TM-9-2320-279-20-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3
TM-9-2320-279-20-1 - Page 137 of 985
TM
9-2320-279-20-1
Troubleshooting Index (Cont)
Table 2-7. System Symptom Index (Cont)
Troubleshooting
Procedure
Page
FIFTH WHEEL
1.
Excessive movement of trailer kingpin in fifth wheel
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-175
FRONT AND REAR AXLE TANDEMS
1.
Noisy
drive
axle . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .
... . .
.
2.
Differential lock-up does not engage or disengage . . . . . . . . . . . . . . . . . . . .
FUEL SYSTEM
1.
Engine will not start, or stalls . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Engine cranks but does not start when ether injector is actuated in cold weather. . . . . . . . . .
3.
Fuel level gage does not register or registers inaccurately . . . . . . . . . . . . . . . . . . .
HEAVY-DUTY WINCH
1.
Winch cable will not pay out (M984) . . . . . . . . . . . . . . . . . . . .
......
. . . . . . . .
1.1 Winch cable will not pay out (M984El) . . . . . . . . . . . . . . . . . .
.....
. . . . . .
2.
Winch will not rewind (M984)
. . . . . . . . . . . . . . . . . . . .
..........
. . . . . . .
2.1 Winch will not rewind (M984El) . . . . . . . . . . . . . . .
. . . . . . . .
. . . . . . . . . . . . .
2.2 Winch will not operate in either direction . . . . . . . . . . . . . . . .
. . .
. . . . . . . .
3.
Winch makes excessive or unusual noise (M984)
. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Winch operation is jerky, slow, or does not work (M984)
. . . . . . . . . . . . . . . . . . . . . . .
5.
Fairlead/tensioner motor does not operate (M984El) . . . . . . . . . . . . . . . . . . . . . . . .
HYDRAULIC SYSTEM
1.
Winch retriever system or crane jerks when operated
. . . . . . . . . . . . . . .
2.
One or more hydraulic circuits not working
. . . . . . . . . . . . . . . . . . . . . . . . . .
MATERIAL HANDLING CRANE (M983)
1.
Crane does not function .
.............................................
2.
Crane boom moves slowly .
...........................................
3.
Outrigger cylinders will not retract .
..................................
MATERIAL HANDLING CRANE (M977, M985, M984El)
1.
Crane will not operate.
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. .
. . .
. . . . . . . . . . . .
. .
.....
2-196
2.
Outrigger operation slow or abnormal or outriggers will not extend or retract . . . . . . . .
2-197
3.
Mast raises or lowers abnormally, slowly, or will not raise or lower . . . . . . . . . . . . . . . . .
2-197
4.
Boom operates abnormally, slowly, will not telescope in or out, or raise or lower . . . . . . .
2-198
5.
Hoist will not lift or lower load . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . .
2-200
6.
Hoist operation slow or abnormal when lifting or lowering load . . . . . . . . . . . . . . . . . . . . .
2-201
7.
Swing operation slow or abnormal in one or both directions . . . . . . . . . . . . . . . . . . . . . .
2-203
8.
Deleted
9.
Crane controls sticking
. . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-204
10.
Remote controller will not operate crane or operates abnormally . . . . . . . . . . . . . . .
2-204
2-178
2-181
2-185
2-188
2-192
2-192
2-193
2-194
2-156
2-157
2-111
2-113
2-113
2-152
2-153
2-194
2-195
2-196
PERSONNEL ARCTIC HEATER KIT - DELETED
PROPELLER SHAFT AND UNIVERSAL JOINTS
2-155
1.
Noisy or vibrating propeller shaft or U-joints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RETRIEVER SYSTEM (M984El)
1.
Retriever system will not lift load, will not lower load, or will not center tow cylinders
(M984El). . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . .
. . . . .
. . . . . . . . . . . . . . . . . .
.....
2-208
Change 3
2-53
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