TM-9-2320-361-34

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

MAY 1992
TM-9-2320-361-34

  TM-9-2320-361-34 - Page 32 of 764

TM9-2320-361-34
Table 2-1. Mechanical Troubleshooting (Contd).
MALFUNCTlON
TEST OR INSPECTION
CORRECTIVE ACTION
I
Step
2.
Check fuel injection pump timing to engine (para. 5-4).
If fuel injection pump timing to engine is incorrect, adjust to specifications (para. 5-4).
Step
3.
Check fuel injection pump internal timing (malfunction 19, step 3).
Step 4. Check fuel injector nozzles operation (malfunction 18, steps 1 and 2).
Step 5. Perform troubleshooting malfunction 3.
END OF TESTING!
COOLING SYSTEM
WARNING
Hot coolant is under pressure. Care should be used when
removing radiator filler cap or inspecting hot engine coolant
leaks. Steam or hot coolant under pressure may cause severe
injury to personnel.
Wear hand protection at all times when working with heated
parts. Failure to do so may result in injury to personnel.
●
●
22.
COOLANT LOSS DURING NORMAL OPERATION
Flow-test warm engine cooling system (TM 750-254). Observe flow-test reading.
a. If flow-test reading declines and there are no indications of external leaks, coolant is
leaking internally into engine or combustion chambers. Remove oil dipstick and check
engine oil for presence of coolant.
b. If coolant is present on oil dipstick, replace engine (para. 3-18).
END OF TESTING!
23. COOLANT TEMPERATURE EXCESSIVE
Perform troubleshooting malfunction 1, steps 9 and 10.
END OF TESTING!
CLUTCH
24. VEHICLE WILL NOT MOVE OR ENGINE STALLS WITH CLUTCH ENGAGED
Check transmission condition. Place transfer case in neutral and transmission in first gear.
Engage clutch and observe transmission-to-transfer propeller shaft for evidence of rotation.
a.
b.
c.
d.
e.
If engine stalls, disconnect transmission-to-transfer case propeller shaft from
transmission. Verify problem in transmission or transfer case.
Place transmission in neutral. If transmission output shaft will not turn, replace
(para. 8-2) and repair transmission (TM 9-2520-246-34-1).
If transmission-to-transfer case propeller shaft will not spin, remove transmission
(para. 8-2). Remove pressure plate and clutch disc from flywheel (para. 4-l). Check
pressure plate and clutch disc for defects. Verify flywheel condition (para. 3-5).
If pressure plate and clutch disc are defective, replace (para. 4-1).
Check flywheel condition (para. 3-5). If flywheel is burned or damaged, replace (para. 3-5)
and
repair flywheel (TM 9-2815-210-34-2-2).
END OF TESTING!
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