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 139 of 985
TM 9-2320-279-20-1
Troubleshooting Index (Cont)
Table 2-8. Troubleshooting Subject Index
Subject
Vehicle System
Page
Air dryer constantly exhausts air
...............................
Air horn does not work .
........................................
Air pressure buildup slow .
.....................................
Air pressure drops rapidly after engine shutdown .
...............
Air pressure warning light and buzzer do not work when air
pressure drops below approximately 65 psi (448 kPa) .
..........
Air system pressure builds up to more than 130 psi (896 kPa) .
....
AUXILIARY PUMP makes excessive noise .
......................
AUXILIARY PUMP fails to deliver rated flow .
...................
AUXILIARY PUMP will not pump fuel .
.........................
Axleswill notlockup .
.........................................
Battery weak or fails to maintain charge .
.......................
Boom operates abnormally, slowly, will not telescope in or out,
or raise or lower .
............................................
Brakes grab when applied .
.....................................
Brakesoverheat .
..............................................
Brakes will not respond properly .
...............................
Cannot bottom load fuel with tanker pump .
.....................
Cannot evacuate fuel from hoses or primary pump stops or fails
to deliver rated flow .
........................................
Circuit breaker open .
..........................................
Compressor cycles constantly .
..................................
Compressor fails to unload .
....................................
Compressor leaks oil or coolant .
................................
Coolant pump fails to operate (indicator light comes on) .
..........
Coolant pump fails to operate (indicator light does not come on) .
..
Crane boom moves slowly .
.....................................
Crane controls sticking .
........................................
Crane does not function .
.......................................
Crane will not operate .
........................................
Differential lock-up does not engage or disengage .
...............
Dimmer switch fails to operate .
.................................
DISCHARGE LINE PRESSURE GAGE (DLPG) or VENTURI/
NOZZLE PRESSURE GAGE (VNPG) not working .
.............
Domelight does not work .
......................................
Electric gages do not work .
.....................................
Engine brake will not operate .
.................................
Engine cranks but does not start when ether injector is
actuated in cold weather .
....................................
Engine fails to crank .
..........................................
ENGINE HIGH IDLE does not operate (M977, M985) .
...........
Electrical .
.................
2-128
Air .
.......................
2-142
Air .
.......................
2-134
Air .
.......................
2-139
Electrical .
.................
2-123
Air .
.......................
2-140
Tanker
....................
2-240
Tanker .
...................
2-240
Tanker
....................
2-230
Air .
.......................
2-143
Electrical .
.................
2-114
Material Handling Crane
(M977, M985, M984El) .
... 2-198
Dual Air Brake .
............
2-168
Dual Air Brake .
............
2-172
Dual Air Brake .
............
2-162
Tanker
....................
2-228
Tanker
....................
2-236
Arctic Heater Kit .
..........
2-256
Air .
.......................
2-138
Air .
.......................
2-137
Air .
.......................
2-139
Arctic Heater Kit .
..........
2-253
Arctic Heater Kit .
..........
2-251
Material Handling
Crane (M983) .
............
2-195
Material Handling Crane
(M977, M985, M984E1) .
... 2-204
Material Handling
Crane (M983) .
............
2-194
Material Handling Crane
(M977, M985, M984E1) .
... 2-196
Front and Rear Axle
Tandems .
.................
2-157
Electrical .
.................
2-121
Tanker
....................
2-209
Electrical .
.................
2-125
Electrical .
.................
2-131
Electrical .
.................
2-114
Fuel .
......................
2-113
Engine .
...................
2-59
Engine .
...................
2-66
Change 3
2-55
Back to Top
