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A-31 ENGINE SERVICE MANUAL

Table of Contents – Page 1 of 1

GENERAL INFORMATION

GENERAL SPECIFICATIONS

TORQUE SPECIFICATIONS

SAFETY WARNINGS AND NOTES

OPERATION AND MAINTENANCE

TROUBLESHOOTING

ENGINE FAILS TO START

ENGINE STARVES ON ACCELERATION

ENGINE IS HARD TO START

ENGINE STALLS

ENGINE FIRES INTERMITTENTLY

ENGINE DOES NOT PRODUCE MAXIMUM POWER

CARBURETOR FLOODS

ENGINE STOPS AFTER RUNNING BRIEFLY

ENGINE WILL NOT IDLE

ENGINE BACKFIRES OR MISFIRES

ENGINE WILL NOT ACCELERATE

ENGINE LACKS POWER OR STOPS DURING OPERATION

DISASSEMBLY, INSPECTION, & REPAIR

TYPICAL DISASSEMBLY SEQUENCE

DISASSEMBLE MAJOR COMPONENTS

DISASSEMBLE ENGINE

REASSEMBLY

TYPICAL ASSEMBLY SEQUENCE

ENGINE REASSEMBLY

INSTALL MAJOR COMPONENTS

Summary of content (99 pages)

PAGE 1
A-31 ENGINE SERVICE MANUAL Table of Contents – Page 1 of 1 GENERAL INFORMATION GENERAL SPECIFICATIONS TORQUE SPECIFICATIONS SAFETY WARNINGS AND NOTES OPERATION AND MAINTENANCE TROUBLESHOOTING ENGINE FAILS TO START ENGINE STARVES ON ACCELERATION ENGINE IS HARD TO START ENGINE STALLS ENGINE FIRES INTERMITTENTLY ENGINE DOES NOT PRODUCE MAXIMUM POWER CARBURETOR FLOODS ENGINE STOPS AFTER RUNNING BRIEFLY ENGINE WILL NOT IDLE ENGINE BACKFIRES OR MISFIRES ENGINE WILL NOT ACCELERATE ENGINE LACKS POWER OR STOPS DURIN
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GENERAL INFORMATION General Information . . . . . . . . . . . . . . . . . . . . . . . . . 1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Disassembly, Inspection and Repair . . . . . . . . . . . . . . . . . 3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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GENERAL INFORMATION Table Of Contents 1 General Specifications . . . . . . . . . . . . . . . 1-3 Engine . . . . . . . . . . . . . . . . . . . . . . 1-3 Fuel And Lubrication . . . . . . . . . . . . . . . 1-3 Ignition . . . . . . . . . . . . . . . . . . . . . . 1-3 Torque Specifications . . . . . . . . . . . . . . . . 1-4 Air Filter . . . . . . . . . . . . . . . . . . . . . . 1-4 Carburetor . . . . . . . . . . . . . . . . . . . . 1-4 Carburetor Mount/Reed Plate . . . . . . . . . . 1-4 Clutch . . . . . . .
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GENERAL INFORMATION General Specifications 1 Engine Item Engine Type Air-cooled, 2-Cycle Displacement 1.9 cu. in. (31 cc) Bore 1.37 in. (34.80 mm) Stroke 1.25 in. (31.75 mm) Average Compression 90-120 lbs. (41-55 kg) Piston Ring Width 0.046 in. (1.16 mm) Piston Ring End Gap 0.085 in. (2.159 mm) Piston Ring Side Clearance 0.005 in. max (0.127 mm) Fuel And Lubrication Item Lubrication Fuel/Oil Mixture Fuel/Oil Ratio 32:1 Approx.
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GENERAL INFORMATION Torque Specifications 1 Air Filter Item Air Filter Cover Mounting Screws 15-25 in•lb (1.7-2.8 N•m) Carburetor Item Carburetor/Choke Plate Mounting Screws 35-40 in•lb (3.9-4.5 N•m) Throttle Wire Swivel Screw 9-12 in•lb (1.0-1.4 N•m) Carburetor Mount/Reed Plate Item Carburetor Mount/Reed Plate Mounting Screws 60-65 in•lb (6.8-7.3 N•m) Reed Valve/Reed Backup Plate Mounting Screw(s) 15-20 in•lb (1.7-2.3 N•m) Clutch Item Clutch Cover Mounting Screws 35-40 in•lb (3.9-4.
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GENERAL INFORMATION Crankcase And Cylinder Item 1 Crankcase (Cylinder) Mounting Screws 110-120 in•lb (12.4-13.5 N•m) Crankcase Cover Mounting Screws 67 in•lb (7.5 N•m) Fan Shroud Mounting Screws 110-120 in•lb (12.4-13.5 N•m) Spark Plug 190-210 in•lb (21.4-23.6 N•m) Flex Drive Housing (Boom) Item Boom Clamp Nut 70-80 in•lb (7.9-9.0 N•m) Anti-rotation Screw 15-20 in•lb (1.7-2.3 N•m) Flywheel Item Flywheel Mounting/Square Drive Nut (Non-clutch Models) 150-160 in•lb (16.
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GENERAL INFORMATION Ignition Switch 1 Item Slide Switch Contact To Switch Cover Screw 7-12 in•lb (0.8-1.4 N•m) Slide Switch Contact To Starter Housing Screw 10-15 in•lb (1.1-1.7 N•m) Stop Switch Lead To Starter Housing Screw 10-15 in•lb (1.1-1.7 N•m) Toggle Switch Nut 25-35 in•lb (2.8-3.9 N•m) Muffler Item Muffler Exhaust Tube Screws 15-25 in•lb (1.7-2.8 N•m) Muffler Heat Shield Screw 15-25 in•lb (1.7-2.
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GENERAL INFORMATION SAFETY WARNINGS AND NOTES WARNING: The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols and the explanations with them, deserve your careful attention and understanding. The safety warnings do not by themselves eliminate any danger. The instructions or warnings they give are not substitutes for proper accident prevention measures. Gasoline may be present in the fuel tank, carburetor, fuel lines, or crankcase.
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GENERAL INFORMATION OPERATION AND MAINTENANCE 1 Fuel Recommendations WARNING: PRODUCT IDENTIFICATION NUMBERS When ordering parts, or in any communication involving an engine or product, always give the: • Model Number, and • Serial Number These numbers are located on a decal (or decals) affixed to the unit (Figure 1-1). The identification decal(s) will be located on the engine, metal boom, or plastic housing. The actual location will vary depending on the type of product.
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GENERAL INFORMATION If these types of fuel must be used, use fresh fuel (less than 60 days old) and mix according to the instructions in this section. oz. (11 ml) per gallon of gasoline or mix per instructions on container. NEVER add fuel additives directly to the unit fuel tank. Use Of Blended Fuels Fuel And Oil Mixing Instructions If you choose to use a blended fuel or its use is unavoidable, the following precautions are recommended. 1.
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GENERAL INFORMATION Toggle Switch 1 Slide Switch Figure 1-3. Typical Ignition Switches. 2.6078.003 2. If the unit is equipped with a primer bulb, FULLY PRESS AND RELEASE the primer bulb 5 to 7 times (Figure 1-4). Figure 1-5. Typical Choke Controls. 3.6078.005 4. Place the unit in the starting position (with the trimmer cutting head, cultivator tines, or blower nozzle away from yourself and others). 5. Squeeze the throttle trigger to “FULL THROTTLE” (Figure 1-6).
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GENERAL INFORMATION 9. If the engine does not start, repeat steps 1 to 8. 1 10. After the engine warms up for 5 to 10 seconds, place the choke knob or choke lever in the “RUN” position. To Stop The Engine Place the ignition switch in the “OFF” or “STOP” position. For those units with a momentary (or push-tostop) type switch, push and hold the button or lever until the engine stops completely (Figure 1-7). Figure 1-8. Washing Air Filter Element. 3.6078.008 3.
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GENERAL INFORMATION 4. Check the spark plug gap using a wire feeler gauge. Set the gap to 0.025 inch (0.635 mm) (Figure 111). 1 5. Reinstall the spark plug and torque to 190-210 in•lb (21.4-23.6 N•m). Figure 1-10. Squeezing Excess Oil From Air Filter Element. 3.6078.010 5. Reinstall the air filter in the carburetor/air filter cover assembly. Refer to Part 4 - Engine Assembly.
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GENERAL INFORMATION NOTE: Follow these carburetor adjustment procedures carefully. An incorrectly adjusted carburetor can cause severe engine damage. needles clockwise until they are lightly seated.
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GENERAL INFORMATION c. 1 If the idle speed has changed significantly because of steps a. and b. above, readjust the idle speed screw. Do not smoke while handling gasoline. Never use gasoline as a cleaning agent. Storage For 45 To 60 Days The recommended idle speed for all products is 3,000 to 3,200 RPM. 9. Stop the engine. Install the air filter and restart the engine. Recheck the operation and readjust as necessary. 10.
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GENERAL INFORMATION Special Tools 1 In addition to typical hand tools, the following special tools are required to properly service these engines: • Clutch Tool, P/N 147337 (Figure 1- 13) or P/N 180918 (Figure 1-14). • Flywheel Holder, P/N 612470(Figure 1-15) or P/N 180919(Figure 1-16). • Flywheel Strap Wrench or Spanner Wrench (Commercially available). • 0-250 in•lb (0-28.1 N•m) Torque Wrench (Commercially available). • Torx® Screwdriver or Bit Set (Commercially Figure 1-14.
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GENERAL INFORMATION 1 1-16
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TROUBLESHOOTING General Information . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Disassembly, Inspection and Repair . . . . . . . . . . . . . . . . . 3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TROUBLESHOOTING Table Of Contents Engine Fails To Start . . . . . . . . . . . . . . . . 2-3 Engine Starves On Acceleration . . . . . . . . . . 2-4 Engine Is Hard To Start . . . . . . . . . . . . . . . 2-4 2 Engine Stalls . . . . . . . . . . . . . . . . . . . . . 2-5 Engine Fires Intermittently . . . . . . . . . . . . . . 2-5 Engine Does Not Produce Maximum Power . . . . 2-6 Carburetor Floods . . . . . . . . . . . . . . . . . . 2-6 Engine Stops After Running Briefly . . . . . . . . .
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TROUBLESHOOTING When difficulties occur, be sure to check for simple causes which, at first, may seem too obvious to be considered. A starting problem, for example, could be caused by an empty fuel tank. The following table lists some common causes of operating troubles and the possible causes and remedies. Engine Fails To Start Possible Cause Remedy Ignition switch OFF Turn switch ON Out of fuel or water in fuel Drain tank and blow out fuel lines to remove 2 water.
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TROUBLESHOOTING Engine Starves On Acceleration Possible Cause Remedy Plugged fuel filter Replace fuel filter Improperly adjusted carburetor Adjust carburetor about 1/8 turn 2 Engine Is Hard To Start Possible Cause Fouled, improperly gapped, or broken spark plug Remedy Clean or replace spark plug; set gap to 0.025 inch (0.
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TROUBLESHOOTING Engine Stalls Possible Cause Remedy Dirty or plugged air filter Clean or replace air filter Fouled, improperly gapped, or broken spark plug Clean or replace spark plug; set gap to 0.025 inch (0.
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TROUBLESHOOTING Engine Does Not Produce Maximum Power 2 Possible Cause Remedy Plugged air filter Clean or replace air filter Incorrect fuel mixture Drain tank; refill with correct fuel mixture Plugged muffler Clean or replace muffler Plugged or waterlogged fuel filter Replace fuel filter Improperly adjusted carburetor Adjust carburetor Leaking reed valve Replace reed valve Air leak at carburetor base gasket Tighten carburetor fasteners or replace carburetor base gasket Intermittent spark
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TROUBLESHOOTING Engine Stops After Running Briefly Possible Cause Remedy Partially plugged fuel tank cap vent Clean fuel tank cap vent Dirty or plugged air filter Clean or replace air filter Water in fuel mixture Drain tank and blow out lines Air leak at carburetor base gasket Tighten carburetor mounting fasteners 2 or replace carburetor base gaskets Dirty carburetor fuel inlet needle or passage Replace fuel inlet needle or clean out carburetor Faulty carburetor diaphragm Replace diaphragm L
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TROUBLESHOOTING Engine Will Not Accelerate Possible Cause Remedy Carburetor improperly adjusted Adjust carburetor Air filter clogged Clean or replace air filter Spark plug fouled Clean spark plug and set gap to 0.025 inch (0.
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DISASSEMBLY, INSPECTION, & REPAIR General Information . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Disassembly, Inspection and Repair . . . . . . . . . . . . . . . . 3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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DISASSEMBLY, INSPECTION, & REPAIR Table Of Contents Typical Disassembly Sequence . . . . . . . . . . . 3-5 Disassemble Major Components . . . . . . . . . . 3-6 Drain Fuel From Tank . . . . . . . . . . . . . . 3-6 Remove Engine . . . . . . . . . . . . . . . . . 3-6 Trimmers . . . . . . . . . . . . . . . . . . . 3-6 Cultivators . . . . . . . . . . . . . . . . . . . 3-7 Blowers And Blower/Vacs . . . . . . . . . . . 3-8 Remove Styling Cover . . . . . . . . . . . . . . 3-8 3 Remove Air Filter . . . . . . .
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DISASSEMBLY, INSPECTION, & REPAIR Carburetor Reassembly . . . . . . . . . . . . 3-19 Fuel Metering Side . . . . . . . . . . . . . . 3-19 Fuel Pump Side . . . . . . . . . . . . . . . . 3-21 Final Carburetor Adjustment . . . . . . . . . 3-22 Remove Carburetor Mount/Reed Plate And Fuel Tank . . . . . . . . . . . . . . . 3-22 Trimmers And Cultivators . . . . . . . . . . . 3-22 Blowers And Blower/Vacs . . . . . . . . . . . 3-22 Fuel Tank And Lines Disassembly, Inspection, And Reassembly . . . . . . . . . . .
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DISASSEMBLY, INSPECTION, & REPAIR Starter Disassembly, Repair, And Reassembly . . . . . . . . . . . . . . . . . 3-34 Adding Starter Spring Tension . . . . . . . . 3-34 Starter Disassembly . . . . . . . . . . . . . . 3-35 Inspection And Service . . . . . . . . . . . . 3-37 Starter Reassembly . . . . . . . . . . . . . . 3-37 Remove Ignition Module . . . . . . . . . . . . . 3-40 Remove Flywheel . . . . . . . . . . . . . . . . 3-40 Flywheel Inspection And Repair . . . . . . . 3-41 Remove Fan Shroud . . .
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DISASSEMBLY, INSPECTION, & REPAIR Typical Disassembly Sequence 5. Remove Choke/Carburetor* The following sequence is suggested for complete engine disassembly, inspection, and repair. This procedure can be varied to accommodate individual requirements for disassembly and repair. 6. Remove Carburetor Mount/Reed Plate, And Fuel Tank 7. Remove Muffler* Clean all parts thoroughly as the engine is disassembled. Only clean parts can accurately be inspected and gauged for wear or damage.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS Drain Fuel From Tank WARNING: Explosive Fuel! Gasoline may be present in the fuel tank, carburetor, fuel lines, and crankcase. Gasoline is extremely flammable and its vapors can explode if ignited. Keep sparks, flames, and other sources of ignition away from the engine. Do not smoke while servicing the engine. Never use gasoline as a cleaning agent. AVOID FIRES AND EXPLOSIONS 3 1.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 2. Loosen the screw securing the throttle cable in the swivel on carburetor throttle lever. Remove the throttle cable from the swivel. 3 2.6081.015 Anti-Rotation Screw 3. Remove the anti-rotation screw from the drive housing clamp. 4. Loosen clamp nut and bolt. Drive Housing Clamp 5. Remove engine from the drive housing (boom). 3.6081.016 Cultivators 1. Remove the air filter cover. (Refer to “Remove Air Filter.”) 2.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 3. Loosen the wing screws and clamp securing the handlebars to the handle brackets. Slide the clamps off of the handle brackets. 3 2.6081.017 4. Remove the anti-rotation screw from the drive housing clamp. Anti-Rotation Screw 5. Loosen clamp nut and bolt. 6. Remove engine from the drive housing (boom). Blowers And Blower/Vacs Refer to the Blower and Blower/Vacs Service Manual for complete engine removal procedures.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 2. If necessary, remove the screw securing the cover to the engine stand. 3. If the unit is equipped with an ignition switch installed in the cover, disconnect the switch leads. 3 2.6081.019 Remove Air Filter Two basic air filter styles are used on trimmer and cultivator engines: A “round” air filter with a choke “knob”, or a “square” air filter with choke “lever”. A “square” air filter cover is also used on blowers & blower/vacs.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Square Air Filter—Trimmers And Cultivators 1. Place the choke lever in the “CHOKE” position. 2. Remove the screws securing the air filter cover. Remove the air filter cover assembly from the carburetor mount. 3 2.6081.022 3. Remove the air filter element from the air filter cover. 2.6081.023 Square Air Filter—Blowers And Blower/Vacs 1. Squeeze the air filter cover with your fingers and lift the cover from the air filter base. 2.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 2. Remove the air filter element from the air filter cover. 3 2.6081.025 Remove Choke/Carburetor Round Air Filter—Trimmers And Cultivators 1. If necessary, loosen the screw securing the throttle cable in the swivel on carburetor throttle lever. Remove the throttle cable from the swivel. 2.6081.015 2. Remove the screws securing the carburetor to the carburetor mount. 2.6081.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 3. Remove the fuel line from the carburetor fuel inlet fitting. 3 2.6081.033 4. If the unit is equipped with a primer bulb, remove the fuel line from the fuel outlet fitting on carburetor (to primer bulb). 5. Remove the carburetor and carburetor gasket. 2.6081.033 Square Air Filter—Trimmers And Cultivators 1. If necessary, loosen the screw securing the throttle cable in the swivel on carburetor throttle lever.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 2. Remove the screws securing the choke components and carburetor to the carburetor mount. 3. Remove the wavy washer, choke lever, and choke plate. 3 2.6081.027 4. Remove the fuel line from the carburetor fuel inlet fitting. 2.6081.033 5. Remove the fuel line from the fuel outlet fitting on carburetor (to primer bulb). 6. Remove the carburetor and carburetor gasket. 2.6081.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Square Air Filter—Blowers And Blower/Vacs 1. Loosen the screw securing the throttle cable in the swivel on carburetor throttle lever. Remove the throttle cable from the swivel. 3 2.6081.015 2. For Models 280, 300BV, 310, And 310BV— Disconnect the ground lead from between the carburetor and crankcase. 2.6081.028 3. Remove the screws securing the choke components, air filter base, and carburetor to the carburetor mount. 4.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 5. Remove the fuel line from the carburetor fuel inlet fitting. 6. Remove the fuel line from the fuel outlet fitting on carburetor (to primer bulb). 3 2.6081.033 7. Remove the carburetor and carburetor gasket. 2.6081.030 Remove Primer Bulb Some units are equipped with an air purge primer bulb. The primer bulb is installed into the carburetor mount/reed plate on trimmers and cultivators.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 2. Squeeze the mounting tabs on the back of the bulb and pull the bulb out from the front. Inspect the primer bulb for flexibility and cuts or tears. Replace the primer bulb if necessary. 3 2.6081.031 Carburetor Disassembly, Inspection, Repair, And Reassembly Carburetor Disassembly Fuel Metering Side 1. Remove the high speed mixture (H) and idle mixture (L) adjusting needles and springs. 2.6081.032 2.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 3. Remove the fuel metering diaphragm and gasket. 3 2.6081.034 4. Remove the screw securing the metering lever hinge pin in carburetor body. Remove the metering lever, hinge pin, metering lever spring, and fuel inlet needle. NOTE: These components are under spring tension. Remove them carefully to prevent loss. Make sure the spring is not stretched. 2.6081.035 Fuel Pump Side 1.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 3. Remove the fuel pump cover gasket and pump diaphragm NOTE: Further disassembly to remove the throttle plate, throttle lever, welch plugs, fuel inlet screen, etc. is not recommended. 3 2.6081.037 Inspection and Cleaning Two carburetor service kits are available: a gasket/diaphragm kit and a carburetor repair kit.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 2. Gaskets and diaphragms eventually deteriorate and become stiff with age and use. It is good practice to replace gaskets and diaphragms for each repair. However, if the diaphragm is soft and flexible, you do not need to replace it, unless a complete carburetor rebuild is being performed. 3. Clean the metering cover, pump cover, carburetor body, and filter screen with carburetor cleaner. Blow out all passages with compressed air.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Adjust the metering lever. If the lever is adjusted too high, the engine will Depress Here Then Push Needle Here run rich. If the lever is adjusted too low, the engine will run lean. Poor acceleration and erratic operation may also be noted. Pry Up Here HIGH 3 LOW 3.6081.039 3. Install the metering cover gasket (next to carburetor body) and metering diaphragm.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 5. Install the high speed mixture (H) and idle mixture (L) adjusting needles and springs. Turn both needles clockwise until they are lightly seated. Then turn the needles counterclockwise the following number of turns: High Speed Mixture Screw: 1-1/4 turns Idle Mixture Screw: 1-1/4 turns NOTE: Turn the high speed mixture and idle mixture needles finger-tight.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) (H) High Speed Mixture Needle (L) Idle Mixture Needle Final Carburetor Adjustment Make final adjustments to the carburetor when the unit is fully reassembled. Refer to “Carburetor Adjustment” in Part 1 — General Information. Idle Speed 3 3.6069.010 Remove Carburetor Mount/Reed Plate And Fuel Tank Trimmers And Cultivators 1. Remove the four screws securing the carburetor mount/reed plate to the crankcase. 2.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Model 200/210 1. Remove the screw securing the carburetor mount/reed plate to the crankcase. 2. Remove the carburetor mount/reed plate and carburetor mount/reed plate gasket. 3 2.6081.047 Fuel Tank And Lines Disassembly, Inspection, And Reassembly Fuel Tank And Cap 1. Inspect the fuel tank for cracks, rubbing, or chaffed spots. Replace the tank if necessary. 2.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Fuel Line And Filter Installation 1. Insert a piece of trimmer line through the hole in the bottom of fuel tank to the filler opening. Slide the fuel line over trimmer line. 2. Working through the filler neck, insert the fuel line with the fuel filter and fitting attached through the hole in the bottom of tank. 3 2.6089.049 Fitting 3.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Model 200/210 Blowers 1. Remove the screw(s) securing the reed valve components to the carburetor mount/reed plate. 2. Remove the reed backup, reed, reed valve seat, and valve seat gasket. 3 2.6089.052 Correct Reed And Reed Backup Installation NOTE: Pay attention to the shape of the carburetor mount/reed plate surface the reed and reed backup are mounted on.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Trimmers And Cultivators, And Models 280, 300BV, 310, And 310BV Blowers And Blower/Vacs 1. If applicable, make sure the curve of the reed valve is down. 2. Install the reed, reed backup, and reed mounting screw(s). Torque the screw(s) to 15-20 in•lb (1.7-2.3 N•m). 3 2.6089.051 Model 200/210 Blower 1. Install the reed valve seat gasket and valve seat. 2. Make sure the curve of the reed valve is in the direction shown in 3.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Heat Shield Removal 1. For Models 280, 300BV, 310, And 310BV Blowers And Blower/Vacs— Remove the 4 screws securing the lower plate of heat shield to the main part of shield. 3 2.6089.055 2. Remove the screw securing the heat shield to the muffler 2.6089.056 Exhaust Exit Tube Removal The exhaust exit tube is removable on some mufflers. For all other mufflers, the exhaust tube is welded in place and is not removable.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Inspection And Cleaning The muffler should be removed periodically to inspect for excessive carbon build-up. Excessive deposits around the exhaust ports or exhaust exit holes will cause poor engine performance. 1. Check the inlet port of muffler for excessive carbon deposits. Clean as required. 3 2.6089.058 2. Inspect the baffle inside muffler for carbon buildup. Clean baffle by scraping carbon as required.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR 3. For Models 280, 300BV, 310, And 310BV Blowers And Blower/Vacs— COMPONENTS (cont.)Install the lower plate of heat shield to the main part of shield. Secure the lower plate with 4 screw 2. Install the heat shield and mounting screw to muffler body. Make sure the holes in the heat shield align with mounting holes in muffler body. Torque the screw 15-25 in•lb (1.7-2.8 N•m). 3 2.6089.056 Remove Clutch Some units are equipped with a clutch.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 4. Using clutch tool, P/N 147337, remove the clutch rotor. 5. Remove the spacer sleeve from crankshaft. Flywheel Holder 3 2.6089.061 Flywheel Holder Inspection 1. Check the clutch drum, rotor, and spring for wear or damage. Replace if necessary. Clutch Tool 2. Inspect the condition of the screw head inside of clutch drum. If head is slotted or damaged, replace the clutch drum. 2.6089.062 2.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 4. If the unit is equipped with an ignition switch or push-to-stop in the starter housing, Remove Starter switch Housing disconnect the switch lead from the ignition module. Trimmers And Cultivators 1. If necessary, disconnect the spark plug wire from spark plug and remove the spark plug. 2. Remove the screw securing the shroud extension/engine stand to the starter housing. Remove the shroud extension/engine stand. 3 2.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Blowers And Blower/Vacs— Models 280, 300BV, 310, And 310BV 1. If necessary, disconnect the spark plug wire from spark plug and remove the spark plug. 2. Install flywheel holder, P/N 612470. 3. Remove the crankshaft extension nut from crankshaft. 4. Remove the spacer sleeve from crankshaft. 3 Flywheel Holder 2.6089.066 5. Remove the screw securing the shroud extension to the starter housing. Remove the shroud extension. 2.6089.067 6.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Toggle IgnitionSwitch Switch Replacement Some models are equipped with an ignition switch 1. Disconnect the lead wires from switch. installed in the starter housing or styling cover. Several types of switches have been used. Service the switches as follows: 2. Remove the nut, switch plate and switch body. 3. Reassemble the switch in the reverse order of disassembly. Torque the nut to 25-35 in•lb (2.8-3.9 N•m). 3 3.6090.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Push Button Switch 1. Remove the screw and washer securing the switch into the styling cover. 2. Pull the switch out of the styling cover from the back. The push button cap will come off of the switch as it is removed. 3. Reassemble the switch in the reverse order of disassembly. 3 3.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) NOTE: If necessary, loosen the pulley retainer(s) screw(s) while holding the pulley down to provide clearance between the retainer(s) and pulley. Torque the retainer(s) screw(s) to 2030 in•lb (2.3-3.4 N•m) after additional rope is wound onto pulley. 3 2.6089.082 3. Pull the rope out to its full length and let it return until the pull handle rests against the starter housing.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) 3. Remove the starter pulley from the starter housing. 3 2.6089.074 4. If necessary, carefully remove the starter spring from the starter housing using a needle-nose pliers. NOTE: Once the starter spring is removed from the starter housing, a service replacement spring (prewound and contained in a spring retainer) should be used to reassemble the starter. Reinstallation of the old starter spring is not recommended. 2.6089.075 5.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) Inspection And Service 1. Inspect the starter rope for wear or frays. Replace the rope if necessary. 2. Inspect the starter pulley for worn pawl engagement teeth. Also check for wear on the surface of pulley that is in contact with the starter spring. 3. Make sure old grease and dirt are cleaned from all starter components before reassembling. 3 2.6047.092 Starter Reassembly 1.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR COMPONENTS (cont.) c. Place the spring into the starter housing. Make sure the spring hook is installed over the post in the starter housing. d. Make sure the spring windings are laying flat against the starter housing around the entire circumference of the spring. Hold the spring in this position and carefully release the needle-nose pliers holding the spring. 3 Post 2.6089.079 2. Insert the rope through the hole in starter pulley.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE MAJOR 9. Install the pulley retainer(s) and screw(s). COMPONENTS (cont.) Torque the screws to 20-30 in•lb (2.3-3.4 N•m). 7. Install the pulley/rope assembly into the starter Rotate pulley slightlyand until 10. housing. Pull the rope outthe to its full length letthe it respring hooks onto the pulley and the pulley turn. Check the spring tension and adjust as drops into place. necessary. Refer to “Adding Starter Spring Tension” above. 2.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE 1. For Non-clutch Units and the Model 200/210 Blower— Hold the flywheel with a strap wrench or spanner wrench and remove the flywheel as follows: a. For Non-clutch units— Remove the square drive nut. b. For the Model 200/210 Blower— Remove the flywheel retaining nut and split lock washer. 3 2. Using a plastic-faced mallet, gently tap on the flywheel until it breaks free from the crankshaft. 2.6089.083 3. Remove the flywheel from the crankshaft. 4.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) *NOTE: The pawl pins in this kit are oversized. Once this kit is installed, the flywheel cannot be repaired a second time. For all other damage, replace the flywheel. 3 2.6089.086 2.6060.161 CONTENTS OF KIT #180142 2 Starter Pawl Pins (oversized) 2 Starter Pawl Springs 2 Starter Pawls 3.6078.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) Remove Fan Shroud 1. Remove the screws securing the fan shroud to crankcase. 2. Remove the fan shroud. 3 2.6089.087 Remove Spark Plug, Cylinder, And Piston/connecting Rod Assembly 1. Remove the spark plug from cylinder. Service the spark plug as instructed in Part 1 — General Information. 2.6089.088 2. For Model 200/210 Blower— Remove the crankcase cover screws, crankcase cover, and gasket. 2.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) 3. Remove the cylinder mounting screws. 3 2.6089.090 4. Remove the connecting rod from crankshaft. 5. Remove the cylinder with piston/connecting rod assembly from the crankcase as a unit. Remove the cylinder gasket. 6. Remove the piston/connecting rod assembly from the cylinder. 2.6089.091 2.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) 7. Remove the piston ring from the piston NOTE: Do not disassemble the piston/connecting rod further. Cylinder And Piston Inspection 1. Inspect the cylinder, piston, and piston ring for wear and damage. Refer to the specifications and tolerances in Part 1 — General Information. Replace the cylinder, piston, or piston ring if necessary. 3 2.6089.093 2.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) 2. Remove the outer (sealed) bearing from the flywheel side of the crankcase using a bearing puller. Bearing Puller 3 2.6089.096 3. Remove the inner (unsealed) bearing from the inside of the crankcase. 4. If so equipped, remove the snap rings securing the inner seal in crankcase. Discard the snap rings. 2.6089.097 NOTE: Units with serial number 203125000 and greater do not use snap rings in the crankcase. 2.6089.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) 5. Remove the inner seal from crankcase. 3 2.6089.099 Inspection 1. Inspect the crankcase for nicks, cracks, and deformation. Replace if necessary. 2. Inspect the crankshaft for nicks, cracks, roundness and deformation. Replace if necessary. 2.6090.133 Crankcase Reassembly NOTE: To prevent bearing damage, make sure bearings are fully supported on both the inner and outer races during all pressing operations.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) 1. Make sure the race of the outer (sealed) bearing is packed with grease. If necessary, apply a small amount of a high quality grade 2 lithium-based (or equivalent) bearing grease to the bearing. Keep the grease off of the inner and outer bearing surfaces that mate against the crankcase and crankshaft. 2. Press the outer (sealed)bearing into the crankcase until it is flush with the crankcase sur- 2.6089.100 face.
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DISASSEMBLY, INSPECTION, & REPAIR DISASSEMBLE ENGINE (cont.) 6. Press the crankshaft/bearing assembly into the crankcase until the bearing is flush with the inner surface of the crankcase. Bearing Support 3 2.6089.104 7. Check the clearance between the inner surface of the crankcase and the crankshaft counterweight at several points Recommended clearance is 0.030 in. (0.762 mm). Adjust the location of the crankshaft/bearing if necessary. 2.6089.
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REASSEMBLY General Information . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Disassembly, Inspection and Repair . . . . . . . . . . . . . . . . . . 3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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REASSEMBLY Table Of Contents Typical Assembly Sequence . . . . . . . . . . . . 4-4 Engine Reassembly . . . . . . . . . . . . . . . . . . 4-5 Install Piston/Connecting Rod And Cylinder To Crankcase, Install Spark Plug . . . . . . . . . . . . . . . . . . 4-5 Install Major Components . . . . . . . . . . . . . . . 4-9 Install Fan Shroud . . . . . . . . . . . . . . . . . 4-9 Install Flywheel . . . . . . . . . . . . . . . . . . . 4-9 Install Ignition Module . . . . . . . . . . . . . . .
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REASSEMBLY Install Air Filter . . . . . . . . . . . . . . . . . . . 4-22 Trimmers and Cultivators . . . . . . . . . . . . 4-22 Blowers And Blower/Vacs . . . . . . . . . . . . 4-23 Install Styling Cover . . . . . . . . . . . . . . . . 4-23 Install Engine . . . . . . . . . . . . . . . . . . . . 4-24 Trimmers . . . . . . . . . . . . . . . . . . . . 4-24 Cultivators . . . . . . . . . . . . . . . . . . . . 4-26 Blowers And Blower/Vacs . . . . . . . . . . . . 4-26 Prepare The Unit For Operation . . . . . . . . .
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REASSEMBLY Typical Assembly Sequence 5. Install Starter Housing The following sequence is suggested for complete engine reassembly. This procedure assumes that all components are new or have been reconditioned, and all component subassembly work has been completed. This procedure can be varied to accommodate individual requirements for assembly and repair. 6. Install Clutch 7. Install Muffler 8. Install Fuel Tank And Carburetor Mount/Reed Plate 9.
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REASSEMBLY ENGINE REASSEMBLY Install Piston/Connecting Rod And Cylinder To Crankcase, Install Spark Plug 1. If necessary, install the piston ring onto the piston. Make sure the ring end gap is located over the anti-rotation pin in the piston ring groove. 2.6089.093 4 2. Lubricate the piston and piston ring with 2-Cycle engine oil. Compress the piston ring and insert the piston into the cylinder. 2.6089.
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REASSEMBLY ENGINE REASSEMBLY (cont.) Long Skirt For Model 200/210 Blower— Position the longer skirt of piston so it is on the same side as the exhaust port of cylinder. Exhaust Port 2.6089.108 4 3. Position a new cylinder gasket on cylinder as follows: For Trimmers And Cultivators— Position the longer, straight edge of gasket so it is on the same side as the exhaust port of cylinder. 2.6089.
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REASSEMBLY ENGINE REASSEMBY (cont.) For Model 200/210 Blower— With the exhaust port of cylinder to the left, position the edge of gasket with the small notch to the left (nearest exhaust port) 2.6089.111 Exhaust Port 4 4. Position the cylinder to the crankcase as follows: For Trimmers, Cultivators, and Models 280, 300BV, 310, And 310BV Blowers and Blower/Vacs— Position the exhaust port of cylinder so it is on the same side as the open side of crankcase. 2.6089.112 Carb.
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REASSEMBLY ENGINE REASSEMBLY (cont.) 5. Lubricate the pin on crankshaft counterweight with 2-Cycle engine oil. Slip the connecting rod bearing over the pin. 2.6089.114 4 6. Secure the crankcase to the cylinder with two hex socket head screws. Torque the screws to 110-120 in•lb (12.4-13.5 N•m). 2.6089.090 7. For Model 200/210 Blower— Install a new crankcase cover gasket, the crankcase cover (with flat inner surface towards cylinder), and attaching screws. Torque the screws to 67 in•lb (7.5 N•m). 2.6089.
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REASSEMBLY ENGINE REASSEMBLY (cont.) 8. Make sure the spark plug gap is set to 0.025 inch (0.635 mm) using a wire feeler gauge. Install the spark plug into cylinder and torque to 190-210 in•lb (21.4-23.6 N•m). 2.6089.088 INSTALL MAJOR COMPONENTS 4 Install Fan Shroud 1. Install the fan shroud to crankcase with 4 screws. 2. Torque the screws to 110-120 in•lb (12.4-13.5 N•m). 2.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 2. Position the flywheel so that the key slot in the flywheel aligns with the crankshaft key. Place the flywheel onto the crankshaft. 2.6089.115 4 3. For Clutch Units, and Models 280, 300BV, 310, And 310BV Blowers and Blower/Vacs— Proceed to “Install Ignition Module”. For Non-clutch Units And The Model 200/210 Blower— Secure the flywheel to the crankshaft as follows: a. For Non-clutch Units— Install the square drive nut 2.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) b. Hold the flywheel with a spanner wrench or strap wrench and torque the nut to 150-160 in•lb (16.9-18 N•m). 2.6089.116 4 Install Ignition Module 1. Install the ignition module, the stop switch wire or ground lead tab terminal (if so equipped), and module fastening screws 2. Move the ignition module away from the flywheel as far as possible. Tighten the fastening screws slightly. 3. Insert a 0.010-0.015 in. (0.254-0.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Torque the screws to 28-35 in•lb (3.2-3.9 N•m). Remove the feeler gauge or shim stock. 5. Connect ignition switch lead wires as necessary. 2.6089.083 4 Install Starter Housing Trimmers And Cultivators 1. If the unit is equipped with an ignition switch or pushto-stop switch, connect the switch lead to the ignition module. 2. Install the the starter housing to the fan shroud and secure with four screws. 2.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 3. Install the shroud extension/engine stand around the cylinder. Make sure the tabs in the shroud extension/engine stand are inserted in the slots in the fan shroud. Make sure the spark plug wire and ignition switch leads are properly routed out of the starter housing. 4. Install the fastening screw through the starter housing and into the shroud extension/ engine stand. Torque the screw to 25-35 in•lb (2.8-3.9 N•m). 2.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Crankshaft Extension Nut 4. Install the fastening screw through the starter housing and into the shroud extension. Torque the screw to 25-35 in•lb (2.8-3.9 N•m). Spacer Sleeve 5. Install the spacer sleeve over the crankshaft and install crankshaft extension nut. 2.6089.118 4 6. Install the flywheel holder, P/N 612470. Torque the crankshaft extension nut to 150-160 in•lb (16.9-18 N•m). Flywheel Holder 2.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 3. Install the flywheel holder, P/N 612470. Using clutch tool, P/N 147337, torque the clutch rotor to 150-160 in•lb (16.9-18 N•m). Clutch Tool 2.6089.121 4. Apply a small amount of Loctite® #271 to the female threads of crankshaft. 5. Install the clutch drum to the crankshaft. Torque the screw inside clutch drum to 38-44 in•lb (4.3-5.0 N•m). Flywheel Holder 6. Remove the flywheel holder. 7.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Install Muffler 1. Install a new muffler gasket, muffler, and muffler mounting screws. 2.6089.054 4 For Trimmers And Cultivators— Make sure the extended edge of the cylinder gasket is between the muffler body and muffler heat shield. 3.6089.123 For Model 200/210 Blower— Make sure the shorter, straight edge of muffler gasket is to the top (towards spark plug hole) of cylinder and the angled corner is towards the ignition module. 2 .
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Install Fuel Tank And Carburetor Mount/Reed Plate Trimmers And Cultivators 1. Install the rubber fuel tank mounting pads to the fan shroud and carburetor mount/reed plate. 2. Position the fuel tank against the fan shroud. Install a new carburetor mount/reed plate gasket, the carburetor mount/reed plate, and attaching screws. 2.6089.125 Torque the screws to 60-65 in•lb (6.8-7.3 N•m). 2.6081.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Model 200/210 Blower 1. Install a new carburetor mount/reed plate gasket, carburetor mount/reed plate assembly, and attaching screw. 2. Torque the screw to 60-65 in•lb (6.8-7.3 N•m). 2.6081.047 4 Install Carburetor, Choke, And Connect Fuel Lines Two basic air filter and choke styles are used on trimmer and cultivator engines: A “round” air filter with a choke “knob”, or a “square” air filter with choke “lever”.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 1. Install a new carburetor gasket over the pins on carburetor mount/reed plate. 2.6090.037 2. Install the carburetor and carburetor mounting screws (Figure 4-40). Torque the screws to 35-40 in•lb (3.9-4.5 N•m). 2.6081.026 3. Connect the fuel line(s) to the carburetor and primer bulb (if so equipped). 3.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Square Air Filter—Trimmers And Cultivators 1. Install a new carburetor gasket over the pins on carburetor mount/reed plate. 2.6090.037 4 2. Install the carburetor, choke plate, choke lever, wavy washer, and carburetor mounting screws Torque the screws to 35-40 in•lb (3.9-4.5 N•m). 2.6081.027 3. Connect the fuel lines to the carburetor and primer bulb. Short Fitting (To Carburetor) Long Fitting (From Tank) 3.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Square Air Filter—Blowers And Blower/Vacs 1. For Models 280, 300BV, 310, And 310BV— Install a new carburetor gasket over the pins on carburetor mount/reed plate. 2.6090.037 4 Bushings 2. Make sure the bushings are installed in the air filter base mounting holes. NOTE: Models 280, 300BV, 310, And 310BV blowers and blower/vacs, serial number 206058151 and greater, use a machined, stepped bushing in the mounting hole under the choke lever. 2.6089.129 3.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 4. For Models 280, 300BV, 310, And 310BV— Connect the ground lead from the carburetor to the tab terminal. 5. Connect the fuel lines to the fuel tank when reinstalling the engine in the unit. 2.6081.028 4 Install Air Filter Make sure the air filter element is cleaned and oiled as instructed in Part 1 — General Information. Install the air filter element into the air filter cover. Install the air filter cover as follows: 3.6078.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 2. Install the air filter cover and attaching screws. Torque the screws to 15-25 in•lb (1.7-2.8 N•m). 2.6081.020 4 Blowers And Blower/Vacs 1. Squeeze the air filter cover with your fingers and snap it into the air filter base. 2.6081.024 Install Styling Cover Some units are equipped with an engine styling cover. To install the styling cover: 1. If the unit is equipped with an ignition switch in the styling cover, connect the switch leads. 2.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 3. If so equipped, install the screw that attaches the styling cover to the shroud extension/engine stand. 2.6081.019 4 Install Engine Install the engine to the equipment as follows: Trimmers 1. Slip the upper flex drive housing (boom) clamp assembly onto the clutch cover/starter housing. 2.6089.131 2. If the trimmer is a clutch unit capable of taking attachments, install the compression spring onto the clutch drum. 2.6089.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) 3. Install the engine onto the trimmer flex drive housing. Make sure the flex drive shaft mates with the square drive of engine. Make sure the slot in the flex drive housing aligns with the boss in the clutch cover/starter housing. 4. Install the anti-rotation screw through clamp and into boom. 2.6090.136 Anti-Rotation Screw 4 Torque the anti-rotation screw to 15-20 in•lb (1.7-2.3 N•m). Drive Housing Clamp 5.
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REASSEMBLY INSTALL MAJOR COMPONENTS (cont.) Cultivators 1. Install the engine to the cultivator using steps 2-7 of the procedure for trimmers above. 2. Secure the cultivator handlebars to the handlebar brackets on engine. Blowers And Blower/Vacs Refer to the Blowers and Blower/Vacs Service Manual for complete engine installation procedures. 2.6081.017 4 Prepare The Unit For Operation Before placing the unit back into service, be sure to do the following: • Make sure all fasteners are tightened securely.