TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 113 of 1207
TM 9-2320-361-20
Table 2-2. Mechanical Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1. ENGINE WILL NOT CRANK
Step 1. Check starting system (table 2-4, electrical troubleshooting, malfunction 2).
Step 2. Remove starter and visually check starter drive, ring gear, and flywheel for broken and
missing teeth.
a. If starter teeth are damaged, replace starter (para. 4-7).
b. If ring gear is damaged, notify your supervisor.
WARNING
Ensure fuel shutoff valve is OFF and remove throttle cable before
cranking engine. Failure to do so may result in injury to personnel.
Step 3. Check for seized engine or fluid-locked pistons. Remove radiator and rotate engine at
vibration damper bolt two full revolutions with starter removed.
If engine is seized, notify your supervisor.
Step 4. Check belt-driven engine accessories and water pump for seizure. Remove all belts
(para. 4-2 and 8-28).
Manually turn drive pulley of each accessory and water pump.
a. If water pump drive pulley will not turn, replace water pump (para. 3-47).
b. If any drive pulley accessory will not turn, replace accessory (paras. 3-47, 4-3, and 8-26).
If fuel pump needs replacement, notify your supervisor.
Step 5. Check air induction system for presence of water.
Remove air cleaner cover (para. 3-14).
a. If air cleaner cover is contaminated with water, replace element (para. 3-14).
b. If water is present within air cleaner, notify your supervisor.
Step 6. Check vertical exhaust system and turbocharger for presence of water. Remove exhaust
elbow from turbocharger (para. 3-37).
a. If water is present in exhaust elbow, disassemble and drain exhaust system (para. 3-37).
b. If water is present in turbocharger housing, identified by water on turbocharger fins or
hub, notify your supervisor.
END OF TESTING!
2. ENGINE CRANKS BUT WILL NOT START
Step 1. Refer to table 2-4, electrical troubleshooting, malfunction 3.
Step 2. Check air cleaner indicator (TM 9-2320-361-10).
a. If red appears at indicator window, inspect air intake head for restrictions. If
restrictions are not present, replace air cleaner element (para. 3-14).
b. Reset air cleaner indicator (TM 9-2320-361-10).
●
Diesel fuel is flammable. Do not perform fuel system procedures
near open flame. Injury or death to personnel may result.
●
Compressed air source will not exceed 30 psi (207 kPa). When
cleaning with compressed air, eyeshields must be worn. Failure to
wear eyeshields may result in injury to personnel.
2-28
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