TM 9-2350-311-34-1 DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, Ml 09A2 (EIC: 3EZ) (NSN 2350-01-031-0586) AND HOWITZER, MEDIUM, SELF-PROPELLED, 155 MM, Ml 09A3 (EIC: 3E2) (NSN 2350-01-031-8851) INTRODUCTION 1-1 GENERAL HULL MAINTENANCE 2-1 TROUBLESHOOTING 3-1 SEPARATION AND ASSEMBLY OF POWERPLANT COMPONENTS 4-1 FUEL AND AIR INTAKE SYSTEMS 5-1 COOLING SYSTEM 6-1
TM 9-2350-311-34-1 WARNING RADIOACTIVE MATERIAL(S) TRITIUM (HYDROGEN-3) GAS Handle with care. In the event the radioluminous source is broken, cracked, or there is no illumination, immediately wrap device in plastic bag (item 4, Appx B) and notify the local Radiation Protection Officer (RPO). Contact the base safety office for the name and telephone number of your local RPO: TELEPHONE: LOCAL RPO: SAFETY PROCEDURES FOR NUCLEAR REGULATORY COMMISSION (NRC) TRITIUM FIRE CONTROL DEVICES 1.
TM 9-2350-311-34-1 6. Further information: a. Requirements for safe handling and maintenance are located in TM 9-254, General Maintenance Procedures for Fire Control Materiel. b. If assistance is needed, contact your local or major command (MACOM) safety office(s) for information on safe handling, shipping, storage, maintenance, or disposal of radioactive devices. c. The AMCCOM RPO/licensee may be contacted by calling: DSN 793-2965/2969/2995, Commercial (309) 782-2965/2969/2995.
TM 9-2350-311-34-1 WARNING PAINT HAZARD Chemical Agent Resistant Coating (CARC) paint contains isocyanate, a constituent that can cause respiratory effects during and after the application of the material. During the application of CARC paint, coughing, shortness of breath, pain on respiration, increased sputum, and chest tightness may occur. CARC paint also produces itching and reddening of the skin, a burning sensation of the throat and nose, and watering of the eyes.
TM 9-2350-311-34-1 WARNING DRY-CLEANING SOLVENT HAZARD Dry=cleaning solvent (P-D-680) is toxic and flammable. Wear protective goggles and gloves and use only in a well-ventilated area. Avoid contact with skin, eyes, and clothes, and don’t breathe vapors. Do not use near open flame or excessive heat. The flashpoint for type #1 is 100°F (38°C), and for type #2 is 138°F (59°C. If you become dizzy while using dry-cleaning solvent, get fresh air immediately and seek medical aid.
TM 9-2350-311-34-1 WARNING ELECTRICAL HAZARD Ensure MASTER switch is off when working on hull electrical system to prevent injury due to electrical shock (FM 21-1 1). WARNING BATTERY HAZARD ● ● Batteries contain sulfuric acid that can cause severe bums. Avoid contact with skin, eyes, or clothing, and remove all metal or jewelry. If battery electrolyte is spilled, stop its burning effects immediately.
TM 9-2350-311-34-1 WARNING ROTATION HAZARD Protective fan screens must be installed prior to performing maintenance in the engine compartment when the engine is running or in ground hop mode. Contact with rotating fan can cause injury (FM 21-1 1). WARNING CRAWLING UNDER EQUIPMENT HAZARD Never crawl under equipment when performing maintenance unless the equipment is securely blocked. Keep clear of the equipment when it is being raised or lowered.
TM 9-2350-311-34-1 HEADQUARTERS DEPARTMENT OF THE ARMY Washington D. C., 19 September 1994 TECHNICAL MANUAL NO.
TM 9-2350-311-34-1 CONTENTS [CHAPTER 2-GENERAL HULL MAINTENANCE.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1] Section I REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT. . . . . . . . . . . . . . . . . . ...2-2 Section II GENERAL HULL MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-2 Section Ill CLEANING, PAINTING, AND LUBRICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 CONTENTS APPENDIX E-TORQUE LIMITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. O . . . . . . . . . . . . . . . . . . . E-1 APPENDIX F-MANDATORY Replacement mm... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1 INDEX . o . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 . ..0..0.09 . . . . . . . . . . . . . . . . . . . . . . . . . INDEX-1 I FOLDOUTS . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 HOW TO USE THIS MANUAL GENERAL This manual contains direct support and general support maintenance instructions for the M109A2/M109A3/M109A4/ Ml 09A5 Howitzers’ hull and hull-related components. The front matter in this manual consists of a cover index, general warnings, and a table of contents. This manua is divided into 10 chapters and 6 appendixes. Each chapter and appendix begins on a right page with the page number of 1.
TM 9-2350-311-34-1 c. Appendixes Appendix A provides titles of documents and publications referenced throughout this manual. Appendix B provides a list of the expendable and durable items necessary to perform the direct support and general support maintenance procedures. Appendix C provides a tool identification list of common tools necessary to perform the direct support and general support maintenance procedures. Appendix D provides an illustrated list of manufactured items.
TM 9-2350-311-34-1 LOCATIONAL TERMS The terms “front,” “rear,” “left,” and “right” are used to indicate where items are located on the howitzer. These locations are from the viewpoint of standing behind the howitzer and facing it. REFERENCING In this manual, internal referencing is done by chapter, appendix, paragraph, section, or task. For example, (para 8-15) refers you to Chapter 8, paragraph 15. Referencing outside this manual is done by the military document or publication number.
TM 9-2350-311-34-1 CHAPTER 1 INTRODUCTION GENERAL This chapter provides information to familiarize the mechanic with the Ml 09A2/M1 09A3/M1 09A4/M1 09A5 Medium, Self-Propelled Howitzer’s hull, powerplant, drive controls, tracks, suspension, and other hull-related components. This information is provided through a physical description of the major components, which the technician is required to maintain, service, inspect, replace, or repair.
TM 9-2350-311-34-1 M109A2 1-2
TM 9-2350-311-34-1 M109A3 1-3
TM 9-2350-311-34-1 1-4
TM 9-2350-311-34-1 SECTION 1. GENERAL INFORMATION 1-1 SCOPE This manual contains instructions for direct support and general support maintenance of the Ml 09A2/M109A3/M1 09A4/ Ml 09A5 Howitzer’s hull, powerplant, drive controls, tracks, suspension, and other hull-related components.
TM 9-2350-311-34-1 1-3 DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE — CONTINUED A second method is to close the breechblock, elevate the tube, and toss several thermite grenades down the tube. Elevate the tube so that the grenades will fall against the breechblock. This will melt the breech and the powder chamber, causing them to fuse together. 1-4 PREPARATION FOR STORAGE AND SHIPMENT Basic requirements for administrative storage are covered in TM 9-2350-311-20-2.
TM 9-2350-311-34-1 1-8 WARRANTY INFORMATION The Ml 09 Howitzer series is no longer warranted. 1-9 SAFETY, CARE, AND HANDLING WARNING Nuclear, Biological, and Chemical (NBC) agents can kill you. If NBC exposure is suspected, all air filter media must be handled by personnel wearing full NBCprotective equipment (FM 21-1 1).
TM 9-2350-311-34-1 1-10 CORROSION PREVENTION AND CONTROL (CPC) CPC of Army materiel is a continuing concern. It is important that any corrosion problems with this item be reported so that the problem can be corrected and improvements can be made to prevent the problem in future items. While corrosion is typically associated with rusting of metals, it can also\ include deterioration of other materials, such as rubber and plastic.
TM 9-2350-311-34-1 The powerplant consists of the following subsystems: a. Two engines are available: . Detroit Diesel 8V71T, model 7083-7398, diesel, liquid-cooled, V-8 engine, which generates 405 horsepower at 2300 rpm. . Detroit Diesel 8V71T, model 7083-7391, diesel, liquid-cooled, V-8 engine, which generates 440 horsepower at 2300 rpm. Drive control linkages to the transmission are steer control, shift control, and braking.
TM 9-2350-311-34-1 1-12 LOCATION OF MAJOR COMPONENTS 1-12.1 Location of Major Component NOTE Primary fuel filter on some vehicles is located inside engine compartment access door. LEGEND 1 External power receptacle (M109A4/M109A5) 2 Combat override switch (M109A4/M109A5) 3 Accessory control box 4 Cannoneer no.
TM 9-2350-311-34-1 1-11
TM 9-2350-311-34-1 1-12 LOCATION OF MAJOR COMPONENTS — CONTINUED 1.12.
TM 9-2350-311-34-1 1.12.2 Serial Number Locations NOTE • The M109A2, M109A3, M109A4, and M109A5 Howitzers have similar data plates. • Engine serial number and model are stamped on the right upper front comer of the cylinder block.
TM 9-2350-311-34-1 1-13 DIFFERENCES BETWEEN MODELS Differences between models exist (1) when comparing the M109A2 and Ml 09A3 Howitzers; (2) when comparing one M109A3 to another M109A3 Howitzer and (3) when comparing the M109A2/M109A3 and M1094/M1 09A5 Howitzers. 1-13.1 Hull Rear Doors The hull rear doors differ among the howitzers. Earlier versions have double doors and later versions have single doors. All Ml 09A2 Howitzers have single doors. 1-13.
TM 9-2350-311-34-1 1-13.10 Crew Compartment Subfloor Drains M109A4/M1 09A5 Howitzers have 13 subfloor drains installed. 1-14 EQUIPMENT DATA 1-14.1 General 6 crew lb (24,948 kg) .. Weight (combat loaded) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55,000 lb (23,587 kg) .. Weight (less crew, fuel, and stowage) . . . . . . . . .
1-16
TM 9-2350-311-34-1 1-17/(1-18 blank)
TM 9-2350-311-34-1 CHAPTER 2 GENERAL HULL MAINTENANCE GENERAL This chapter provides information and instructions needed to keep hull equipment and components in good repair. These instruction provide step-by-step and item-by-item illustrated text describing equipment, component service, and maintenance. References are also provided for maintenance-related procedures not within the scope of this manual (for example, welding).
TM 9-2350-311-34-1 SECTION 1. REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT 2-1 GENERAL “ Tools, equipment, and repair parts will be issued to direct support and general support maintenance personnel for maintenance. The tools and equipment issued should only be used for tasks in this manual. When not in use, these tools should be properly stowed. 2-2 COMMON TOOLS AND EQUIPMENT For authorized common tools and equipment, refer to the Modified Table of Organization and Equipment (MTOE).
TM 9-2350-311-34-1 During disassembly, tag critical parts such as shims, bearings, and electrical wiring harnesses and leads to make assembly procedures easier. Tagging is important for electrical equipment if circuit number tags are illegible or missing. CAUTION Never scribe-mark bearing surfaces Mark gears on mating teeth with scribe marks, dye, permanent ink, or paint to ensure correct positioning during assembly. Chalk or crayon markings should be avoided because they are not permanent.
TM 9-2350-311-34-1 2-8 REMOVING BURRS, SCRATCHES, AND RAISED METAL — CONTINUED Use a fine-mill file, sharpening stone (items 9 and 23, Appx C), or abrasive paper (item 12, Appx B) dipped in drycleaning solvent (item 7, Appx B) to remove burrs, scratches, or raised metal. When filing aluminum, clean file often to avoid lodging file with aluminum particles that could gouge work surface.
TM 9-2350-311-34-1 TABLE 2-1 THREAD INSERTS: DRILL SIZE AND DEPTH THREAD INSERT INTERNAL EXTERNAL THREAD THREAD 10-24 3/8-1 6 10-32 7/1 6-14 1/4-20 1/4-28 1/2-13 5/16-18 5/1 6-24 3/8-16 9/16-1 2 3/8-24 7/1 6-14 5/8-I 1 7/1 6-20 1/2-13 11/16 1/2-20 REMOVAL DRILL TAP DRILL DIAMETER COUNTERSINK DIAMETER Q 0.332 in. x 0.397 in. 0.453 in. 0.391 in. DIAMETER 0.281 in. DRILLING DEPTH 0.25 in. 0.453 in. 0.344 in. 0.25 in. 0.516 in. 0.406 in. 0.25 in. 0.516 in. 0.578 in. 0.469 in. 0.25 in. 0.
TM 9-2350-311-34-1 2-13 CLEANING — CONTINUED a. Cleaning of Materiel Received from Storage WARNING ● Breathing vapor form decreasing solutions can cause headache, dizziness, loss of muscular control, coma, permanent brain damage, or death. Ensure that area is well ventilated as a preventative measure. ● Dry-cleaning solvent (P-D-680) is toxic and flammable. Wear protective goggles and gloves and use only in a well-ventilated area. Avoid contact with skin, eyes, and clothes. Do not breath vapors.
TM 9-2350-311-34-1 2-14 PAINTING Refer to TM 9-2330-311-20-1 for painting instructions. 2-15 LUBRICATION Refer to TM 9-2350-311-10 and TM 9-2330-311-20-1 for lubrication instructions.
TM 9-2350-311-34-1 CHAPTER 3 TROUBLESHOOTING GENERAL This chapter provides the necessary information to quickly and accurately determine the cause of equipment malfunctions and direct you to procedures for the appropriate corrective action. It provides continued instructions when TM 9-2350-311 -20-1 refers to support maintenance for corrective action. Check the troubleshooting section of TM 92350 -311-20-1 and proceed as outlined.
TM 9-2350-311-34-1 3-1 GENERAL TROUBLESHOOTING INSTRUCTIONS The Quick Guide to Troubleshooting, the master reference table for locating troubleshooting solutions or references, contains a list of various malfunctions that may occur during operation or inspection of the M109A2/M109A3/M109A4/ Ml 09A5 Howitzer and provides a solution to these problems or references troubleshooting information in the Troubleshooting Chart or a technical manual.
TM 9-2350-311-34-1 SOLUTION OR REFERENCE ITEM ENGINE TRANSMISSION VIBRATES EXCESSIVELY Para 3-3a BLACK EXHAUST SMOKE IS PRESENT TM 9-2815-202-34 WHITE EXHAUST SMOKE IS PRESENT TM 9-2815-202-34 USES EXCESSIVE OIL TM 9-2815-202-34 HAS NO OR LOW OIL PRESSURE TM 9-2815-202-34 VIBRATES EXCESSIVELY Para 3-3b OVERHEATS TM 9-2520-234-35 VEHICLE DOES NOT DRIVE TM 9-2520-234-35 VEHICLE STEERS PROPERLY IN ONE DIRECTION ONLY TM 9-2520-234-35 AIR CLEANER BLOWER DO NOT OPERATE MOTORS Repair or rep
TM 9-2350-311-34-1 3-2 QUICK GUIDE TO TROUBLESHOOTING — CONTINUED ITEM COOLING SYSTEM ELECTRICAL SYSTEM FINAL DRIVE ASSEMBLY 3-4 PROBLEM SOLUTION OR REFERENCE ENGINE OVERHEATS Para 3-3d ENGINE COOLING FANS DO NOT OPERATE WHEN ENGINE IS RUNNING Check for broken, damaged, or defective fan driveshafts (para 6-4). COOLING FAN DRIVE ASSEMBLY DOES NOT MEET BACKLASH REQUIREMENT Adjust backlash as required (para 6-2). ELECTRICAL COMPONENTS INOPERATIVE Recharge or replace batteries (TM 9-6140200-14).
TM 9-2350-311-34-1 ITEM PROBLEM SUSPENSION SYSTEM OIL LEAKS FROM UPPER SPINDLE HOUSING SPINDLE HOUSING OVERHEATS SOLUTION OR REFERENCE Remove road wheel and road wheel arm from vehicle and inspect upper spindle housing for damage or cracks. Replace if damaged or cracked (para 8-2). Disassemble upper spindle housing. Replace damaged bearings or spacers (para 8-2).
TM 9-2350-311-34-1 3-3 TROUBLESHOOTING CHART a. ENGINE VIBRATES EXCESSIVELY References TM 9-2515-202-34 A I Inspect vibration damper (viscous) for damage. Is vibration damper (viscous) damaged? Replace vibration damper and verify that problem is solved (para 4-5). Inspect mass ring and coupler for damage. Is mass ring or coupler damaged? Repair or replace mass ring and coupler as required (para 4-4). Refer to TM 9-2515-202-34 for further troubleshooting procedures.
TM 9-2350-311-34-1 b. TRANSMISSION VIBRATES EXCESSIVELY References TM 9-2350-234-35 Check for loose or damaged transmission trunnion caps. Are transmission trunnion caps loose or damaged? Refer to TM 9-2350-234-35 for further Replace transmission trunnion caps (para 4-6).
TM 9-2350-311-34-1 3-3 TROUBLESHOOTING CHART — CONTINUED C. FLAME HEATER (ENGINE MODEL 7083-7396) TM 9-2815-202-34 Check flame heater solenoid for fuel flow. Is fuel flow non-existent or insufficient? Troubleshoot fuel return system (TM 9-2815-202-34). Repair flame heater solenoid (TM 9-2815-202-34).
TM 9-2350-311-34-1 d. COOLING SYSTEM ENGINE OVERHEATS TM 750-254 TM 9-2815-202-34 A Inspect radiator for leaks (TM 750-254). Does radiator leak? Repair or replace radiator as required and verify that problem is solved (TM 9-281 5-202-34). Check for defective engine coolant pump (TM 9-281 5-202-34). I Is engine coolant pump defective? Repair or replace coolant pump as required and verify that problem is solved (TM 9-2815-202-34).
TM 9-2350-311-34-1 3-3 TROUBLESHOOTING CHART — CONTINUED d. COOLING SYSTEM CONTINUED FROM STEP B Inspect cooling fans for damage (para 6-4). Are cooling fans damaged? Inspect, repair, or replace fan drive gearbox and fans as required (para 6-4).
TM 9-2350-311-34-1 e. PERSONNEL VENTILATION BLOWER INSUFFICIENT AIR CIRCULATION WITH BLOWER ON Disasemble personnel ventilation blower and check for seized bearings (para 9-1). Are bearings seized? Replace seized bearings and verify that problem is solved (para 9-1). Check radio noise filter assembly for continuity (para 9-1). Is continuity present? Replace personnel ventilating fan (para 9-1). Replace radio noise filter assembly (para 9-1).
TM 9-2350-311-34-1 3-3 TROUBLESHOOTING CHART — CONTINUED f. BILGE PUMP (1) PUMP DOES NOT OPERATE WHEN MASTER SWITCH AND BILGE PUMP SWITCH ARE IN ON POSITION D isassemble bilge pump and check brushes for damage or excessive wear (para 9-2). Are brushes damaged or excessively worn? Replace damaged or worn brushes and verify that problem is solved (para 9-2). Check field coil and rotor assembly for shorts (para 9-2).
TM 9-2350-311-34-1 f. BILGE PUMP (2) PUMP OPERATES, BUT DOES NOT PUMP SUFFICENT WATER Remove bilge pump from vehicle and check for clogged inlet screen (para 9-2). Is inlet screen clogged or obstructed? Clean inlet screen as required and verify that problem is solved (para 9-2). Check for clogged, bent, or damaged hoses. I Are hoses clogged, bent or damaged? WARNING Compressed air used for cleaning purposes must not exceed 30 psi (207 kPa).
TM 9-2350-311 -34-1 3-3 TROUBLESHOOTING CHART — CONTINUED f. BILGE PUMP (2) PUMP OPERATES, BUT DOES NOT PUMP SUFFICIENT WATER — CONTINUED CONTINUED FROM STEP B Check for bent or damaged impeller. Is impeller bent or damaged? Replace bilge pump (para 9-2). Repair or replace impeller as required (para 9-2).
TM 9-2350-311-34-1 g. ELECTRICAL SYSTEM ELECTRICAL COMPONENTS INOPERATIVE, DEFECTIVE RECTIFIER Tools Multimeter (item 16, Appx C) NOTE Rectifier repair information for M1 09A2/M109A3 Howitzers is covered in paragraph 7-15 and repair information for M1 09A4/M109A5 Howitzers is covered in paragraph 7-16. Refer toTM9-4910-571 12&P, DA PAM 750-33, and TM 9-6140-200-14 when troubleshooting electrical system. 1.
TM 9-2350-311-34-1 CHAPTER 4 SEPARATION AND ASSEMBLY OF POWERPLANT COMPONENTS GENERAL This chapter describes and illustrates procedures for separating the engine from the transmission and transfer, repairing the engine vibration damper, and matmg and installing transmission trunnion replacement caps. This chapter also identifies engine parts and accessories that are required to return an unserviceable, repairable engine to the overhaul depot for replacement.
TM 9-2350-311-34-1 4-1 SHIPPING AND STORAGE CONTAINERS AND ENGINE PARTS AND ACCESSORIES LIST NOTE Engine assembly, transmission assembly, and transfer assembly must be shipped and stored in their appropriate containers. Refer to TM 9-247 for preservation, storage, and shipment of ordnance material.
TM 9-2350-311-34-1 TRANSMISSION ASSEMBLY WITH SHIPPING AND STORAGE CONTAINER TRANSFER ASSEMBLY WITH SHIPPING AND STORAGE CONTAINER The following engine parts and accessories must be included when returning an unserviceable repairable engine to overhaul depot: NOTE Each assembly returned to overhaul depot must include component engine parts and accessories. Refer to TM 9-2350-311-24P-1, TM 9-2815-202-34, and TM 9-2815-20224P for reporting and requisitioning information and data.
TM 9-2350-311-34-1 4-2 REMOVAL AND INSTALLATION OF ENGINE- AND TRANSMISSION-RELATED COMPONENTS This task covers: a. Removal b.
TM 9-2350-311-34-1 4-5
TM 9-2350-311-34-1 4-2 REMOVAL AND INSTALLATION OF ENGINE- AND TRANSMISSION-RELATED COMPONENTS — CONTINUED a. Removal — Continued 7 Remove screw (15), flat washer (16), Iockwasher (17), and nut (18) at mounting bracket (19) to release tachometer cable (20) and speedometer cable (21 ) from mounting bracket. 8 Install screw (15), flat washer (16), Iockwasher (17), and nut (18) to mounting bracket (19). 9 Disconnect tachometer cable (20) from engine near generator.
TM 9-2350-311-34-1 4-7
TM 9-2350-311-34-1 4-2 REMOVAL AND INSTALLATION OF ENGINE- AND TRANSMISSION-RELATED COMPONENTS — CONTINUED a. Removal — Continued 20 Remove two adapters (49) from two secondary fuel filter elbows (50). 21 Remove adapter (51) at engine connector (52). 22 Disconnect elbow (53) from engine driven fuel pump (38). 23 Remove three screws (54), three flat washers (55), and three clamps (56). 24 Remove two tubes (57 and 58).
TM 9-2350-311-34-1 28 Loosen hose clamp (65). 29 Disconnect surge tank-to-coolant main tube hose (66) from coolant main tube (67). 30 Loosen two hose clamps (68). 31 Disconnect hose connector (69) from coolant pump (70). 32 Loosen two hose clamps (71) and remove two hoses (72) from two elbows (73) at crossover tube (74). 33 Remove two elbows (73) from crossover tube (74). 34 Loosen two hose clamps (75) at bypass thermostat housing (76). 35 Remove screw (77), Iockwasher (78), and clamp (79).
TM 9-2350-311-34-1 4-2 REMOVAL AND INSTALLATION OF ENGINE- AND TRANSMISSION-RELATED COMPONENTS — CONTINUED b. Installation WARNING Do not smoke or use open flame when working on fuel systems. An explosion may occur, causing severe injury or death. 1 Assemble powerplant (para 4-3). 2 Install two hose clamps (75) to coolant main tube-to-bypass thermostat housing connector hose (80). 3 Attach coolant main tube-to-bypass thermostat housing connector hose (80) and tighten two hose clamps (75).
TM 9-2350-311-34-1 4-11
TM 9-2350-311-34-1 4-2 REMOVAL AND INSTALLATION OF ENGINE- AND TRANSMISSION-RELATED COMPONENTS — CONTINUED b. Installation — Continued 18 Install primary fuel filter (36), two nuts (35), two new Iockwashers (34), two flat washers (33), and two screws (32). 19 Install primary fuel filter-to-engine-driven fuel pump tube (31 ). 20 Install sleeve (30) and nut (29) and connect primary fuel filter-to-engine-driven fuel pump tube (31 ) to primary fuel filter (36).
TM 9-2350-311-34-1 4-13
TM 9-2350-311-34-1 4-2 REMOVAL AND INSTALLATION OF ENGINE- AND TRANSMISSION-RELATED COMPONENTS — CONTINUED b. Installation — Continued 32 Install new Iockwasher (13) and screw (12) to attach transmission-to-oil cooler hose (11 ) to transmission housing (14). 33 Install hose connector (10) and connect transmission-to-oil cooler hose (11 ). Provide 0.63- to 0.87-in. (16.0- to 22.1 -mm) clearance between exhaust manifold (84) and hose (11 ). 34 Tighten four screws (8) to oil cooler housing (9).
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install oil sampling components (TM 9-2350-311-20-1 hroud and cooling fan assemblies (TM9-2350-311-20-1) Install alternator (TM 9-2350-311 -20-1) Install radiator and surge tank (TM9-2350-311-20-1) Fill engine and transmission oil coolant systems (TM9-2350-311-10) Install powerplant (TM 9-2350-311-20-1) 4-3 SEPARATION OF ENGINE FROM TRANSMISSION AND TRANSFER ASSEMBLY This task covers: a. Separation b.
TM 9-2350-311-34-1 4-3 SEPARATION OF ENGINE FROM TRANSMISSION AND TRANSFER ASSEMBLY — CONTINUED a. Separation — Continued CAUTION Use care to avoid damage to powerplant components during disassembly, cleaning, inspection, repair, and assembly. Nicks, scratches, and dents, resulting from careless handling, may cause oil leakage or improper functioning. This could result in transmission failure. All defective parts must be replaced.
TM9-2350-311-34-1 3 Remove 14 screws (7), 14 flat washers (8), and 14 Iockwashers (9). Discard Iockwashers. 4 Pull engine (10) away from transfer assembly (11). Remove gasket (12). Discard gasket. 5 Remove oil tubes (TM 9-2350-311-20-1). 6 Remove coolant hoses and tubes (TM 9-2350-311-20-1). 7 Remove remaining electrical wiring harnesses (TM 9-2350-311-20-1).
TM 9-2350-311-34-1 4-3 SEPARATION OF ENGINE FROM TRANSMISSION AND TRANSFER ASSEMBLY — CONTINUED b. Assembly WARNING Never crawl under equipment when performing maintenance unless equipment is securely blocked. Keep clear of equipment when it is being raised or lowered. Do not allow heavy components to swing while suspended by lifting device. Exercise extreme caution when working near a cable under tension. 1 Install coolant hoses and tubes to engine (TM 9-2350-311-20-1).
TM9-2350-311-34-1 NOTE See illustration below for proper screw lengths. 4 Install 14 new Iockwashers (9), 14 flat washers (8), and 14 screws (7). 5 Install six new Iockwashers (4), six flat washers (3), and six screws (2) to tie bar (5) at transmission (6). Torque six screws to 90-110 Ib-ft (122-149 N•m).
TM 9-2350-311-34-1 4-4 MASS RING AND COUPLER This task covers: a. Removal b. Inspection c. Installation Tools General mechanic’s tool kit (item 14, Appx C) Hammer (item 12, Appx C) Torque wrench (item 28, Appx C) Adhesive-sealant (item 3, Appx B) Seals (2) (item 1, Appx F) Engine and transmission separated (para 4-3) a. Removal 1 Remove 12 screws (1), mass ring (2), and coupler (3). 2 Remove seal (4). Discard seal. NOTE Step 3 applies to optional coupler.
TM 9-2350-311-34-1 3 Coat splined teeth with adhesive-sealant and install coupler (3) and mass ring (2). Check for 0.010-to 0.012-in. (0.25- to 0.30-mm) clearance between mass ring (2) and engine (8). If clearance exceeds 0.015 in. (0.38 mm), carefully strike high points with hammer. 4 Install 12 screws (1). Torque screws to 40-50 Ib-ft (54-68 N•m).
TM 9-2350-311 -34-1 4-5 CRANKSHAFT VIBRATION DAMPER This task covers: a. Removal b. Disassembly d. Assembly e. Installation Tools General mechanic’s tool kit (item 14, Appx C) Hammer (item 13, Appx C) Torque wrench (item 26, Appx C) Torque wrench (item 27, Appx C) c. Inspection Torque wrench (item 28, Appx C) Split cone (item 77, Appx F) a. Removal 1 Loosen bolt (1) approximately 0.125 in. (3.2 mm). 2 Strike bolt (1) with hammer to loosen spilt cone (2).
TM 9-2350-311-34-1 4-6 TRANSMISSION TRUNNION REPLACEMENT CAPS This task covers: a. Replacement Trunnion Cap Preparation b.
TM 9-2350-311-34-1 4-6 TRANSMISSION TRUNNION REPLACEMENT CAPS — CONTINUED a. Replacement Trunnion Cap Preparation 1 Locate and mark centerline of two support bolt holes (1) on front and rear of support (2). 2 Locate and mark center of replacement trunnion cap (3) on front and rear vertical face of cap. 3 With powerplant installed and transmission positioned in supports, place replacement trunnion cap (3) with insert (4) over support (2). Aline center mark on cap with hole center marks on support.
TM9-2350-311-34-1 4-25
TM 9-2350-311-34-1 4-6 TRANSMISSION TRUNNION REPLACEMENT CAPS — CONTINUED b. Replacement Trunnion Cap Installation 1 Aline transmission insert (4) in support (2) and replacement trunnion cap (3). 2 Install shims (5) (as required), replacement trunnion cap (3), two flat washers (7), and two bolts (8 and 9). Do not tighten. 3 Torque rear bolt (8) to 85-90 Ib-ft (115-122 N•m). 4 Torque forward bolt (9) to 85-90 Ib-ft (115-122 N•m).
TM 9-2350-311-34-1 CHAPTER 5 FUEL AND AIR INTAKE SYSTEMS GENERAL This chapter describes and illustrates procedures for disassembly, inspection, repair, assembly, and testing of the fuel and air intake systems. CONTENTS PAGE 5-1 ELECTRIC FUEL PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5-2 5-2 FUEL TANKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 5-1 ELECTRIC FUEL PUMPS This task covers: a. Disassembly Tools General mechanic’s tool kit (item 14, Appx C) Multimeter (item 16, Appx C) b. Inspection and Repair c.
TM 9-2350-311-34-1 a. Disassembly WARNING Do not smoke or use open flame when working on fuel systems. An explosion may occur, causing severe injury or death. NOTE ● Left and right electric fuel pumps have same basic components and are disassembled in same sequence. Right electric fuel pump has canted hanger plate and left electric fuel pump has elbow connector between check valve and hanger discharge fitting. For purposes of this manual, disassembly of left electric fuel pump will be discussed.
TM9-2350-311-34-1 5-1 ELECTRIC FUEL PUMPS — CONTINUED a. Disassembly — Continued 5-4 3 Remove three nuts (7), three Iockwashers (8), cover assembly (5), gasket (9), terminal plate (10), and gasket (11). Discard Iockwashers and gaskets. 4 Loosen nut (12) and remove nut (13) and serrated washer (14). 5 Remove discharge fitting (3) and preformed packing (15). Discard preformed packing. 6 Loosen clamp (16). 7 Remove hose (17) and clamp (16).
TM 9-2350-311-34-1 10 Pull latch (23) open. 11 Separate fuel pump (6) and hanger assembly (21). NOTE No further disassembly of fuel pump is possible. If fuel pump is defective, replace pump (TM 9-2350-311-20-1 ). b. Inspection and Repair WARNING Do not smoke or use open flame when working on fuel systems. An explosion may occur, causing severe injury or death. 1 Troubleshoot electric fuel pump (6) (TM 9-2350-311-20-1). 2 Inspect electric fuel pump housing (24). Replace if damaged or defective.
TM9-2350-311-34-1 5-1 ELECTRIC FUEL PUMPS — CONTINUED b. Inspection and Repair — Continued 4 Perform fuel flow test (TM 9-2350-311 -20-1 ). Replace pumps if not within performance specifications. 5 Inspect shielded electrical cable (4). Replace if shorted, torn, or frayed. 6 Test electrical cable (4) for continuity (TM 9-2350-311 -20-1 ). Replace if damaged. 7 Inspect ground lead (22). Replace if tom, frayed, damaged, or defective. 8 Test ground lead (22) for continuity (TM 9-2350-311 -20-1 ).
TM 9-2350-311-34-1 c. Assembly WARNING Do not smoke or use open flame when working on fuel systems. An explosion may occur, causing severe injury or death. NOTE Left and right electric fuel pumps have same basic components and are assembled in same sequence. Right electric fuel pump has canted hanger plate and left electric fuel pump has an elbow connector between check valve and hanger discharge fitting. For purposes of this manual, assembly of left fuel pump will be discussed.
TM 9-2350-311-34-1 5-1 ELECTRIC FUEL PUMPS — CONTINUED c. Assembly — Continued 5 Install hose (17) and clamp (16) to fuel pump (6). 6 Tighten clamp (16). 7 Install new preformed packing (15) and pump hanger discharge fitting (3). 8 Install serrated washer (14) and nut (13) to discharge fitting (3). 9 Tighten nut (12) back onto discharge fitting (3). 10 Install new gasket (11 ), terminal plate (10), new gasket (9), cover assembly (5), three new Iockwashers (8), and three nuts (7).
TM9-2350-311-34-1 11 Connect shielded electrical cable (4) to cover assembly (5) and install at fuel pump (6). NOTE Elbow connector is on left fuel pump only. 12 Install elbow connector (2) and check valve (1) at discharge fitting (3). 13 Perform fuel flow test (TM 9-2350-311-20-1).
TM 9-2350-311-34-1 5-2 FUEL TANKS This task covers: a. Removal General mechanic’s tool kit (item 14, Appx C) Adapter (item 1, Appx C) Fuel hose extension (item 8, Appx C) Lifting sling (item 22, Appx C) Suitable container(s) Torque wrench (item 28, Appx C) Coating, white (CARC) (item 6, Appx B) Dry-cleaning solvent (item 7, Appx B) Naphtha (item 11, Appx B) Plastic repair kit (for repairs over 1 in. [25.4 mm]) (item 17, Appx B) b. Repair co Installation Plastic repair kit (for repairs under 1 in.
TM 9-2350-311-34-1 (e) Detach adapter (1) and fuel hose extension (2) to main fuel line (3) at quick disconnect (4).
TM 9-2350-311-34-1 5-2 FUEL TANKS — CONTINUED 2 Remove engine exhaust outlet tube and pipe (6) (TM 9-2350-311 -20-1 ). 3 Remove air cleaner duct and elbow (7) (TM 9-2350-31 1-20-1). 4 Remove fuel tank heat shield (8) (TM 9-2350-311 -20-1 ). 5 Disconnect two electrical connectors (9) at fuel pumps (5) (TM 9-2350-311-20-1). 6 Disconnect two electrical connectors (10) at fuel level transmitters (11 ) (TM 9-2350-311-20-1). 7 Remove fuel level transmitters (11 ) (TM 9-2350-311-20-1).
TM 9-2350-311-34-1 11 Loosen turnbuckle (14) by reaching through filler opening (15). 12 Remove two screws (16), two flat washers (17), and retaining strap (18) at front of upper fuel tank (19). 13 Pull upper fuel tank (19) outward towards front of vehicle to clear hull recess, then lift out of hull. 14 Remove four screws (20), four flat washers (21 ), and two retaining straps (22). 15 Lift lower fuel tank (23) over engine mount assembly (24) and remove from vehicle.
TM 9-2350-311-34-1 5-2 FUEL TANKS — CONTINUED b. Repair WARNING ● Do not smoke or use open flames when removing tanks. Wear respirator and rubberized protective clothing when working on fiberglass. Fiberglass inhalation can cause severe respiratory problems. Fiberglass particles embedded in skin will cause irritation and possible infection. ● Immediately after working with fiberglass and resin, thoroughly wash any exposed skin surfaces. If fiber particles are imbedded in skin, do not scrub.
TM 9-2350-311-34-1 NOTE If damaged area is near opening in tank, apply backing plate with masking tape and release film, rather than using cloth wire. 6 Cut and trim piece of wire screen slightly larger than opening. If opening is less than 1 in. (25.4 mm) across at greatest point, wire screen is not required. 7 Cut glass cloth patches to size and shape. Cut first patch 0.5 in.
TM 9-2350-311-34-1 5-2 FUEL TANKS — CONTINUED b. Repair — Continued 13 Remove release film. 14 Repeat this procedure for application of second patch. 15 Saturate remaining patches with mixture without silica and apply to crater. 16 Allow completed patch to set undisturbed for 16 to 24 hours. NOTE Cure will be slow in temperatures below 70°F (21°C). However, during first hour of cure, temperature should not exceed 100°F (38°C).
TM 9-2350-311-34-1 WARNING ● Naphtha is flammable. Do not smoke or allow open flames in areas where naphtha is being used to avoid possible explosion or injury. • Dry-cleaning solvent (P-D-680) is toxic and flammable. Wear protective goggles and gloves and use only in a well-ventilated area. Avoid contact with skin, eyes, and clothes. Do not breath vapors. Do not use near open flame or excessive heat. The flashpoint for type #1 is 100°F (38°C), and for type #2 is 138°F (59°C).
TM 9-2350-311-34-1 5-2 FUEL TANKS — CONTINUED c. Installation 1 Lower lower fuel tank (23) into position behind engine mount assembly (24) and install shim washers under retaining straps as required. NOTE Steps 2 thru 4 apply to upper fuel tank. 2 Lower upper fuel tank (19) into hull and push towards rear of vehicle into hull recess. NOTE Access nut and screw from inside of vehicle. 3 Retract channel (25), hold nut (26), and loosen screw (27).
TM9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install powerplant (TM 9-2350-311-20-1) 5-19
TM 9-2350-311-34-1 5-3 FUEL TANK PADS This task covers: a. Removal b. Installation INITIAL SETUP Tools General mechanic’s tool kit (item 14, Appx C) Parts Adhesive (item 2, Appx B) Dry-cleaning solvent (item 7, Appx B) Sand paper (item 12, Appx B) Materials Equipment Conditions Fuel tanks removed (para 5-2) a. Removal NOTE Remove only pads that are defective and need replacement. 1 Remove hull mounted pads (1) as required. Discard pads.
TM 9-2350-311-34-1 b. Installation WARNING Dry-cleaning solvent (P-D-680) is toxic and flammable. Wear protective goggles and gloves and use only in a well-ventilated area. Avoid contact with skin, eyes, and clothes. Do not breath vapors. Do not use near open flame or excessive heat. The flashpoint for type #1 is 100°F (38°C), and for type #2 is 138°F (59°C). If you become dizzy while using dry-cleaning solvent, get fresh air immediately and obtain medical aid.
TM9-2350-311-34-1 5-4 FUEL TANK RETAINING STRAPS AND CHANNEL GROUP This task covers: a. Removal b. Disassembly c. Assembly d. Installation INITIAL SETUP Tools General mechanic’s tool kit (item 14, Appx C) Spring pin (item 2, Appx F) Equipment Conditons Materials/Parts Upper fuel tank removed (para 5-2) Cotter pin (item 12, Appx F) a. Removal 1 Remove cotter pin (1). Discard cotter pin. 2 Remove headed pin (2). 3 Remove three screws (3), three nuts (4), and three flat washers (5). 4.
TM 9-2350-311-34-1 5-23
TM 9-2350-311-34-1 5-4 FUEL TANK RETAINING STRAPS AND CHANNEL GROUP — CONTINUED c. Assembly 1 Install new pad (18), as required (para 5-3). 2 Connect turnbuckle (15) to side retaining strap (17) and top retaining strap (16). 3 Install new pad (19), as required (para 5-3). 4 Assemble new spring pin (20), stud (12), and nut (13) to channel (11). d. Installation 1 Install flat washer (14), nut (13), stud (12), and channel (11) through hull recess in engine compartment.
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install upper fuel tank (para 5-2) 5-5 AIR CLEANER BLOWER MOTORS This task covers: a. Disassembly b. Inspection, Repair, and Test c. Assembly d.
TM 9-2350-311-34-1 5-5 AIR CLEANER BLOWER MOTORS — CONTINUED a. Disassembly 5-26 1 Remove 10 screws (1), 10 Iockwasher (2), and motor cover (3). Discard Iockwasher. 2 Slide electrical lead insulator (4) away from connector (5). 3 Disconnect electrical lead (6) at connector (5). 4 Remove screw (7) and disconnect ground lead (8). Install screw to commutator end bell (9). 5 Remove motor assembly (10) and two seals (11). Discard seals.
TM 9-2350-311-34-1 6 Remove screw (12), Iockwasher (1), ground lead (8), and clip (14). Install screw (12), Iockwasher (13), and clip (14). 7 Remove four screws (15), four Iockwasher (16), capacitor lead assembly (17), and preformed packing (18). Discard Iockwasher and preformed packing. NOTE Disassemble only if leads or capacitor lead assembly needs replacing. 8 Disassemble capacitor lead assembly (17), unsoldering leads (19) to disconnect capacitor (20) (TB SIG 222).
TM 9-2350-311-34-1 5-5 AIR CLEANER BLOWER MOTORS — CONTINUED a. Disassembly — Continued 9 Remove self-locking nut (21). Unscrew impeller (22). Remove washers (23) (quantity will vary) and felt washer (24). Discard self-locking nut. NOTE Follow step 10 for removal of both brush assembly holders. 10 Remove three screws (25), three Iockwasher’s (26), electrical lead (6), spring (27), and brushes (28) from brush assembly holder (29). Discard Iockwashers. 11 Remove two screws (30) and two Iockwasher (31).
TM 9-2350-311-34-1 5-29
TM 9-2350-311-34-1 5-5 AIR CLEANER BLOWER MOTORS — CONTINUED b. Inspection, Repair, and Test — Continued 10 Test capacitor (20) for continuity. If resistance value is indicated on multimeter, replace capacitor. 11 Inspect impeller housing (39). Replace if cracked or damaged. 12 Inspect commutator end bell (9). Replace if cracked or damaged. 13 Inspect motor cover (3). Repair if cracked, dented, or damaged. Replace if beyond repair. c.
TM9-2350-311-34-1 5-31
TM 9-2350-311-34-1 5-5 AIR CLEANER BLOWER MOTORS — CONTINUED C. Assembly — Continued 9 Measure from motor cover (3) to end of impeller (22). Add or subtract washers as required to obtain 1.593-to 1.609-in. (4.046- to 4.087-cm) dimension. 10 Solder leads (19) to connect capacitor (20), assembling capacitor lead assembly (17). 11 Install new preformed packing (18), capacitor lead assembly (17), four new Iockwasher (16), and four screws (15).
TM 9-2350-311-34-1 13 Install two new seals (11) and motor assembly (10) to impeller housing (39). 14 Remove screw (7) and connect ground lead (8). Reinstall screw. 15 Connect electrical lead (6) to connector (5). 16 Slide electrical lead insulator (4) toward connector (5). 17 Install motor cover (3), 10 new Iockwasher (2), and 10 screws (1). 18 Bench test air cleaner blower motor assembly using 24-V power source. If working correctly, install in vehicle (TM 9-2350-311-20-1) and test.
TM9-2350-311-34-1 5-5 AIR CLEANER BLOWER MOTORS — CONTINUED d. Test 1 Remove motor cover. 2 Disconnect electrical lead. NOTE Steps 3 and 4 apply to M109A2/M109A3 Howitzers. Step 5 applies to M109A4/ M109A5 Howitzers. 3 Start engine and run at idle (TM 9-2350-311-10). 4 Turn on electrical systems. 5 Put vehicle in gear and turn MASTER switch on. 6 Perform electrical test as shown below. 7 Place red lead of multimeter in lead connector (6) and black lead to ground (8).
TM 9-2350-311-34-1 10 Air cleaner blower motors should meet the following performance specifications: (a) Rated voltage: 24 Vdc. (b) Blower load current: 7.5 amps maximum at 73°F (23°C) ambient temperature. (c) Blower load speed: 11,500 rpm 10% at 77° F (25°C) ambient temperature. For +10% voltage, maximum speed change of +10. For -10% voltage, maximum speed change of -10%. VOLTAGE* MAXIMUM AMPS CFM INLET VACUUM GAGE READING 24 5.5 0 minutes 14.0-in. (35.6-cm) water minimum 24 6.5 40 minutes 8.
TM9-2350-311-34-1 5-6 FUEL TANK HEAT SHIELD This task covers: a. Inspection and Repair INITIAL SETUP References Tools General mechanic’s tool kit (item 14, Appx C) TM 9-2350-311-20-1 TM 9-237 a. Inspection and Repair 1 Check fuel tank heat shield seals (1) for tearing or deterioration. Replace as required (TM 9-2350-311-20-1). 2 Check supports for cracks or damage. Weld to repair or replace as required (TM 9-237). 3 Check retainers for cracks, damage, or bent areas.
TM 9-2350-311-34-1 CHAPTER 6 COOLING SYSTEM GENERAL This chapter describes and illustrates procedures for removal, disassembly, inspection and test, repair, assembly, and installation of the cooling system components. Procedures for removal, inspection, repair, and installation of the coolant manifolds are contained in TM 9-281 5-202-34; procedures for repair of the cooling system are contained in TM 750-254; procedures for inspection and repair of the coolant pump are contained in TM 9-2815-202-34.
TM 9-2350-311-34-1 SECTION I. UNIVERSAL JOINTS AND COOLING FAN DRIVE ASSEMBLY 6-1 UNIVERSAL JOINTS This task covers: a. Removal b. Inspection c. Installation INITIAL SETUP Tools General mechanic’s tool kit (item 14, Appx C) Vernier calipers (item 2, Appx C) a. Removal 1 Push two sleeve joints (1 and 2) downward and remove from splined shafts (3 and 4) on fan gearboxes (5 and 6). 2 Pull two universal joints (7 and 8) away from cooling fan drive (9) and up through opening in shroud (10). b.
TM9-2350-311-34-1 c. Installation 1 Push two universal joints (7 and 8) down through openings in shroud (10) close to cooling fan drive (9). 2 Slide two sleeve joints (1 and 2) upward and install on splined shafts (3 and 4) of fan gearboxes (5 and 6).
TM 9-2350-311-34-1 6-2 COOLING FAN DRIVE ASSEMBLY This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 b. Disassembly NOTE Some cooling fan drive assemblies may not include preformed packings. 1 Remove two screws (5), gasket (6), input cover (7), and three preformed packings (8 and 9). Discard gasket and preformed packings. 2 Remove four screws (10), two bevel gearcase assemblies (11), two shims (12), and two preformed packings (13). Discard preformed packings. 3 Remove retainer (14), preformed packing (15), and seal (16). Discard preformed packing and seal.
TM 9-2350-311-34-1 6-2 COOLINF FAN DRIVE ASSEMBLY - CONTINUED b. Disassembly — Continued 7 Remove Ioclwvire (24), four screws (25), bearing cover (26), and gasket (27). Discard Iockwire and gasket. 8 Remove six screws (28), bearing housing (29), preformed packing (30), and shim pack (31). Measure thickness of shim pack and record. Discard preformed packing. 9 Remove Iockring (32) and inner bearing (33). Discard Iockring. 10 Remove driveshaft assembly (34) and outer bearing (35).
TM 9-2350-311-34-1 c. Assembly NOTE Drivegear and bevel gearshaft must be replaced as matched set. 1 Install drivegear (38), six screws (37), new Iockwidre (36), and outer bearing (35) to driveshaft (39). Toque six screws to 32 Ib-ft (43 N•m). 2 Install driveshaft assembly (34) to housing (44). 3 Install shim pack (31) using thickness recorded in disassembly and install new preformed packing (30), bearing housing (29), and six screws (28) to housing (44).
TM9-2350-311-34-1 6-2 COOLING FAN DRIVE ASSEMBLY — CONTINUED c. Assembly — Continued 8 Install sleeve (22), inner bearing (21), spacer (20), and outer bearing (19) to bevel gearshaft (23). 9 Apply lubricant to new seal (16). 10 Install new key washer (17), nut (18), seal (16), new preformed packing (15), and retainer (14). Bend key washer tabs to clear retainer wall.
TM 9-2350-311-34-1 (c) Install dial indicator on bracket and position on gear teeth (50) as shown. (d) Hold driveshaft (39) to prevent movement and rotate bevel gearshaft (23) counterclockwise as far as possible without forcing. (e) Zero dial indicator and slowly rotate gearshaft (23) clockwise reading backlash measurement. 16 Add or remove shims (para 6-4) as required to obtain 0.004- to 0.008-in. (0.10- to 0.20-mm) backlash.
TM 9-2350-311-34-1 6-2 COOLING FAN DRIVE ASSEMBLY — CONTINUED c. Assembly - Continued NOTE Repeat same procedure for bevel gearcase assembly. Some cooling fan assemblies may not include packings. 17 Install two new preformed packings (8), new gasket (6), input cover (7), new preformed packing (9), and two screws (5) to cooling fan drive assembly (3). Apply lubricant to packing (9). d. Installation 1 Install new gasket (4), cooling fan drive assembly (3). 2 lnstal l12 new Iockwasher (2) and 12 screws (1).
TM 9-2350-311-34-1 SECTION Il. RADIATOR SHROUD AND VANEAXIAL COOLING FAN ASSEMBLY 6-3 VANEAXIAL COOLING FAN ASSEMBLY AND SHROUD This task covers: a. Separation of Vaneaxial Cooling Fan Assembly from Shroud b. Separation of Vaneaxial Cooling Fans from Mount c. Assembly of Vaneaxial Cooling Fans to Mount d.
TM9-2350-311-34-1 6-3 VANEAXIAL COOLING FAN ASSEMBLY AND SHROUD — CONTINUED b. Separation of Vaneaxial Cooling Fans from Mount Remove eight screws (7), eight Iockwasher (8), eight washers (9), and two cooling fans (4) from mount (5). Discard Iockwasher. c. Assembly of Vaneaxial Cooling Fans to Mount NOTE Perform required maintenance on fan drive gearbox before assembling (para 6-4). Install two cooling fans (4), eight washers (9), eight new Iockwasher (8), and eight screws (7). d.
TM 9-2350-311-34-1 6-4 VANEAXIAL COOLING FANS AND FAN DRIVE GEARBOX This task covers: a. Disassembly b. Inspection and Test c.
TM 9-2350-311-34-1 6-4 VANEAXIAL COOLING FANS AND FAN DRIVE GEARBOX — CONTINUED a. Disassembly — Continued WARNING Oil is hazardous waste and must be disposed of in accordance with local procedures or direction of the local Hazardous Waste Management office. 3 Remove plug (7) and drain gearbox (8) oil. 4 Remove breather cap (9). 5 Remove four screws (10), retainer (11), and seal (12). Discard seal. 6 Remove four screws (13), retainer (14), and seal (15). Discard seal.
TM 9-2350-311-34-1 b. Inspection and Test 1 Check gearbox housing (17). Replace if cracked or distorted. 2 Check impeller (3). Replace if nicked, broken, or cracked. NOTE Use steps 3 thru 5 to measure gearbox backlash. 3 Secure gearbox (8) to prevent input shaft (18) from rotating. 4 Install fabricated measuring bar on output shaft (19) using washers or spacers (20) as required and install nut (1). Tighten nut using socket.
TM 9-2350-311-34-1 6-4 VANEAXIAL COOLING FANS AND FAN DRIVE GEARBOX — CONTINUED c. Assembly 1 Install new seal (12), retainer (11), and four screws (10). 2 Install new seal (15), retainer (14), and four screws (13) to gearbox (8). Toque screws to 12-15Ib-ft(16-20 N•m). 3 Install breather cap (9) and plug (7).
TM 9-2350-311-34-1 4 Replenish oil (TM 9-2350-311-20-1). 5 Install gearbox assembly (6), 10 washers (5), and 10 socket head screws (4). 6 Install impeller (3), new key washer (2), and nut (1) with bevel side down. Torque nut to 65-75 Ib-ft (88-102 N•m) using socket. Lock key washer (2) tab. 7 Install two new decals (16) as required.
TM 9-2350-311-34-1 CHAPTER 7 ELECTRICAL SYSTEM GENERAL This chapter describes and illustrates procedures for removal and installation of hull wiring harnesses and disassembly, inspection, repair, and assembly of the hull electrical components. For maintenance and repair of the alternator, refer to TM 9-2920-225-34 or TM 9-2920-258-30&P. For maintenance and repair of the battery, refer to TM 9-6140-200-14.
TM9-2350-311-34-1 SECTION I. POWERPLANT AND HULL WIRING HARNESSES 7-1 POWERPLANT AND HULL WIRING HARNESS LISTING Circuit/ Wire No.
TM 9-2350-311-34-1 159A 159B 159C 321 324 352A 352B 400 400A 400L 400-459B 401 402 402A 405 407 407L 415 415A 76B 416 438 439 439A 439B 439C 439L 450 452 452A 415B 452B 459 459A 459L 459B 486 486A 486L 500 501 502 509 509A 509B 509C 509D 509E 514 515 514 519 Personnel vent fan switch-to-motor lead Personnel vent fan switch-to-motor lead Personnel vent fan switch-to-motor lead Transmission oil pressure transmitter lead Transmission oil temperature transmitter lead Low level coolant switch-to-coolant indica
TM9-2350-311-34-1 7-1 POWERPLANT AND HULL WIRING HARNESS LISTING — CONTINUED Circuit/ Wire No. Circuit Name: 520 588 588L L1 and L2 588 Not used Circuit breaker-to-fuel pump primer switch power lead Not used Telephone circuit leads Not used 7-2 CIRCUIT IDENTIFICATION AND ILLUSTRATION OF WIRING HARNESSES (M109A2/M109A3) NOTE Electrical cables are marked with wire-numbered metal tags attached to junction of the terminal of cable.
HULL ELECTRICAL WIRING HARNESS (M109A2/M109A3) ENGINE MODEL 7083-7396 SHOWN TM 9-2350-311-34-1 7-5
TM9-2350-311-34-1 7-3 CIRCUIT IDENTIFICATION AND ILLUSTRATION OF WIRING HARNESSES (M109A4/M109A5) NOTE Electrical cables are marked with wire-numbered metal tags attached to junction of the terminal of cable. All electrical circuits shown in schematics and wiring diagrams are identified by wire numbers listed in each area.
HULL ELECTRICAL WIRING HARNESS (M109A4/M109A5) ENGINE MODEL 7083-7396 SHOWN TM 9-2350-311-34-1 7-7
TM9-2350-311-34-1 7-4 ENGINE DISCONNECT BRACKET-TO-BULKHEAD WIRING HARNESS (M109A2/M109A3) (ENGINE MODEL 7083-7396) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-9
TM 9-2350-311-34-1 7-4 ENGINE DISCONNECT BRACKET-TO-BULKHEAD WIRING HARNESS (M109A2/M109A3) (ENGINE MODEL 7083-7396) – CONTINUED a. Removal 1 Remove two screws (26), two Iockwasher (27), two nuts (28), and two connectors (29) from batteries (30). Discard Iockwasher’s. 2 Remove nut (31), Iockwasher (32), and ground wire (33) from voltage regulator mount (34). Discard Iockwasher. 3 Remove nut (35), Iockwasher (36), and lead (37) from bilge pump circuit breaker (36). Discard Iockwasher.
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Connect batteries (TM 9-2350-311-20-1) 7-11
TM 9-2350-311-34-1 7-5 ENGINE DISCONNECT BRACKET-TO-BULKHEAD WIRING HARNESS (M109A2/M109A3) (ENGINE MODEL 7083-7391) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-13
TM 9-2350-311-34-1 7-5 ENGINE DISCONNECT BRACKET-TO-BULKHEAD WIRING HARNESS (M109A2/M109A3) (ENGINE MODEL 7083-7391) – CONTINUED a. Removal 1 Remove two screws (26), two Iockwasher (27), two nuts (28), and two connectors (29) from batteries (30). Discard Iockwasher. 2 Remove nut (31), Iockwasher (32), and ground wire (33) from voltage regulator mount (34). Discard Iockwasher. 3 Remove nut (35), Iockwasher (36), and lead (37) from bilge pump circuit breaker (38). Discard Iockwasher.
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Connect batteries (TM 9-2350-311-20-1) 7-15
TM 9-2350-311-34-1 7-6 DRIVER’S BULKHEAD-TO-MASTER RELAY WIRING HARNESS (M109A4/M109A5) (ENGINE MODEL 7083-7396) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-17
TM 92350-311 -34-1 7-6 DRIVER’S BULKHEAD-TO-MASTER RELAY WIRING HARNESS (M109A4/M109A5) (ENGINE MODEL 7083-7396) – CONTINUED a. Removal 1 Remove two screws (28), two Iockwashers (29), two nuts (30), and two connectors (26) from batteries (31). Discard lockwashers. 2 Remove screw (32), washer (33), Iockwasher (34), nut (35), and strap (36). Discard Iockwasher. 3 Remove screw (37), Iockwasher (38), washer (39), and two ground wires (18 and 22) from voltage regulator mount (40). Discard Iockwasher.
TM 9-2350-311-34-1 7 Install two connectors (26), two nuts (30), two new Iockwashers (29), and two screws (28) to batteries (31).
TM 9-2350-311-34-1 7-7 DRIVER’S BULKHEAD-TO-MASTER RELAY WIRING HARNESS (M109A4/M109A5) (ENGINE MODEL 7083-7391) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-21
TM 9-2350-311-34-1 7-7 DRIVER’S BULKHEAD-TO-MASTER RELAY WIRING HARNESS (M109A4/M1O9A5) (ENGINE MODEL 7083-7391) – CONTINUED a. Removal 1 Remove two screws (28), two Iockwashers (29), two nuts (30), and two connectors (26) from batteries (31). Discard Iockwashers. 2 Remove screw (32), washer (33), Iockwasher (34), nut (35), and strap (36). Discard Iockwasher. 3 Remove screw (37), lockwasher (38), washer (39), and two ground wires (18 and 22) from voltage regulator mount (40). Discard Iockwasher.
TM 9-2350-311-34-1 7 Install two connectors (26), two nuts (30), two new Iockwashers (29), and two screws (28) to batteries (31).
TM 9-2350-311-34-1 7-8 BULKHEAD-TO-HEADLIGHTS/BILGE PUMP WIRING HARNESS This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-25
TM 9-2350-311-34-1 7-8 BULKHEAD-TO-HEADLIGHT/BBILGE PUMP WIRING HARNESS — CONTINUED a. Removal 1 Remove two screws (23), two washers (24), two ground leads (5), and two snap-in connectors (6 and 7) from fuel level transmitters. NOTE Powerplant must be removed to disconnect fuel pump leads (TM 9-2350-311-20-1). 2 Remove four snap-in connectors (1 thru 4) from fuel pump. 3 Disconnect 11 quick disconnects (8, 9, 10, 11, 12, and 19) from left and right headlight assemblies.
TM 9-2350-311-34-1 7 Install four snap-in connectors (1 thru 4) to electric fuel pumps. NOTE Powerplant must be removed to connect fuel pump leads (TM 9-2350-311-20-1). 8 Install two snap-in connectors (6 and 7), two guard leads (5), two washers (24), and two screws (23) to fuel level transmitters.
TM 9-2350-311-34-1 7-9 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7396) Thiss task covers: a. Removal b. Disassembly c. Assembly d. Installation Tools Equipment Conditions General mechanic’s tool kit (item 14, Appx C) Batteries disconnected (TM 9-2350-311-20-1) Portable instrument panel removed (TM 9-2350-311-20-1) Materials/Parts Electrical tape — black (item 25, Appx B) References TM 9-2350-311-20-1 Connector No.
TM 9-2350-311-34-1 7-29
TM 9-2350-311-34-1 7-9 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7398) – CONTINUED a. Removal 1 Remove screw (30), nut (31), screw (32), and washer (33) to release plastic strap (34) and ground wire (14). 2 Disconnect two connectors (28 and 29).
TM 9-2350-311-34-1 4 Disconnect connector (11), connector ground (14), and connector (8) at master warning light (37) near driver’s steering column (38). 5 Disconnect two connectors (15 and 16) from parking brake warning switch (39) at brake assembly (40). 6 Disconnect two connectors (18) (two wires 14) at neutral safety switch (41).
TM 9-2350-311-34-1 7-9 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7396) – CONTINUED a. Removal — Continued 7 Disconnect connector (11) at circuit breaker (42). NOTE Connector 18 is a branch of the diode wiring harness assembly on M109A4/M109A5 Howitzers. 8 Disconnect connector (12) from driver's instrument panel wiring harness (43). 9 Disconnect three connectors (10, 15, and 18) at driver’s instrument panel (36).
TM 9-2350-311-34-1 10 Disconnect connector (9) from “Y” connector (44) and disconnect connector (21 ) from accessory control boxto-heater/blower wiring harness (45). 11 Disconnect connector (17) from in-tank fuel pump lead assembly and disconnect connector (20) from 'Y“ connector-to-in-tank fuel pump lead assembly. 12 Disconnect two connectors (19 and 22) from flame heater electrical lead (46). b. Disassembly 1 Remove electrical tape only for sections being disassembled.
TM 9-2350-311-34-1 7-9 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7396) – CONTINUED d. Installation 7-34 1 Connect two connectors (19 and 22) at flame heater electrical lead (46). 2 Connect connector (17) at in-tank fuel pump lead assembly and connect connector (20) to “Y” connector-to-intank fuel pump lead assembly. 3 Connect connector (9) to “Y” connector (44) and connect connector (21) to accessory control box-to-heater/ blower wiring harness (45).
TM 9-2350-311-34-1 7-35
TM 9-2350-311-34-1 7-9 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7398) – CONTINUED d. Installation — Continued NOTE Connector 18 is a branch of the diode wiring harness assembly on M109A4/M109A5 Howitzers. 7 Connect three connectors (10, 15, and 18) to driver’s instrument panel (36). Connector (18) will be connected to diode assembly on M109A4/M109A5 Howitzers. 8 Connect connector (12) to driver’s instrument panel wiring harness (43).
TM 9-2350-311-34-1 10 Connect two connectors (18) (two wires 14) to neutral safety switch (41). 11 Connect connectors (28 and 29). 12 Install ground wire (14), plastic strap (34), nut (31), screw (30), washer (33), and screw (32).
TM 9-2350-311-34-1 7-10 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7391) This task covers: a. Removal b. Disassembly c. Assembly d. Installation INITIAL SETUP Equipment Conditions Tools Batteries disconnected (TM 9-2350-311-20-1) General mechanic’s tool kit (item 14, Appx C) Portable instrument panel removed (TM 9-2350-311-20-1) Materials/Parts Electrical tape — black (item 25, Appx B) References TM 9-2350-311-20-1 Connector No.
TM 9-2350-311-34-1 7-39
TM 9-2350-311-34-1 7-10 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7391) – CONTINUED a. Removal 1 Remove screw (30), washer (31), screw (32), and washer (33) to release plastic strap (34) and ground wire (14). 2 Disconnect two connectors (28 and 29).
TM 9-2350-311-34-1 7-41
TM 9-2350-311-34-1 7-10 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7391) – CONTINUED a. Removal—Continued 6 Disconnect two connectors (18) (two wires 14) at neutral safety switch (41). 7 Disconnect connector (11) at circuit breaker (42). 8 Disconnect connector (12) from driver’s instrument panel wiring harness (43). NOTE Connector 18 is a branch of the diode wiring harness assembly on M109A4/M109A5 Howitzers.
TM 9-2350-311-34-1 7-43
TM 9-2350-311-34-1 7-10 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7391) – CONTINUED d. Installation 1 Connect connector (17) to in-tank fuel pump lead assembly and connect connector (20) to “Y” connector at intank fuel pump lead assembly. 2 Connect connector (9) to “Y” connector (45) and connect connector (21) to accessory control box-to-heater/ blower wiring harness (46). 3 Connect two connectors (15 and 16) to parking brake warning switch (39) at brake assembly (40).
TM 9-2350-311-34-1 4 Connect connector (11), connector ground (14), and connector (8) to master warning light (37) near driver’s steering column (38). 5 Connect connector (13) at bulkhead-to-driver’s instrument panel wiring harness, connector (15) at parking brake light, and connector (16) to wiring harness between circuit breakers (35) and driver's instrument panel (36).
TM 9-2350-311-34-1 7-10 BULKHEAD-TO-PORTABLE INSTRUMENT PANEL WIRING HARNESS (ENGINE MODEL 7083-7391) – CONTINUED d. Installation — Continued NOTE Connector 18 is a branch of the diode wiring harness assembly on M109A4/M109A5 Howitzers. 6 Connect four connectors (10, 15, 18, and 19) to driver’s instrument panel. Connector (18) will be connected to diode wiring harness assembly on M109A4/M109A5 Howitzers. 7 Connect connector (22) to lead (44).
TM 9-2350-311-34-1 10 Connect four connectors (18) (two wires 14, one wire 415A, and one wire 415B). 11 Connect connectors (28 and 29). 12 Install ground wire (14), plastic strap (34), nut (31), screw (30), washer (33), and screw (32).
TM 9-2350-311-34-1 7-11 BULKHEAD-TO-DRIVER’S INSTRUMENT PANEL WIRING HARNESS This task covers: a. Removal b. Disassembly c. Assembly d. Installation INITIAL SETUP References Tools TM 9-2350-311-20-1 General mechanic’s tool kit (item 14, Appx C) Equipment Conditions Materials/Parts Batteries disconnected (TM 9-2350-311-20-1) Portable instrument panel removed (TM 9-2350-311-20-1) Electrical tape — black (item 25, Appx B) Lockwashers (2) (item 37, Appx F) Connector No.
TM 9-2350-311-34-1 7-49
TM 9-2350-311-34-1 7-11 BULKHEAD-TO-DRIVER’S INSTRUMENT PANEL WIRING HARNESS — CONTINUED a Removal 1 Disconnect two connectors (12 and 28) from brake pedal assembly (31). 2 Disconnect connector (27) from bulkhead (32). 3 Disconnect connector (26), strap (33), nut (34), and washer (35) from driver's dome light (36). NOTE Connectors are located in well below driver's instrument panel and circuit breakers. 4 Disconnect connector (6). 5 Disconnect connector (14). 6 Disconnect connector (15).
TM 9-2350-311-34-1 7-51
TM 9-2350-311-34-1 7-11 BULKHEAD-TO-DRIVER’S INSTRUMENT PANEL WIRING HARNESS — CONTINUED a. Removal — Continued 7 Disconnect connector (11) from fuel pump primer switch (37). 8 Disconnect connector (23) from circuit breaker (38).
TM 9-2350-311-34-1 NOTE For quick guide to wire connector locations see paragraphs 7-2 and 7-3. 9 Disconnect seven connectors (29 8, 9, 10, 5,20, and 24) from driver's instrument panel. NOTE Screws are located inside of hull on rear bulkhead. 10 Remove two screws (40), two flat washers (41), and two Iockwashers (42) from left and right assemblies (43 and 44). Discard lockwashers. 11 Pull taillight assemblies (43 and 44) away from hull to expose connectors.
TM 9-2350-311-34-1 7-11 BULKHEAD-TO-DRIVER’S INSTRUMENT PANEL WIRING HARNESS — CONTINUED a. Removal — Continued 14 Remove plastic strap (45), screw (46), and washer (47) to release wiring harness. 15 Remove 16 plastic straps (48), 16 screws (49), and 16 washers (50) (11 from left bulkhead and 5 from rear bulkhead). b. Disassembly 1 Remove electrical tape only for sections being disassembled. 2 Separate/isolate wiring harness. 3 Disassemble wiring harness (TM 9-2350-311-20-1). c.
TM 9-2350-311-34-1 7-55
TM 9-2350-311-34-1 7-11 BULKHEAD-TO-DRIVER’S INSTRUMENT PANEL WIRING HARNESS — CONTINUED d. Installation- Continued NOTE Install screws from inside hull on rear bulkhead. 5 Position left and right taillight assemblies (43 and 44) on hull and install two screws (40), two flat washers (41), and two new Iookwashers (42). NOTE For quick guide to wire connector locations see paragraphs 7-2 and 7-3. 6 Connect seven connectors (29,8,9, 10,15,20, and 24) to driver’s instrument panel (39).
TM 9-2350-311-34-1 7-57
TM 9-2350-311-34-1 7-11 BULKHEAD-TO-DRIVER’S INSTRUMENT PANEL WIRING HARNESS — CONTINUED d. Installation — Continued 8 Connect connector (11) to fuel pump primer switch (37). 9 Connect connector (15). 10 Connect connector (14). 11 Connect connector (6). 12 Connect connector (26) and install plastic strap (33), nut (34), and washer (35) to driver's dome light (36). 13 Connect connector (27) to bulkhead (32). 14 Connect two connectors (12 and 28) to brake pedal assembly (31).
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install portable instrument panel (TM 9-2350-311-20-1) Connect batteries (TM 9-2350-311-20-1) 7-59
TM 9-2350-311-34-1 7-12 POWER LEAD WIRING HARNESS (M109A2) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-61
TM 9-2350-311-34-1 7-12 POWER LEAD WIRING HARNESS (M109A2) — CONTINUED a. Removal - Continued 3 Disconnect connector (2) from accessory control box (14). 4 Remove screw (15), washer (16), and nut (17) from slip ring segment board (18) and release lead (3).
TM 9-2350-311-34-1 NOTE Wiring harness maybe removed from hull with slave start receptacle attached or leads can be pulled out of receptacle with sockets as required. If wiring harness removed is without receptacle, skip steps 5 and 6. 5 Remove slave start receptacle (19) as follows: (a) Remove four screws (20), four Iockwashers (21), and gasket (22) from battery compartment bulkhead. Discard Iockwashers and gasket. (b) Push slave start receptacle (19) with mounting plate (23) into driver’s compartment.
TM 9-2350-311-34-1 7-12 POWER LEAD WIRING HARNESS (M109A2) — CONTINUED a. Removal — Continued 7 Disconnect connector (1) at driver’s compartment bulkhead. 8 Remove two plastic straps (26), four screws (27), and four washers (28) to release wiring harness. 9 Remove 11 plastic straps (29), 11 screws (30), and 11 washers (31). b. Disassembly Disassemble wiring harness leads (TM 9-2350-311-20-1). c. Assembly Assemble wiring harness leads (TM 9-2350-31 1-20-1). d.
TM 9-2350-311-34-1 7-65
TM 9-2350-311-34-1 7-12 POWER LEAD WIRING HARNESS (MI09A2) CONTINUED d. Installation — Continued 6 Secure lead (3) by Installing washer (16), screw (15), and nut (17) to slip ring segment board (18). 7 Connect connector (2) to accessory control box (14). 8 Connect connector (4) to wire 15 lead.
TM 9-2350-311-34-1 9 Connect six connectors (5 thru 10) to circuit breakers (13). NOTE FOLLOW-ON MAINTENANCE: Install driver’s instrument panel (TM 9-2350-311-20-1) Connect batteries (TM 9-2350-311-20-1) 7-13 POWER LEAD (M109A2/M109A3) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 7-13 POWER LEAD (M109A2/M109A3) — CONTINUED NOTE Vehicles with engine model 7083-7396 use connector 5 for flame heater system. Vehicles with engine model 7083-7391 use connector 5 for glow plug controller system. Connector No.
TM 9-2350-311-34-1 a. Removal 1 Disconnect five connectors (5 thru 9) from circuit breakers (11). 2 Disconnect connector (4) at wire 15 lead. 3 Disconnect connector (2) at accessory control box (12). 4 Remove screw (13), washer (14), and nut (15) from slip ring segment board (16) and release lead (3).
TM 92350-311 -34-1 7-13 POWER LEAD (M109A2/M109A3) — CONTINUED a. Removal — Continued 5 Disconnect connector (1) from driver's compartment bulkhead. 6 Remove two plastic straps (17), four screws (18), and four washers (19) to release power lead. 7 Remove 11 plastic straps (20), 11 screws (21), and 11 washers (22). 8 Remove screw (23), washer (24), and lead (10) and remove wiring harness. 9 Remove two screws (25), two washers (26), and ground lead (27).
TM 9-2350-311-34-1 b. Disassembly Disassemble wiring harness leads (TM 9-2350-311-20-1). c. Assembly Assemble wiring harness leads (TM 9-2350-311-20-1). d. installation 1 Install ground lead (27), two washers (26), and two screws (25). 2 Install wiring harness, lead (10), washer (24), and screw (23). 3 Install 11 plastic straps (20), 11 screws (21), and 11 washers (22). 4 Install two plastic straps (17), four washers (1 9), and four screws (18) to secure power lead.
TM 9-2350-311-34-1 7-13 POWER LEAD (M109A2?M109A3) — CONTINUED d. Installation — Continued 8 Connect connector (4) at wire 15 lead. 9 Connect five connectors (5 thru 9) to circuit breakers (11). NOTE FOLLOW-ON MAINTENANCE: Install driver's instrument panel (TM 9-2350-311-20-1) Connect batteries (TM 9-2350-311-20-1) 7-14 POWER LEAD (M109A4/M109A5) This task covers: a. Removal b. Disassembly c. Assembly d.
TM 9-2350-311-34-1 NOTE Vehicles with engine model 7083-7396 use connector 8 for flame heater system. Vehicles with engine model 7083-7391 use connector 8 for glow plug controller system. Connector No. Electrical Lead To: Wire No. Connector No.
TM 9-2350-311-34-1 7-14 POWER LEAD (M109A4/M109A5) — CONTINUED a. Removal 1 Disconnect six connectors (5, 6, and 8 thru 11) from circuit breakers (1 2). 2 Disconnect connector (4) at wire 15 lead. 3 Disconnect connector (7) at "Y" connector.
TM 9-2350-311-34-1 4 Disconnect connector (2) at accessory control box (13). 5 Remove screw (14), washer (15), and nut (16) from slip ring segment board (17) and release lead (3). 6 Disconnect connector (1) at driver’s compartment bulkhead. 7 Remove two plastic straps (18), four screws (19), four Iockwashers (20), and four washers (21). Release power lead and reinstall straps, washers, Iockwashers, and screws. Discard Iockwashers.
TM 9-2350-311-34-1 7-14 POWER LEAD (M109A4/M109A5) — CONTINUED d. Installation 1 Install wiring harness to hull. 2 Secure power lead and install 13 plastic straps (22), 13 washers (25), 13 new Iockwashers (24), and 13 screws (23). 3 Secure power lead and install two plastic straps (18), four washers (21), four new Iockwashers (20), and four screws (19). 4 Connect connector (1) at driver’s compartment bulkhead.
TM 9-2350-311-34-1 7 Connect connector (7) at “Y” connector. 8 Connect connector (4) at wire 15 lead. 9 Connect six connectors (5, 6, and 8 thru 11) to circuit breakers (12).
TM 9-2350-311-34-1 SECTION Il. HULL ELECTRICAL COMPONENTS 7-15 RECTIFIER (M109A2/M109A3) This task covers: a. Disassembly M109A2/M109A3 Tools General mechanic’s tool kit (item 14, Appx C) Multimeter (item 16, Appx C) Soldering gun (item 11, Appx C) Acetone solvent (item 1, Appx B) Electrical tape — black (item 25, Appx B) Gaskets (2) (item 44, Appx F) b. Inspection and repair c.
TM 9-2350-311-34-1 7-79
TM 9-2350-311-34-1 7-15 RECTIFIER (MI 09A2/M109A3) — CONTINUED a. Disassembly NOTE Perform electrical tests and disassemble defective components only. 1 Remove six screws (21), six flat washers (22), cover (23), and preformed packing (24). Discard preformed packing. 2 Remove screw (26) and heat sink terminal (13). 3 Remove nut (27) and bushing (28). 4 Remove screw (29), Iockwasher (30), flat washer (31), and lead C-6 and C-7 to E-3 (32) from heat sink (14). Discard Iockwasher.
TM 9-2350-311-34-1 5 Unsolder six electrical leads (33) from six power diode assembly terminals (34 and 35) (TB SIG 222). 6 Unsolder electrical lead C-5 to CR-6 (36) at power diode assembly (37) (TB SIG 222). 7 Unsolder electrical lead C-3 to CR-5 (38) at power diode assembly (39) (TB SIG 222). 8 Unsolder electrical lead C-1 to CR-4 (40) at power diode assembly (41) (TB SIG 222).
TM 9-2350-311-34-1 7-15 RECTIFIER (M109A2/M109A3) — CONTINUED a. Disassembly — Continued NOTE There are two power diodes per power diode assembly CR-1 thru CR-6. 10 Remove three terminals (34) and three insulators (47) from three power diodes assemblies (4, 5, and 6). Unsolder at diode poles to remove terminals (TB SIG 222). 11 Remove three terminals (35) and three insulators (46) from three power diode assemblies (1, 2, and 3). Unsolder at diode poles to remove terminals (TB SIG 222).
TM 9-2350-311-34-1 16 Remove eight screws (54), connector J-2 (20), connector J-1 (19), and two gaskets (55). Discard gaskets. NOTE Capacitor board is held to housing with adhesive. Capacitor board and six capacitors are issued as an assembly. 17 Remove capacitor board (56) and six capacitors (57) from housing (58). NOTE Capacitor board is held to housing with adhesive. Capacitor board and capacitor C-7 are issued as an assembly. 18 Remove capacitor board (59) with capacitor C-7 (15).
TM 9-2350-311-34-1 7-15 RECTIFIER (MI 09A2/M109A3) — CONTINUED b. Inspection and Repair 1 Inspect cover (23). Replace if cracked or distorted. Replace decal if missing or damaged. 2 Inspect heat sink (14). Replace if cracked or distorted. 3 Inspect three insulators (51). Replace if cracked or distorted. 4 Inspect six pins (52). Replace if burred or broken. 5 Inspect housing (56). Replace if cracked or distorted. 6 Inspect six terminals (34 and 35). Replace if cracked or broken.
TM 94350-311-34-1 8 Inspect two connectors (19 and 20). Replace if pins are broken. Solder leads if loose (TB SIG 222). 9 Inspect two capacitor boards (56 and 59). Replace if boards are cracked or broken. Check for loose or missing terminals. Replace as required. 10 Test six capacitors (7 thru 12) for 0.01 MF ± 10%. Replace capacitor assembly if defective. 11 Test capacitor C-7 (15) for 3.0 MF ± 10%. Replace capacitor assembly if defective.
TM 9-2350-311-34-1 7-15 RECTIFIER (M109A2/M109A3) — CONTINUED C. Assembly 1 Install two new gaskets (55), two connectors (19 and 20), and eight screws (54) to housing (58). 2 Solder two electrical leads (53) (wire 1 on pin B and wire 3 on pin E) to connector J-2 (20) (TB SIG 222). 3 Install six pins (52), three insulators (51), and heat sink (14) to housing (58). Apply coating of silicone compound to mating surfaces of diodes.
TM 9-2350-311-34-1 7-87
TM 9-2350-311-34-1 7-15 RECTIFIER (M109A2/M109A3) — CONTINUED c. Assembly — Continued 8 Solder electrical leads to connection points except capacitor board assemblies (50 and 53). Acetone solvent is toxic and flammable. Use only in well-ventilated area. Do not breathe vapors. Do not use near open flame or excessive heat. Failure to heed warning could cause serious injury or death.
TM 9-2350-311-34-1 11 Apply sealing compound to six screws (21) and six flat washers (22). Install new preformed packing (24), cover (23), six screws, and six flat washers. 7-16 RECTIFIER (M109A4/M109A5) This task covers: a. Removal b. Inspection and Repair c.
TM 9-2350-311-34-1 7-16 RECTIFIER (MI 09A4/M109A5) — CONTINUED LEGEND 1 Diode assembly CR-1 and CR-4 2 Diode assembly CR-2 and CR-5 3 Diode assembly CR-3 and CR-6 4 Capacitor C-1 5 Capacitor C-2 6 Capacitor C-3 7 Capacitor C-4 8 Capacitor C-5 9 10 11 12 13 14 15 Capacitor C-6 Capacitor C-7 Positive heat sink terminal Negative bus bar Positive bus bar Connector J-1 Connector J-2 NOTE Point of symbol indicates direction of conventional current flow. Diode assemblies consist of two diodes. a.
TM 9-2350-311-34-1 7-91
TM 9-2350-311-34-1 7-16 RECTIFIER (M109A4/M109A5) — CONTINUED a. Disassembly — Continued NOTE When removing more than one wire from receptacle, tag wires for future identification. 3 Remove four screws (25), gasket (26), and connector J2 (15). Discard gasket. 4 Disconnect two wire leads 4 and 5 (27) from connector J2 (15). 5 Remove three screws (28), three washers (29), three Iockwashers (30), and six leads (31). Discard Iockwashers. 6 Remove four screws (32), gasket (33), and connector J1 (14).
TM 9-2350-311-34-1 8 Remove nut (36) and Iockwasher (37) from ground terminal (38) and disconnect two wire leads (39). Discard Iockwasher. 9 Remove three screws (40), three washers (41), three Iockwashers (42), and negative bus bar (12). Discard Iockwashers. 10 Remove two washers (43), two Iockwashers (44), two nuts (45), and ground terminal (38). 11 Remove three screws (46), three washers (47), three Iockwashers (48), and positive bus bar (13). Discard Iockwashers.
TM 9-2350-311-34-1 7-16 RECTIFIER (M109A4/M109A5) — CONTINUED a. Disassembly — Continued 13 Remove six screws (53), six Iockwashers (54), and three diode assemblies (1, 2, and 3). Discard Iockwashers. NOTE Capacitor boards are secured to housing with pressure-sensitive tape. Remove only if necessary. 14 Remove capacitor board (55) from housing (56). 15 Unsolder three electrical leads (57) from capacitor board (55) (TB SIG 222). 16 Unsolder lead (58) from capacitor board (59) (TB SIG 222).
TM 9-2350-311-34-1 b. Inspection and Repair 1 Inspect cover (18). Replace if cracked or distorted. 2 Inspect housing (56). Replace if cracked or distorted. 3 Test three diode assemblies (1, 2, and 3) for continuity (para 3-3). Replace if defective. 4 Inspect two connectors (14 and 15). Replace if pins are broken. Resolder leads if loose (TB SIG 222). 5 Inspect capacitor boards (55 and 59). Replace if boards are cracked or broken. Check for loose or missing terminals. Replace as required.
TM 9-2350-311-34-1 7-16 RECTIFIER (M109A4/M109A5) — CONTINUED c.
TM 9-2350-311-34-1 1 Assemble electrical leads as required (TM 9-2350-311-20-1). NOTE Refer to electrical wiring diagram for installation of leads. 2 Solder lead (56) to capacitor board (59) (TB SIG 222). 3 Solder three leads (57) to capacitor board (55) (TB SIG 222). Acetone solvent is toxic and flammable. Use only in well-ventilated area. Do not breathe vapors. Do not use near open flame or excesive heat. Failure to heed warning could cause serious injury or even death.
TM 9-2360-311-34-1 7-16 RECTIFIER (M109A4/M109A5) — CONTINUED c. Assembly — Continued 8 Apply coating of silicone compound to mating surfaces and install three diode assemblies (1, 2, and 3), six new Iookwashers (54), and six screws (53). Torque screws to 20-23 lb-in. (2.3-2.6 N-m) 9 Install two nuts (45), two new lockwashers (44), and two washers (43) to ground terminal (38). 10 Install ground terminal (38) and secure by tightening bottom nut (45). Do not tighten top nut (45).
TM 9-2350-311-34-1 18 Install connector J2 (15), new gasket (26), and four screws (25). 19 Bend terminals of three leads 1, 2, and 3 (31 ) to 90°. 20 Install six leads (31), three screws (28), three flat washers (29), and three new lockwashers (30).
TM 9-2350-311-34-1 7-16 RECTIFIER (M109A4/M109A5) — CONTINUED c. Assembly — Continued 21 Connect two wire leads (23) to two connectors (14 and 15). 22 Install flat washer (22), five leads (23), flat washer (22), new Iockwasher (21 ), and nut (20) to screw (60). 23 Install new preformed packing (19), cover (18), eight flat washers (17), and eight screws (16).
TM 9-2350-311-34-1 CHAPTER 8 FINAL DRIVE AND TRACK SUSPENSION GENERAL This chapter describes and illustrates procedures for disassembly and assembly of the final drive assembly and the track suspension. PAGE Section I 8-1 Section II 8-2 FINAL DRIVE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...0-2 FINAL DRIVE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 SECTION I. FINAL DRIVE ASSEMBLY 8-1 FINAL DRIVE ASSEMBLY This task covers: a. Disassembly b.
TM 9-2350-311-34-1 8-3
TM 9-2350-311-34-1 8-1 FINAL DRIVE ASSEMBLY — CONTINUED a. Disassembly — Continued 9 Remove eight screws (23), eight Iockwashers (24), output shaft (25), and gasket (26). Discard Iockwashers and gasket. 10 Remove bearing (27), gasket (28), cap (29), and seal (30). Discard gasket and seal. 11 Remove two plugs (31). b. Assembly 8-4 1 Install two plugs (31). 2 Apply coat of grease to mating surface of new seal (30). 3 Install seal (30), cap (29), new gasket (28), and bearing (27).
TM 9-2350-311-34-1 10 Install bearing (17) to ring gear (15). 11 Install spacer (16) and ring gear (15) to output shaft (25). 12 Place final drive housing (22) in fabricated stand. 13 Install nut (14) and torque nut to 425-475 lb-ft (576-644 N-m) to ensure seating of parts. If slot in nut is alined with cotter pin hole, install new cotter pin (13). Tighten nut (30° maximum), until slot alines with hole. 14 Install cotter pin (13) with head inserted in nut (14) slot.
TM 9-2350-311-34-1 SECTION Il. TRACK SUSPENSION 8-2 ROAD WHEEL ARM ASSEMBLY — UPPER SPINDLE This task covers: a. Disassembly General mechanic’s tool kit (item 14, Appx C) Prong wrench (item 25, Appx C) Torque wrench (item 26, Appx C) b. Assembly Seal (item 61, Appx F) Seal (item 71, Appx F) TM 9-2350-311-20-1 Grease (item 9, Appx B) Key washer (item 8, Appx F) Preformed packing (item 21, Appx F) . t Conditions Road wheel arm assembly removed (TM 9-2350-311-20-1) a.
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install road wheel arm assembly (TM 9-2350-311-20-1) 8-7/(8-8 blank)
TM 9-2350-311-34-1 CHAPTER 9 HULL-RELATED COMPONENTS chapter describes and illustrates procedures for disassembly, repair, and assembly of the personnel airduct ventilating fan and the bilge pump. It also describes and illustrates the removal and installation of the data plates. For disassembly, repair, and assembly of the personnel heater, refer to TM 9-2350-205-24&P. CONTENTS PERSONNEL AIRDUCT VENTILATING FAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
TM 9-2350-311-34-1 9-1 PERSONNEL AIRDUCT VENTILATING FAN This task covers: a. Disassembly General mechanic’s tool kit (item 14, Appx C) Growler (item 10, Appx C) Multimeter (item 16, Appx C) Grommet (item 43, Appx F) Lockrings (2) (item 3, Appx F) Lockwire (2) (item 87, Appx F) Lockwashers (2) (item 29, Appx F) Lockwashers (4) (item 30, Appx F) b. Inspection and Repair c. Assembly Two References TM 9-214 Personnel ventilating airduct fan removed (TM 9-2350311-20-1) Impeller blocked a.
TM 9-2350-311-34-1 3 Remove four nuts (9), four Iockwashers (10), and four electrical leads (11 ) from noise filter terminals (1 2). Discard Iockwashers. 4 Remove Iockwire (13), four screws (14), four flat washers (15), ground wire (16), and noise filter (8). Discard Iockwire. 5 Remove Iockwire (17), four screws (18), and four flat washers (19) at front of housing (20). Discard Iockwire. 6 Remove grommet (21). Discard grommet.
TM 9-2350-311-34-1 9-1 PERSONNEL AIRDUCT VENTILATING FAN — CONTINUED a. Disassembly — Continued 10 Remove armature (28) from motor field and frame assembly (29). 11 Remove two flat washers (30), bearing (31), flat washer (32), and Iockring (33). Discard Iockring. 12 Remove bearing (34), spacer (35), flat washer (36), and Iockring (37) from armature (28). Discard Iockring. 13 Remove spring tension washer (38) and flat washer (39) from armature (28). b. Inspection and Repair 1 Inspect impeller (3).
TM 9-2350-311-34-1 9-5
TM 9-2350-311-34-1 9-1 PERSONNEL AIRDUCT VENTILATING FAN — CONTINUED C. Assembly — Continued 5 Install two electrical brushes (25) and two screws (24). 6 Install end cover (27) and two screws (26). 7 Feed electrical leads (11) through grommet hole (22) and install motor assembly (23). Install new grommet (21). 8 Install four flat washers (19), four screws (18), and new Iockwire (17) to front of housing (20).
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install personnel ventilating airduct fan (TM 9-2350-311-20-1) 9-7
TM 9-2350-311-34-1 9-2 BILGE PUMP This task covers: a. Disassembly b. Inspection, Repair, and Test c.
TM 9-2350-311-34-1 9-9
TM 9-2350-311-34-1 9-2 BILGE PUMP — CONTINUED a. Disassembly — Continued 9 Remove Iockwire (27), four screws (28), retainer plate (29), and snap ring (30). Discard Iockwire and snap ring. 10 Remove bearing (31), retainer (32), and drive end bell (33) from rotor (34). Use tape or grease pencil to identify bearing. 11 Remove commutator end bearing (35). Use tape or grease pencil to identify bearing. 12 Remove yoke (36) and gasket (37) from commutator end bell assembly (38). Discard gasket.
TM 9-2350-311-34-1 14 Unsolder electrical lead (45) from field coils (46) to connector (TB SIG 222). 15 Remove screw (47), Iockwasher (48), and field coils (46) from commutator end bell (49). Discard Iockwasher. 16 Remove two screws (50), two Iockwashers (51), and jumper wire (52). Discard Iockwashers. b. Inspection, Repair, and Test Compressed air used for cleaning purposes must not exceed 30 psi (207 kPa).
TM 9-2350-311-34-1 9-2 BILGE PUMP — CONTINUED b. Inspection, Repair, and Test-Continued 5 Inspect key (14). Replace if damaged or broken. 6 Inspect seal cover (22). Replace if cover is cracked or if mating surfaces are warped. 7 Inspect four fiberglass sleeves (24). Replace if chipped or broken. 8 Inspect two bearings (31 and 35) (TM 9-214). Replace if defective. 9 Inspect drive end bell (33). Replace if cracked or defective or if mating surfaces are warped. 10 Test rotor (34) on growler.
TM 9-2350-311-34-1 c. Assembly 1 Install jumper wire (52), two new Iockwashers (51 ), and two screws (50). 2 Install field coils (46), new Iockwasher (46), and screw (47) to commutator end bell (50). 3 Solder electrical lead (45) from field coils (46) to connector (TB SIG 222). 4 Install insulator sleeve (44), connector adapter (43), and two new gaskets (42). Install connector (41), four new Iockwashers (40), and four screws (39).
TM 9-2350-311-34-1 9-2 BILGE PUMP — CONTINUED c. Assembly — Continued NOTE Ensure bearings are installed at location as shown. Do not reverse installation of bearings. 6 Install commutator end bearing (35) to rotor (34). Check label to correctly identify bearing. 7 Install drive end bell (33), retainer (32), and bearing (31) to rotor (34). Check label to correctly identify bearing. 8 Install new snap ring (30), retainer plate (29), four screws (28), and new Iockwire (27).
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install bilge pump (TM 9-2350-311-20-1) 9-15
TM 9-2350-311-34-1 9-3 DATA PLATES This task covers: a. Removal b. Installation Tools General mechanic’s tool kit (item 14, Appx C) a. Removal NOTE Vehicle data plates differ only with information shown on plate. 1 Remove four screws (1). 2 Remove data plate (2). b. Installation NOTE Vehicle data plates differ only with information shown on plate. 1 Install data plate (2). 2 Install four screws (1).
TM 9-2350-311-34-1 CHAPTER 10 ENGINE AND BATTERY WINTERIZATION KIT GENERAL This chapter describes and illustrates procedures for installation of the winterization kit into the vehicle and disassembly and assembly of specific winterization kit components. CONTENTS Section I 10-1 Section II 10-2 10-3 PAGE WINTERIZATION KIT INSTALLATION.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...10-2 WINTERIZATION KIT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 SECTION I. WINTERIZATION KIT INSTALLATION 10-1 WINTERIZATION KIT INSTALLATION This task covers: a. Installation b.
TM 9-2350-311-34-1 LEGEND 1 2 3 4 5 6 7 8 Rear battery winterization box Front battery winterization box Heater exhaust outlet Coolant outlet hose Coolant heater assembly Electric fuel pump Fuel filter Heater coolant pump 9 Engine coolant right manifold 10 Primary fuel filter-to-coolant heater fuel filter hose 11 Primary fuel filter 12 Main fuel supply hose 13 Winterization kit control box 14 Coolant heater harness 15 Coolant inlet hose a.
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued NOTE Ensure bottom insulation cut-outs are alined with battery tray mounting blocks. 4 Fold up rear battery winterization box (6). Insert through front battery access opening (5) and locate box in rear battery access opening (4). NOTE • Ensure box bottom cut-outs are alined with battery tray mounting blocks. • Screw and Iockwasher were removed in step 1.
TM 9-2350-311-34-1 10-5
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a Installation — Continued 10 Place four batteries on two battery trays with battery terminals positioned as shown below. Secure batteries using mounting components (TM 9-2350-311-20-1). 11 Open transmission left and right access doors and air-intake grille. Install four shock mounts (19) and two coolant heater mounting brackets (20) to hull front plate (21) with four lockwashers (22) and four nuts (23). 12 Cut 3.5 in. (8.
TM 9-2350-311-34-1 14 Place heater exhaust assembly (29) with hose clamp (30) in mounted position between coolant heater mounting brackets (20). 15 Install inlet elbow (31) and outlet elbow (32) to coolant heater assembly (33). 16 Place hose clamp (34) over end of 0.625-in. - (1 5.9-mm-) id by 18-in. - (45.7-cm-) long hose (35). Install hose to heater inlet elbow (31 ) and tighten clamp. 17 Place coolant heater assembly (33) in powerplant compartment as shown below.
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued 18 Place coolant heater assembly (33) on two coolant heater mounting brackets (20) and clamp with four retaining bands (38) and four screws (39). 19 Install four retaining bands (38), two screws (40), two Iockwashers (41), and two nuts (42). 20 Install exhaust tube end support bracket (43), three flat washers (44), and three screws (45) to three hull front plate tapping blocks.
TM 9-2350-311-34-1 10-9
TM 9-2350-311-34-1 10-1 WINTERIZTION KIT INSTALLATION - CONTINUED a. Installation — Continued Plug must be removed from exhaust outlet before operating winterization kit to avoid damaging vehicle. 25 Remove three screws (55) from engine coolant pump inlet adapter (56). Discard screws. 26 Position pump (57) and inlet adapter (56) against base bracket (58) so pump suppressor (59) is 30° forward from vertical position (to clear hull front plate) and install three screws (60) and three Iockwashers (61).
TM 9-2350-311-34-1 30 Install elbow (72) and adapter (73) to fuel filter (74) inlet and outlet openings. 31 Install fuel filter (74) with elbow (72) and adapter (73) to bracket (75) with two screws (76), two flat washers (77), and two nuts (78). 32 Install two adapters (79 and 80) and two nuts (81) to electric fuel pump outlet opening (83) and inlet opening (82). 33 Install two shock mounts (84), two nuts (85), and two flat washers (86) to bracket (75).
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued NOTE Install Iockwasher between ground strap and screw head. 34 Install bracket (75) with fuel filter (74), electric fuel pump (87), and ground strap (91) to hull front plate (21) using Iockwasher (93), flat washer (94), and two screws (95). 35 Remove plug from right engine coolant manifold (96) and install elbow (97). 36 Install hose clamp (98) to 0.625- in.- (1 5.9-mm-) id by 78-in. - (1.98-m-) long hose (99).
TM 9-2350-311-34-1 10-13
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued 40 Remove engine access door in driver’s compartment (TM 9-2350-311-20-1). Disconnect fuel main supply hose at quick-disconnect coupling (106) on primary fuel filter (107). 41 Remove plug (108) on primary fuel filter top inlet opening and install elbow (109).
TM 9-2350-311-34-1 NOTE Refer to TM 9-2350-311-20-1 for M109A2 vehicle procedure. 45 Connect fuel main supply hose (114) to primary filter quick-disconnect coupling (106). Install engine access door in driver’s compartment. 46 Remove four screws (115) and four Iockwashers (116). Discard screws. 47 Remove four nuts (117) and gasket (118) covering opening in driver’s compartment bulkhead (119).
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued 49 Connect coolant heater harness plug (123) to heater receptacle (1 24). 50 Connect harness lead (125) connector to heater coolant pump. Support harness lead with right headlight group support strap. 51 Connect harness lead (circuit 402C) (126) to electric fuel pump connector. 52 Remove mounting screw (127) from coolant heater mounting bracket (20) and install harness ground lead (128).
TM 9-2350-311-34-1 57 Connect control box-to-driver’s compartment harness plug (138) at control box receptacle (139). Connect harness branch lead (140) to box lead connector (141). 58 Connect control box-to-driver’s compartment harness plug (142) to coolant heater harness receptacle (121 ) in driver’s compartment bulkhead (119).
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued NOTE • For vehicle circuitry incorporating the 3-position MASTER switch (one position marked SLAVE), disconnect vehicle harness lead 459B at MASTER switch and connect kit harness branch labeled 459B between MASTER switch and vehicle harness lead 459B. • Steps 59 thru 61 apply to vehicles with engine model 7083-7396. Steps 62 thru 64 apply to vehicles with engine model 7083-7391.
TM 9-2350-311-34-1 65 Install two battery jumper leads (151) on battery terminals and tighten lugs (152, 153, and 154). 66 Place grommet (155) over front battery ground lead (1 56), slide grommet over lead, and position in slot on front battery winterization box. 67 Install front battery ground lead (156) on battery B negative terminal and tighten lug. 68 Place grommet (157) on master relay lead (158) and install lead.
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued 70 Slide rear insulation blanket (161) over batteries. Guide free end of rear battery ground lead (circuit 7) (160) through grommet (162) in blanket and position rear of blanket under rear winterization box tab (163).
TM 9-2350-311-34-1 75 Place holddown strip (172) for intake grille tarpaulin (173) on grille to serve as template for screw holes. Mark and remove strip. Drill and tap six 5/1 6-24 UNF-28 holes. 76 Locate 10 footman’s loop-type fasteners (1 74) and weld into place (TM 9-237). 77 Install intake grille tarpaulin (173) with straps (175) and webbing down. Install six 5/16-24 by 3/4-in. screws (176) and flat washer (177) in holddown strip (172).
TM 9-2350-311-34-1 10-1 WINTERIZATION KIT INSTALLATION — CONTINUED a. Installation — Continued 79 Place exhaust grille tarpaulin (178) holddown strip (179) on grille to serve as template. Locate hole at front of grille and tap six 5/16-24 UNF-28 holes. 80 Locate five loop-type fasteners (180) and weld into position (TM 9-237). 81 Remove four screws (181), install exhaust grille tarpaulin (178) with straps (1 82) up and webbing down, and install five screws (183) and five flat washers (184).
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Refill cooling system (TM 9-2350-311-20-1) 10-23
TM 9-2350-311-34-1 SECTION Il. WINTERIZATION KIT COMPONENTS 10-2 COOLANT HEATER This task covers: a. Disassembly b.
TM 9-2350-311-34-1 10-25
TM 9-2350-311-34-1 10-2 COOLANT HEATER — CONTINUED a. Disassembly — Continued Use caution when removing compression sleeve from steel tube of flame detector switch. Compression sleeve will normally be seated against probe. Failure to comply will result in equipment damage. 15 Loosen nut (30) and remove flame detector switch (23). 16 Remove compression sleeve (31) and nut (30). Discard compression sleeve. 17 Disconnect two leads (32 and 33) from connector (34) on overheat thermostat (20).
TM 9-2350-311-34-1 10-27
TM 9-2350-311-34-1 10-2 COOLANT HEATER — CONTINUED a. Disassembly — Continued Compression sleeve is to be removed only if resistor requires replacement. Compression fitting is pressed securely to fuel tube and must be cut or ground off. NOTE Compression sleeve must be removed before removing resistor from fuel tube. 33 Remove union (63), compression sleeve (64), nut (36), resistor (55), and flange (58). Discard compression sleeve.
TM 9-2350-311-34-1 10-29
TM 9-2350-311-34-1 10-2 COOLANT HEATER — CONTINUED a. Disassembly — Continued NOTE Perform step 45 only if nameplate requires replacement. 45 Remove four blind rivets (88) and nameplate (89). Discard blind rivets. 46 Install two grommets (90). b. Assembly 1 Install two grommets (90). 2 Install nameplate (89) and four new blind rivets (88) (if removed). 3 Spread housing (16) open and install heat exchanger (69). 4 Install three screws (87).
TM 9-2350-311-34-1 12 Install burner assembly (68), new preformed packing (70), and new gasket (71) to heat exchanger (69). 13 Install two clamps (66), two nuts (65), and two hook bolts (67) to secure burner assembly (68). 14 Install flange (58), preheat resistor (55), nut (36), new compression sleeve (64), and union (63) to fuel tube (40).
TM 9-2350-311-34-1 10-2 COOLANT HEATER — CONTINUED a. Assembly — Continued 15 Install fuel tube (40) and resistor (55) as an assembly. 16 Install cable (62) to resistor (55) with two new assembled screws (60) and two nuts (61). 17 Install tapping plate (59). 18 Install two screws (57) to tapping plate (59). 19 Install igniter (53) and new gasket (56). 20 Install preheat resistor (55) to igniter (53) with two nuts (54).
TM 9-2350-311-34-1 10-33
TM 9-2350-311-34-1 10-2 COOLANT HEATER — CONTINUED a. Assembly — Continued 33 Install three leads (27, 28, and 29) and five screws (26). 34 Position receptacle (13) on engine coolant heater assembly (11) and install sleeve (25) over five receptacle leads (15, 17, 19, 21, and 22). 35 Connect leads (21 and 22) to flame detector switch (23). 36 Connect lead (19) to overheat thermostat (20). 37 Connect lead (17) to restriction thermostat (18).
TM 9-2350-311-34-1 NOTE FOLLOW-ON MAINTENANCE: Install engine coolant heater (TM 9-2350-311-20-1) 10-35
TM 9-2350-311-34-1 10-3 BLOWER MOTOR ASSEMBLY This task covers: a. Removal b. Installation General mechanic’s tool kit (item 14, Appx C) a. Removal 1 Loosen four nuts (1). 2 Turn blower motor assembly (2) counterclockwise to clear bayonet slots (3) and pull straight off coolant heater body (4). b. Installation 1 Install blower motor assembly (2) straight onto coolant heater body (4). Turn assembly clockwise to secure position. 2 Tighten four nuts (1).
TM 9-2350-311 -34-1 APPENDIX A REFERENCES GENERAL This appendix provides a list of regulations, pamphlets, forms, manuals, bulletins, and circulars referenced in this manual. Appropriate indexes should be consulted frequently for latest applicable changes, revisions, and additions. CONTENTS A-1 A-2 A-3 A-4 A-5 A-6 A-7 A-8 PAGE ARMY REGULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A-2 DEPARTMENT OF THE ARMY PAMPHLETS. .
TM 9-2350-311-34-1 A-1 ARMY REGULATIONS Accident Reporting and Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. AR 385-40 Malfunctions Involving Ammunition and Explosives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 75-1 Army Logistics Readiness and Sustainability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..AR 700-138 A-2 DEPARTMENT OF THE ARMY FORMS Recommended Changes to Publications . . . . . . . . . . . . . .
TM 9-2350-311-34-1 Operator’s Manual: Howitzer, Self-Propelled: 155MM, M109A2 (2350-01 -031 -0686), M109A3 (2350-01 -031 -8851), M109A4 (2350-01-277-5770), and M109A5 (2350-01-281-1719) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. TM 9-2350-311-10 Organizational Maintenance Manual for Hull, Powerplant, Drive Controls, Tracks, Suspension and Associated Components.
TM 9-2350-311-34-1 A-7 TECHNICAL MANUALS — CONTINUED Direct Support and General Support Maintenance Manual: Generator, Engine Accessory, AC, Prestolite Model AMA-510-2UT (FSN 2920-909-2483); Leece-Neville Models 3002AC and 3002AD (2920-475-1446), 2184AC (2920-782-1 955), and 5300GP (2920-818-8635), and Regulator, Generator Leece-Neville Model 3392R12P (2920-540-9476) . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 APPENDIX B EXPENDABLE AND DURABLE ITEMS LIST General This appendix lists expendable supplies and materials you will need to maintain the M109A2/M109A3/M109A4/M109A5 Howitzer. CONTENTS Section I B-1 B-2 Section ll PAGE INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 SECTION I. INTRODUCTION B-1 SCOPE This appendix lists expendable and durable items needed to maintain the M109A2/M109A3/M109A4/M109A5 Howitzers. These items are authorized to you by CTA 50-970, Expendable Items (Except Medical, Class V, Repair Parts, and Heraldic Items). B-2 EXPLANATION OF COLUMNS a. Column (1) — ITEM NO. This number is assigned to the entry in the list and is referenced to identify the material, e.g., “Acetone (item 1, Appx B).” b.
TM 9-2350-311-34-1 SECTION Il. EXPENDABLE AND DURABLE ITEMS LIST (1) (2) (3) (4) (5) ITEM NO. LEVEL NATIONAL STOCK NUMBER DESCRIPTION U/M 1 6810-00-184-4796 Acetone, technical, 5 gal (19 L) can: (81348) O-A-51 CN 2 8040-00-664-4318 Adhesive, rubber based, general purpose, type II,1 pt (0.47 L) can: (81348) MMM-A-1617 PT 3 8040-00-701-9546 Adhesive, 1 oz (30 mL) primer-bottle, 4.
TM 9-2350-311-34-1 (1) (2) (3) (4) (5) ITEM NO. LEVEL NATIONAL STOCK NUMBER DESCRIPTION U/M 14 8010-01-309-0328 Primer, epoxy coating (CARC), component A, 1 gal (3.8 L); component B, 1 qt KT (0.9 L) kit: (81349) MIL-P-53022 15 8010-01-193-0520 Primer, epoxy coating (CARC), component A; 1 gal (3.8 L); component B, 1 qt (0.
TM 9-2350-311-34-1 APPENDIX C TOOL IDENTIFICATION LIST GENERAL This appendix lists tools and equipment you will need to maintain the M109A2/M109A3/M109A4/M109A5 Howitzer. CONTENTS C-1 C-2 PAGE EXPLANATION OF COLUMNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2 TOOL IDENTIFICATION LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 C-1 EXPLANATION OF COLUMNS a. Column (1) — ITEM NO. This number is assigned to the entry in the listing and is referenced in the initial setup of procedures to identify the tool. b. Column (2) — NOMENCLATURE Indicates the Federal item name. c. Column (3) — NATIONAL STOCK NUMBER Indicates the national stock number assigned to the tool. d. Column (4) — PN Indicates the manufacturer’s PN for the tool. e.
TM 9-2350-311-34-1 C-2 TOOL IDENTIFICATION LIST (2) NOMENCLATURE (1) ITEM NO.
TM 9-2350-311-34-1 APPENDIX D ILLUSTRATED LIST OF MANUFACTURED ITEMS GENERAL This appendix includes complete instructions for making items authorized to be manufactured or fabricated at direct support and general support maintenance levels. All bulk materials needed for manufacture of an item are listed on the illustration. An index in alphanum eric order is provided for cross-referencing the item to be manufactured to the figure that covers fabrication criteria. ITEM NO.
TM 9-2350-311-34-1 ITEM 1 FAN DRIVE FABRICATED BRACKET Material 0.75- by 0.080-in. (19.1-by 2.03-mm) steel Fabricate bracket from steel according to specifications below.
TM 9-2350-311-34-1 ITEM 2 FINAL DRIVE FABRICATED STAND Material Old sprocket hub (NSN 2520-00-066-0239; PN 19207) 0.125- by 2.5-in. (3.2-by 64-mm) flat steel 1 Fabricate rack from steel to support weight of final drive. 2 Ensure final drive fits comfortably in rack. Bolt rack to upper ring or weld rack to hub (TM 9-237). 3 Before using stand, bolt stand securely to floor through lower ring.
TM 9-2350-311-34-1 ITEM 3 FABRICATED PAD Material 0.5-in. (13-mm) thick thermal glass fiber felt insulation (type II; MIL-I-16411) Glass cloth (type I; class 9; MIL-C-20079) Fibrous glass cord (type SR-4-5; MIL-I-3158) 1 2 Fabricate pad according to specifications below. Stitch with fibrous glass cord as required to maintain shape.
TM 9-2350-311-34-1 ITEM 4 FABRICATED REMOVAL/INSTALLATION TOOL Material 0.125- by 0.69-in. (3.2-by 17.5-mm) steel Fabricate removal/installation tool from steel according to specifications below. Figure 4 ITEM 5 VANEAXIAL FAN GEAR BOX FABRICATED MEASURING BAR Material 0.125- by 0.75-in. (3.2-by 19.1-mm) steel Fabricate measuring bar from steel according to specifications below.
TM 9-2350-311-34-1 APPENDIX E TORQUE LIMITS GENERAL This appendix provides general wet torque limits for screws used on the M109A2/M109A3/M109A4/M109A5 Howitzer. Specific torque limits are indicated in the maintenance procedures for applicable components. The general torque limits given in this appendix shall be used when specific torque limits are not provided in the maintenance procedure.
TM 9-2350-311-34-1 E-1 TORQUE LIMITS Table E-1 lists wet torque limits. Wet torque limits are used on screws with high-pressure lubricants applied to threads. E-2 HOW TO USE TORQUE TABLE 1 Measure diameter of screw you are installing. 2 Count number of threads per in. or use a pitch gage. 3 Under heading “SIZE", look down "DIA IN.” column until you find diameter of screw being installed (there will usually be two lines beginning with same size). 4 Use “THREADS PER IN.
TM 9-2350-311-34-1 TABLE E-1 TORQUE LIMITS FOR WET FASTENERS TORQUE SIZE SAE CAP SCREW HEAD MARKINGS SAE GRADE NO. 1 OR 2 SAE GRADE NO. 5 SAE GRADE NO. 6 OR 7 DIA IN. THREADS PER IN. DIA MM LB-FT N•M LB-FT N•M LB-FT 1/4 1/4 5/16 5/16 3/8 3/8 7/16 7/16 1/2 1/2 9/16 9/16 20 28 18 24 16 24 14 20 13 20 12 18 6.35 6.35 7.94 7.94 9.53 9.53 11.11 — 12.70 — 14.
TM 9-2350-311-34-1 E-3 TIGHTENING METAL FASTENERS When torquing fastener, select torque wrench with range (Table E-2) that fits required torque value. A torque wrench is most accurate from 25% to 75% of its stated range. A torque wrench with stated range of 0-100 Ib-ft (0-136 N•m) will be most accurate from 25-75 Ib-ft (34-102 N•m). Accuracy of readings will decrease as you approach 0 Ib-ft (0 N•m) or 100 Ib-ft (136 N•m).
TM 9-2350-311-34-1 E-5 FASTENER GRADE In addition to thread type classification, threaded fasteners are also classified by material. The most familiar fastener classification system is the SAE grading system (Table E-4).
TM 9-2350-311-34-1 APPENDIX F MANDATORY REPLACEMENT PARTS GENERAL This appendix provides a cross-reference list of mandatory replacement parts and is included for that purpose only. PAGE CONTENTS EXPLANATION OF COLUMNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2 F-1 F-2 MANDATORY REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
TM 9-2350311-34-1 F-1 EXPLANATION OF COLUMNS a. Column (1) — ITEM NO. This number is assigned to the entry in the listing for cross-referencing to the part number. b. Column (2) — PN Indicates the PN used by the manufacturer (individual, company, firm, corporation, or Government activity), that controls the design and characteristics of the item by means of its engineering drawings, specification, standards, and inspection requirements to identify an item or range of items. c.
TM 9-2350-311-34-1 F-2 MANDATORY REPLACEMENT PARTS LIST ( 1 ) ITEM NO.
TM 9-2350-311-34-1 F-2 MANDATORY REPLACEMENT PARTS LIST — CONTINUED (1) ITEM NO.
TM 9-2350-311-34-1 2 (1) PN ITEM NO.
TM 9-2350-311-34-1 INDEX PAGE CONTENTS A Aircleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9,5-25 Air cleaner blower motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 CONTENTS PAGE D — CONTINUED Driver’s bulkhead-to-master relay wiring harness (M109A4/M109A5) (engine model 7083-7391) . . . . . . . . . . . ...7-20 Driver’s bulkhead-to-master relay wiring harness (M109A4/M109A5) (engine model 7083-7396) . . . . . . . . . . . . . . 7-16 Durable items. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 E Electric fuel pump. . . . . . . . . . .
TM 9-2350-311-34-1 PAGE CONTENTS Pads . Repair Straps Lower. Upper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . 5-20 5-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . .... ... . . . . . . . . . . . . . . . . . . . . . . . 5-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 CONTENTS PAGE M Maintenance forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-5 Mandatory replacement parts.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1 Manufactured items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 PAGE CONTENTS R Records, maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-5 Rectifier (M109A2/M109A3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...7-78 Rectifier (M109A4/M109A5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-2350-311-34-1 PAGE CONTENTS T — CONTINUED Personnel ventilation blower... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5,3-11 Quick guide to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Suspension system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
By Order of the Secretary of the Army: GORDON R. SULLIVAN General, United States Army Chief of Staff Official: Milton H. Hamilton MILTON H. HAMILTON Administrative Assistant to-the Secretary of the Amy 07482 DISTRIBUTION: To be d i s t r i b u t e d in requirements for TM accordance with 9–2350-311-34-1 . * U.S.
— PIN: 061100-000
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