point mm in Main Bearing Shell Thickness (Standard) 3.086 3.145 MIN MAX 0.1215 0.1238 Thrust Bearing Thickness 6.210 6.286 MIN MAX 0.2445 0.2475 Connecting Rod Bearing Thickness (Standard) 2.362 2.405 MIN MAX 0.0930 0.0947 Connecting Rod Capscrew O.D. 14.81 14.99 MIN MAX 0.583 0.590 Connecting Rod Crankshaft Bore I.D. 84.219 84.244 MIN MAX 3.3157 3.3167 Piston Pin Bushing I.D. 50.825 50.
Specifications NT 855 Part or Assembly Cylinder Block - Rebuild Specifications Page 18-35 Ref. Point mm in Connecting Rod - Twist: • (Without Bushing) • (With Bushing) 0.50 0.25 MAX MAX 0.020 0.010 The instructions for performing a magnetic crack inspection of the connecting rod is provided in Group 01. Refer to Connecting Rods - Magnetic Inspection (01-15), Page 1-109. Camshaft Bushing Journal O.D. Camshaft Thrust Washer Thickness 63.37 63.42 MIN MAX 2.495 2.497 2.29 2.49 MIN MAX 0.090 0.
Cylinder Block - Rebuild Specifications Page 18-36 Part or Assembly Crankshaft Pulley I.D. Specifications NT 855 Ref. Point mm 35.05 35.10 in MIN MAX 1.380 1.382 Vibration Damper Thickness Measure the thickness in four places 90 degrees apart approximately 3.18 mm [0.125 inch] from the outside diameter. The difference between any two of the four measurements must not exceed 0.25 mm [0.010 inch]. Accessory Drive Seal Bore I.D. 80.962 81.038 MIN MAX 3.1875 3.1905 120.611 120.688 MIN MAX 4.7485 4.
Specifications NT 855 Part or Assembly Cylinder Block - Torque Values Page 18-37 Step Torque Values N•m ft-lb Cylinder Block - Torque Values Cylinder Block Pipe Plugs • 1/4-inch • 3/8-inch 20 25 15 20 25 15 20 10 20 25 15 20 90 65 1 2 3 4 5 6 7 150 285 415 Loosen All 150 285 415 110 210 305 1 2 3 4 5 6 7 120 230 345 Loosen All 120 230 345 90 170 255 90 170 255 100 230 75 170 Cylinder Block Pipe Plugs • 3/8-inch • 1/8-inch Cylinder Block Pipe Plugs • 1/4-inch • 3/8-inch Cylinder Block
Cylinder Head - Rebuild Specifications Page 18-38 Part or Assembly Specifications NT 855 Ref. Point mm in Cylinder Head - Rebuild Specifications Cylinder Head Flatness Per 25.4 mm [1.00 in.] of Length Cylinder Head Flatness (Total Overall Length) 0.020 0.08 MAX MAX 0.0008 0.003 109.85 111.25 MIN MAX 4.325 4.380 68.20 66.93 Nominal Nominal 2.685 2.635 43.79 42.44 Nominal Nominal 1.724 1.671 • Valve Spring Part No. 211999 295 N 326 N MIN MAX 66.5 lbf 73.5 lbf • Valve Spring Part No.
Specifications NT 855 Part or Assembly Cylinder Head - Rebuild Specifications Page 18-39 Ref. Point Valve Guide Height (Installed) mm in 32.26 32.51 MIN MAX 1.270 1.280 10.975 11.011 MIN MAX 0.4321 0.4335 47.25 47.75 MIN MAX 1.860 1.880 1.60 3.18 MIN MAX 0.063 0.125 Injector Tip Protrusion 1.52 1.78 MIN MAX 0.060 0.070 Valve Seat to Valve Guide Concentricity (Per 360 Degrees) 0.09 MAX 0.0035 2.67 4.19 1.40 2.16 MIN MAX MIN MAX 0.105 0.165 0.055 0.085 Crosshead Guide O.D.
Cylinder Head - Rebuild Specifications Page 18-40 Part or Assembly Specifications NT 855 Ref. Point mm in Valve Seat Width Limit 1.60 3.18 MIN MAX 0.063 0.125 Valve Guide Bore I.D. 19.05 19.07 MIN MAX 0.750 0.751 19.088 19.101 MIN MAX 0.7515 0.7520 32.26 32.51 MIN MAX 1.270 1.280 11.494 11.557 MIN MAX 0.4525 0.4550 7.24 7.37 MIN MAX 0.285 0.290 50.787 50.813 MIN MAX 1.9995 2.0005 Valve Guide O.D. Valve Guide Height (Installed) Valve Guide I.D.
Specifications NT 855 Part or Assembly Cylinder Head - Rebuild Specifications Page 18-41 Ref. Point Crosshead Guide Bore I.D. Crosshead Guide Height (Installed) Valve Head Thickness (at O.D.) Injector Tip Protrusion: mm in 10.947 10.972 MIN MAX 0.4310 0.4320 47.25 47.75 MIN MAX 1.860 1.880 2.90 MIN 0.114 1.52 1.78 MIN MAX 0.060 0.070 11.91 1.52 Approx. MIN 0.469 0.
Cylinder Head - Rebuild Specifications Page 18-42 Part or Assembly Valve Crosshead Stem Pocket to Pad Face Specifications NT 855 Ref. Point mm 1 9.65 10.16 in MIN MAX 0.380 0.
Specifications NT 855 Cylinder Head - Torque Values Page 18-43 Part or Assembly Step Torque Values N•m ft-lb Cylinder Head - Torque Values Install the Injectors into the Cylinder Head Capscrew Timing Size Fixed 5/16 6 12 18 14 24 34 48 4 9 13 10 18 25 35 Injector Sleeve Puller Small Nut 65 50 Injector Sleeve Holding Tool Nut Note: This torque value is for installing new injector sleeves. Refer to Cylinder Head Replacing the Injector Sleeves (02-07), page No. 2-30.
Rocker Lever Housing Assembly - Rebuild Specifications Page 18-44 Part or Assembly Specifications NT 855 Ref. Point mm in Rocker Lever Housing Assembly - Rebuild Specifications Rocker Lever Bushing Bore I.D. (Installed) • Pre-88NT • 88NT 28.562 28.666 34.886 34.988 MIN MAX MIN MAX 1.1245 1.1286 1.3735 1.3775 28.490 28.540 34.810 34.860 MIN MAX MIN MAX 1.1215 1.1235 1.3705 1.3725 16.002 16.052 MIN MAX 0.630 0.632 30.15 30.17 36.47 36.50 MIN MAX MIN MAX 1.187 1.188 1.436 1.
Specifications NT 855 Part or Assembly Rocker Lever Housing Assembly - Torque Values Page 18-45 Step Torque Values N•m ft-lb Rocker Lever Housing Assembly - Torque Values Rocker Lever Shaft Set Screw 11 100 in-lb Note: The 80-degree tilt engines use spray nozzles instead of set screws in the rocker lever housings. Spray nozzles must be aligned with valve spring spray nozzle locator, Part No. ST-1182.
Cam Follower Assembly - Rebuild Specifications Page 18-46 Part or Assembly Specifications NT 855 Ref. Point mm in Cam Follower Assembly - Rebuild Specifications Fixed Injection Timing Cam Follower Roller Side Clearance 0.23 0.61 MIN MAX 0.009 0.024 Cam Follower Roller to Pin Clearance 0.08 0.20 MIN MAX 0.003 0.008 19.052 19.100 MIN MAX 0.7501 0.7520 Cam Follower Shaft O.D. 19.00 19.02 MIN MAX 0.748 0.749 Cam Follower Shaft Bore I.D. 19.02 19.05 MIN MAX 0.749 0.
Specifications NT 855 Part or Assembly Cam Follower Assembly - Rebuild Specifications Page 18-47 Ref. Point mm in Valve Lever Bushing or Bore I.D. 19.052 19.100 MIN MAX 0.7501 0.7520 Injector Lever Bushing I.D. 34.963 35.011 MIN MAX 1.3765 1.3784 1 34.900 34.920 MIN MAX 1.3740 1.3748 2 19.029 19.055 MIN MAX 0.7492 0.7502 19.00 19.02 MIN MAX 0.748 0.749 19.062 19.113 MIN MAX 0.7505 0.7525 Actuator Shaft Bore I.D. 19.05 19.15 MIN MAX 0.750 0.754 Actuator Shaft O.D. 18.95 19.
Cam Follower Assembly - Rebuild Specifications Page 18-48 Part or Assembly Specifications NT 855 Ref. Point mm in Actuator Shaft Guide I.D. 19.28 19.35 MIN MAX 0.759 0.762 Actuator Plunger O.D. 49.60 49.78 MIN MAX 1.953 1.960 Timing Spacer Length Part No. 3021515 3024029 3024030 MIN 35.43mm [1.395in] 30.86mm [1.215in] 37.72mm [1.485in] Timing Spacer Flange Thickness 3.81 4.06 Actuator Spring Free Length MAX 35.68mm [1.405in] 31.11mm [1.225in] 37.97mm [1.495in] MIN MAX 0.150 0.160 105.
Specifications NT 855 Part or Assembly Cam Follower Shaft From Housing Extension Dimension Cam Follower Assembly - Rebuild Specifications Page 18-49 Ref. Point mm in 23.25 23.75 MIN MAX 0.915 0.935 25.30 25.40 MIN MAX 0.996 1.000 Actuator Housing Cylinder Bore I.D. 56.97 57.02 MIN MAX 2.243 2.245 Actuator Housing Cylinder Sleeve O.D. 57.05 57.15 MIN MAX 2.246 2.250 Valve Lever Roller Pin Bore I.D. 12.674 12.687 MIN MAX 0.4990 0.4995 Injector Lever Roller Pin Bore I.D. 17.759 17.
Cam Follower Assembly - Rebuild Specifications Page 18-50 Part or Assembly Specifications NT 855 Ref. Point mm in Valve Roller Pin O.D. 12.692 12.700 MIN MAX 0.4997 0.5000 Injector Roller Pin O.D. 17.772 17.780 MIN MAX 0.6997 0.7000 0.23 0.61 MIN MAX 0.009 0.024 (1) Cam Follower Socket O.D. 19.063 19.088 MIN MAX 0.7505 0.7515 (2) Cam Follower Lever Bore I.D. 19.025 19.050 MIN MAX 0.7490 0.7500 0.013 0.064 MIN MAX 0.0005 0.
Specifications NT 855 Part or Assembly Cam Follower Assembly - Torque Values Page 18-51 Step Torque Values N•m ft-lb Cam Follower Assembly - Torque Values Cam Follower Shafts Locking Screws 2 15 in-lb Note: The heads of the locking screws must be flush or below flush with the gasket surface of the cam follower housing.
Fuel Pump - Rebuild Specifications Page 18-52 Part or Assembly Spring Retainer Lock Nut Specifications NT 855 Step Actuator Cap Torque Values N•m 45 40 ft-lb 35 30 Fuel Pump - Rebuild Specifications The disassembly, inspection, repair, assembly and calibration procedures for the fuel pump are covered in PT Fuel Pump Rebuilding and Calibration Instructions, Bulletin No. 3379084.
Specifications NT 855 Part or Assembly Lubricating Oil System - Capacities Page 18-53 Ref. Point U.S. Gallons Liters Lubricating Oil System - Capacities Oil Pan Capacity: • Automotive 30 35 Low High 8.0 9.5 22.7 Low 26.5 High Refer to Lubrication System Specifications, page 18-3, for additional specifications. 6.0 7.0 • Industrial Part or Assembly Ref. Point mm in Lubricating Oil Pump - Inspection Specifications Lubricating Oil Pump Drive Shaft End Clearance 0.05 0.13 MIN MAX 0.002 0.
Lubricating Oil Pump - Inspection Specifications Page 18-54 Part or Assembly Lubricating Oil Pump Body and Cover Bushing Bore I.D. Bushing I.D. (New) Specifications NT 855 Ref. Point mm in 25.387 25.413 MIN MAX 0.9995 1.0005 22.28 22.30 MIN MAX 0.877 0.878 Driven Gear Bushing Bore I.D. 25.387 MIN 0.9995 25.413 MAX 1.0005 Note: If the bushing bore inside diameter is not within specifications, the gear must be replaced. Bushing I.D. (New) 22.28 22.30 MIN MAX 0.877 0.878 Drive Gear Bore I.D.
Specifications NT 855 Part or Assembly Lubricating Oil System - Torque Values Page 18-55 Ref. Point Driven Shaft Press Fit Area O.D. Driven Shaft Protrusion Part or Assembly mm in 22.301 22.314 MIN MAX 0.8780 0.8785 17.90 18.67 MIN MAX 0.705 0.
Lubricating Oil System - Torque Values Page 18-56 Part or Assembly Oil Cooler Connection (Housing) to Support Capscrews (88 Big Cam IV) Specifications NT 855 Step Torque Values N•m ft-lb 45 35 45 35 6 50 in-lb 25 8 20 75 in-lb 20 15 Lubricating Oil Pump Cover to Body Capscrews 25 20 Oil Pressure Regulator Retainer Plug Capscrew 25 20 DFC Signal Line Adapter Elbow 11 100 in-lb Rear Cover to Oil Cooler Connection (Housing) Capscrews (88 Big Cam IV) Oil Cooler Core Holddown Clamp Nuts a
Specifications NT 855 Part or Assembly Water Pump Assembly - Rebuild Specifications Page 18-57 Ref. Point mm in Water Pump Assembly - Rebuild Specifications Water Pump Body Bearing Bore I.D. 61.991 62.017 MIN MAX 2.4406 2.4416 36.45 36.47 MIN MAX 1.435 1.436 15.85 15.88 MIN MAX 0.624 0.625 16.924 16.949 MIN MAX 0.6663 0.6673 15.85 15.88 MIN MAX 0.624 0.625 1 17.000 17.008 MIN MAX 0.6693 0.6696 2 25.001 25.011 MIN MAX 0.9843 0.9847 3 15.905 15.918 MIN MAX 0.6262 0.6267 1 15.
Fan Hub - Inspection Specifications Page 18-58 Part or Assembly Specifications NT 855 Ref. Point mm in Water Pump Idler Pulley Bearing Bore I.D. (Big Cam IV and New Big Cam IV) 61.996 62.012 MIN MAX 2.4408 2.4414 Idler Shaft O.D. (Big Cam IV and New Big Cam IV) 24.989 25.011 MIN MAX 0.9838 0.9847 Idler Pulley Bearing Bore I.D. (88 Big Cam IV) 51.961 51.986 MIN MAX 2.0457 2.0467 Bearing Spacer O.D. (88 Big Cam IV) 24.935 24.986 MIN MAX 0.9817 0.9837 0.08 0.25 MIN MAX 0.003 0.
Specifications NT 855 Part or Assembly Thermostat Housing Assembly - Rebuild Specifications Page 18-59 Ref. Point mm Inner Bearing Spacer Length (1) 50.78 50.82 MIN MAX 1.999 2.001 Outer Bearing Spacer Length (2) 50.67 50.75 MIN MAX 1.995 1.998 0.08 0.25 MIN MAX 0.003 0.010 Fan Hub End Clearance in Thermostat Housing Assembly - Rebuild Specifications Radiator Thermostat Seat Height (Big Cam IV and New Big Cam IV) 38.18 38.28 MIN MAX 1.503 1.507 • 49 State Engine (EPA Certified) 3.
Thermostat (Reserve Flow Cooling) - Operating Temperature Page 18-60 Part or Assembly Specifications NT 855 Ref. Point Bypass Thermostat Seat Counterbore Depth (Big Cam IV and New Big Cam IV) mm in 2.92 3.17 MIN MAX 0.115 0.125 44.462 44.513 MIN MAX 1.7505 1.7525 • 49 State Engine (EPA Certified) 6.35 6.48 MIN MAX 0.250 0.255 • 50 State Engine (EPA and CARB Certified) 7.87 7.92 MIN MAX 0.310 0.312 • 49 State Engine (EPA Certified) 3.18 3.56 MIN MAX 0.125 0.
Specifications NT 855 Part or Assembly Thermostat (Reserve Flow Cooling) - Operating Temperature Page 18-61 Ref. Point mm in Thermostat Rectangular Seal Bore Depth • Radiator Thermostat 5.03 5.13 MIN MAX 0.198 0.202 • Bypass Thermostat 5.03 5.13 MIN MAX 0.198 0.
Cooling System -Torque Values Page 18-62 Part or Assembly Specifications NT 855 Step Torque Values N•m ft-lb Cooling System -Torque Values Assembly of the Water Pump Idler (Flat Head Capscrew) 40 30 205 150 Filter Head Adapter in the Housing (Big Cam IV and New Big Cam IV) 45 35 Water Transfer Cover to Thermostat Housing (Big Cam IV and New Big Cam IV) 25 20 Bypass Thermostat Seat Cover (Big Cam IV and New Big Cam IV) 45 35 Fan Hub Lock Nut Note: Tighten the cover capscrews alternately so
Specifications NT 855 Part or Assembly Coolant Transfer Tube Clamp Capscrew (88 Big Cam IV) Cooling System -Torque Values Page 18-63 Step Torque Values N•m ft-lb 45 35 Coolant Filter Head Retaining Capscrew 20 15 Coolant Filter Element Adapter 45 35
Fuel Pump and Compressor Drive - Rebuild Specifications Page 18-64 Part or Assembly Specifications NT 855 Ref. Point mm in Fuel Pump and Compressor Drive - Rebuild Specifications Drive Shaft End Clearance 0.05 0.30 MIN MAX 0.002 0.012 33.43 33.55 MIN MAX 1.316 1.321 2.29 2.41 MIN MAX 0.090 0.095 1 34.963 34.976 MIN MAX 1.3765 1.3770 2 39.662 39.674 MIN MAX 1.5615 1.5620 3 33.274 33.325 MIN MAX 1.3100 1.3120 4 25.476 25.489 25.400 25.425 25.425 25.438 MIN MAX MIN MAX MIN MAX 1.
Specifications NT 855 Part or Assembly Fuel Pump and Compressor Drive - Torque Values Page 18-65 Ref. Point mm in Drive Gear Bore I.D. 39.730 39.751 MIN MAX 1.5642 1.5650 Drive Shaft Gear Fit Journal O.D. 39.789 39.814 MIN MAX 1.5665 1.5675 Drive Housing Bearing Bore I.D. 36.73 36.75 MIN MAX 1.446 1.447 50.77 50.82 MIN MAX 1.999 2.001 Accessory Drive Pulley Wear Sleeve Fit Area O.D.
Turbocharger - Inspection Specifications Page 18-66 Part or Assembly Specifications NT 855 Ref. Point mm in Turbocharger - Inspection Specifications Turbocharger Shaft End Clearance Model No. BHT3B/HT3B BHT4C/HT4B Turbocharger Compressor Impeller Radial Clearance Model No. BHT3B/HT3B BHT4C/HT4B 0.03 0.10 0.05 0.13 MIN MAX MIN MAX 0.001 0.004 0.002 0.005 0.15 0.46 0.15 0.46 MIN MAX MIN MAX 0.006 0.018 0.006 0.018 Turbocharger Turbine Wheel Radial Clearance Model No. BHT3B/HT3B 0.20 MIN 0.008 0.
Specifications NT 855 Part or Assembly Engine Testing - Test Specifications Page 18-67 Ref. Point mm in Engine Testing - Test Specifications Note: The specifications and instructions for testing the engine are provided this manual. Refer to Engine Testing - Group 14, Page 14-1. Vehicle Braking - Rebuild Specifications Note: The specifications and instructions for rebuilding the JacobsT Brake are provided in the JacobsT Brake Installation Manual. Refer to Vehicle Braking - Group 20, Page 20-1.
Vehicle Braking N14 Page 20-1 Section 20 - Vehicle Braking - Group 20 Section Contents Page Vehicle Braking General Information ...................................................................................................................................... 20-2 Cummins C Brake..................................................................................................................................... 20-2 JacobsW Engine Brake....................................................................
Vehicle Braking - General Information Page 20-2 Vehicle Braking N14 Vehicle Braking - General Information JacobsW Engine Brake For installation and adjustment of the JacobsT Engine Brake, Models 440 (STC engines) and 445 (CELECT™ engines), refer to the installation and parts manuals.
Component Manufacturers N14 Page C-1 Component Manufacturers NOTE: The following list contains addresses and telephone numbers of suppliers of accessories used on Cummins engines. Suppliers can be contacted directly for any specifications not covered in this manual. Air Cylinders Bendix Ltd. Douglas Road Kingswood Bristol England Telephone: 0272-671881 Catching Engineering 2101 Roberts Drive Broadview, IL 60153 Telephone: (312) 344-2334 Air Heaters Fleetguard, Inc.
Component Manufacturers N14 Page C-2 Fans Flexplates Governors Truflo Ltd. Westwood Road Birmingham B6 7JF England Telephone: 021-557-4101 Hayes-Albion 1999 Wildwood Avenue Jackson, MI 49202 Telephone: (517) 782-9421 Engineering Cooling Systems 201 W. Carmel Drive Carmel, IN 46032 Telephone: (317) 846-3438 Brookside McCordsville, IN 46055 Telephone: (317) 873-5093 Aerovent 8777 Purdue Rd.
Component Manufacturers N14 Torque Converters Twin Disc International S.A. Chaussee de Namur Nivelles Belgium Telephone: 067-224941 Twin Disc Clutch Co. Racine, WI 53403 Telephone: (414) 634-1981 Rockford Division Borg-Warner Corporation 1200 Windsor Road P.O.
Section L - Service Literature N14 Page L-1 Section L - Service Literature Section Contents Page Additional Service Literature ............................................................................................................................ L-2 Service Literature Ordering Location ............................................................................................................... L-3 Service Publications Order Form .....................................................................
Additional Service Literature Page L-2 Section L - Service Literature N14 Additional Service Literature The following publications can be purchased by filling in and mailing the Service Literature Order Form: Bulletin No.
Section L - Service Literature N14 Service Literature Ordering Location Page L-3 Service Literature Ordering Location Region Ordering Location United States and Canada Gannett Direct Marketing Services, Inc. 3400 Robards Court P. O. Box 34470 Louisville, KY 40232-4470 U.K., Europe, Mid-East, Africa, and Eastern European Countries Cummins Daventry Royal Oak Way South Northants, England NN11 5NU South and Central America (excluding Brazil and Mexico) Cummins Americas, Inc.
Service Publications Order Form Use this form for prompt handling of your literature order. Item Bulletin Number Title of Publication U.S. Price Each Quantity $ 1 Amount $ 2 3 4 5 6 Publications Total □ Payment Enclosed. Make certified check or money order payable to Cummins Engine Co. □ Please ship C.O.D. (U.S.A. only) Indiana Residents: Add 5% Sales Tax Handling & Shipping Chg: No. Items X $1.50 = Prices subject to change without notice.
Payment enclosed. Make certified check or money order payable to Cummins Engine Company, Inc. FROM: Name: Street Address: City: State: Zip Code: Country: SHIP TO: (Name and address where literature is to be shipped) Name: Street Address: City: State: Zip Code: Country: Please cut on the dotted line ---------------------------------------------------------------------------------------- Payment enclosed. Make certified check or money order payable to Cummins Engine Company, Inc.
Index Page X-1 Accessory Drive - Cleaning and Inspection for Reuse ........... 9-5 Cleaning ................................................................................. 9-5 Inspection ................................................................................ 9-5 Accessory Drive - Exploded View ........................................... 9-3 Accessory Drive - Installation ................................................ 0-89 Accessory Drive - Rebuild ...............................................
Index Page X-2 Camshaft Bore - Inspection .................................................... 1-15 Coolant Passage - Inspection ................................................ 1-21 Cylinder Block - Cleaning ...................................................... 1-11 Cylinder Block - Inspection .................................................... 1-20 Cylinder Head Capscrew Holes - Inspection ........................... 1-21 Main Bearing Bore Alignment - Measurement ........................
Index Page X-3 Inspection - CELECT™ Fuel Pump ........................................... 5-6 Inspection - PT Fuel Pump ...................................................... 5-4 Fuel Pump - General Information ............................................ 5-2 Fuel Pump - Installation ........................................................ 0-124 CELECT™ Engines ............................................................... 0-124 STC Engines ..................................................................
Index Page X-4 Piston and Connecting Rod Assemblies - Removal............... 0-40 Piston Cooling Nozzles - Installation .................................... 0-139 Piston Cooling Nozzles - Removal ......................................... 0-15 Pistons - Cleaning and Inspection.......................................... 1-41 Cleaning................................................................................. 1-41 Inspection ..............................................................................
NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST CLASS PERMIT NO. 15 • COLUMBUS, IN 47201 Postage Will Be Paid By Cummins Engine Company, Inc. Product Service Support Mail Code 80205 Box 3005 Columbus, IN 47202-3005 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Please fold on the dotted line Name Company Address: City State Country Zip Please note the Bulletin No.
Literature Survey Form We are always open to any suggestions or recommendations that will aid in improving our manuals. Use this postage paid survey form to evaluate this manual.
