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 18 of 764

TM 9-2320-361-34
MECHANICAL SYSTEMS
TROUBLESHOOTING SYMPTOM INDEX
MALFUNCTION
TROUBLESHOOTING
NO.
MALFUNCTION
PROCEDURE
PAGE
1.
2.
3.
4.
5.
6.
9.
10,
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31
32.
33.
34.
35.
36.
ENGINE
Engine will not crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-6
Starter cranks engine slowly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-7
Engine cranks but will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Engine starts but stops when accelerator is operated . . . . . . . . . . . . . 2-8
Engine stops
when accelerator
is returned to idle position. . . . . . . . . .
2-8
Poor acceleration and/or lack of power. . . . . . . . . . . . . . . . . . . . . . . . 2-8
Engine delivers excessive black exhaust smoke . . . . . . . . . . . . . . . . .
2-8
Engine surges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-8
Engine misfires during operation. . . . . . . . . . . . . . . . . . . . . . . . . . .
2-9
Engine stops during normal operation. . . . . . . . . . . . . . . . . . . . . . . .
2-9
Exhaust color blue during normal operation . . . . . . . . . . . . . . . . . . .
2-9
Exhaust color white during normal operation and idle . . . . . . . . . . . .
2-10
Engine oil pressure low or zero at normal operating temperature. . . . .
2-11
Engine oil pressure extremely high at normal operating temperature. .
2-12
Engine oil loss
during normal operation . . . . . . . . . . . . . . . . . . . . . .
2-13
Engine noise abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-13
Engine vibration abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-14
FUEL SYSTEM
No fuel at fuel injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-14
Low fuel supply at injector nozzles.
. . . . . . . . . . . . . . . . . . . . . . . . .
2-16
Fuel injectors inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Fuel injectors deliver excess fuel into engine . . . . . . . . . . . . . . . . . . .
2-16
COOLING SYSTEM
Coolant loss during normal operation . . . . . . . . . . . . . . . . . . . . . . . .
2-17
Coolant temperature excessive.
. . . . . . . . . . . . . . . . . . . . . . . . . . .
2-17
CLUTCH
Vehicle will not move or
engine stalls
with clutch
engaged. . . . . . . . . .
2-17
Burning odor
evident with clutch engaged. . . . . . . . . . . . . . . . . . . . .
2-18
Clutch noisy during engagement and disengagement . . . . . . . . . . . . .
2-18
Vibration during clutch engagement. . . . . . . . . . . . . . . . . . . . . . . . .
2-19
Clutch pedal will not travel depress . . . . . . . . . . . . . . . . . . . . . . .
2-19
TRANSMISSION
Transmission oily. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-19
Transmission leaks oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-19
Transmission
grinds and/or pops out of gear during shifting . . . . . . . .
2-20
TRANSFER CASE
Transfer case will not operate front differential . . . . . . . . . . . . . . . . .
2-20
Transfer case will not operate rear dfierential. . . . . . . . . . . . . . . . . .
2-20
Transfer case leaks oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-20
Transfer case noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-21
Transfer case grinds or pops out of gear during normal
vehicle operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-21
2-3


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