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Page Title:
MECHANICAL SYSTEMS TROUBLESHOOTING INDEX - DIRECT SUPPORT |
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 TM 9-2320-361-24-1
FIELD TROUBLESHOOTING
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL)
MECHANICAL SYSTEMS TROUBLESHOOTING INDEX - DIRECT SUPPORT
MALFUNCTION
TROUBLESHOOTING
NO.
MALFUNCTION
WORK PACKAGE/PAGE
ENGINE
1.
Engine will not crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Starter cranks engine slowly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Engine cranks but will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Engine starts but stops when accelerator is operated . . . . . . . . . . . . . . . . . . . . . . . .
5.
Engine stops when accelerator is returned to idle position . . . . . . . . . . . . . . . . . . .
6.
Poor acceleration and/or lack of power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
Engine delivers excessive black smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.
Engine surges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.
Engine misfires during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.
Engine stops during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11.
Exhaust color blue during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.
Exhaust color white during normal operation and idle . . . . . . . . . . . . . . . . . . . . . . .
13.
Engine oil pressure low or zero at normal operating temperature . . . . . . . . . . . . .
14.
Engine oil pressure extremely high at normal operating temperature . . . . . . . . . .
15.
Engine oil loss during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16.
Engine noise abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17.
Engine vibration abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL SYSTEM
1.
No fuel at fuel injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Low fuel supply at injector nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Fuel injectors inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Fuel injectors deliver excess fuel into engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COOLING SYSTEM
1. Coolant loss during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-17
2. Coolant temperature excessive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-17
CLUTCH
1.
Vehicle will not move or engine stalls with clutch engaged . . . . . . . . . . . . . . . . . . .
2.
Burning odor evident with clutch engaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Clutch noisy during engagement and disengagement . . . . . . . . . . . . . . . . . . . . . . . .
4.
Vibration during clutch engagement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Clutch pedal will not travel or depress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0007 00-1
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