TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 160 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-10.
TROUBLESHOOTING SYMPTOM INDEX.
MALFUNCTION
MALFUNCTION
TROUBLESHOOTING
NO
PROCEDURE
PAGE
BRAKE SYSTEM (Continued)
115
Park Brakes Will Not Apply.
................................................................................................
2-308
116
Service Brakes are Weak or Slow Working (All Wheels) .
..................................................
2-308
117
Front Service Brakes are Weak or Slow Working .
.............................................................
2-308
118
Rear Service Brakes are Uneven or Erratic.
.......................................................................
2-310
119
Service Brakes are Uneven or Erratic on One or
More Wheels.
......................................................................................................................
2-310
120
Brakes Overheat.
................................................................................................................
2-312
121
Stop lamps Do Not Operate (Brakes Normal) .
...................................................................
2-314
122
Pressure Gage(s) Not Indicating or Not Accurate
(Brakes Normal).
.................................................................................................................
2-314
123
Air Horn Not Working.
.........................................................................................................
2-316
124
Windshield Wipers Not Working .
........................................................................................
2-316
125
Interaxle Differential Lockout Not Working .
........................................................................
2-316
WHEELS
126
Tires Wearing Unevenly .
....................................................................................................
2-318
127
Noisy or Bumping Sounds While Traveling on Road.
.........................................................
2-318
STEERING SYSTEM
128
Front Tires Wearing Unevenly.
...........................................................................................
2-320
129
Vehicle Does Not Fully Steer from Stop to Stop.
................................................................
2-321
130
Front End Wanders .
...........................................................................................................
2-321
131
Front End Shimmies .
..........................................................................................................
2-323
132
Vehicle Oversteers .
............................................................................................................
2-324
133
Hard Steering in One Direction.
..........................................................................................
2-325
134
Hard Steering in Both Directions.
........................................................................................
2-325
135
Lost Motion or Excessive Play in Steering Wheel .
.............................................................
2-326
FRAME AND TOWING ATTACHMENTS
136
Towing Pintle Does Not Pivot or Latch, or Jaw is Stuck.
....................................................
2-326
137
Excessive Jerking of Towed Trailer.
...................................................................................
2-327
138
Excessive Noise or Popping Sounds from Fifth
Wheel when Turning.
..........................................................................................................
2-327
2-35
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