TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 271 of 452
OPERATOR MAINTENANCE
TROUBLESHOOTING MASTER INDEX
TROUBLESHOOTING PROCEDURES
Symptom
Page
AIR CONDITIONING (M915P1, M915A1P1, M916P1, M917P1, and M920P1)
A/C unit does not function .
.............................................................................
WP 0023-22
A/C unit not producing cool air .
.....................................................................
WP 0023-22
Compressor noise or vibration .
........................................................................
WP 0023-23
AIR SYSTEM AND BRAKES
Air system loses pressure during tractor operation or low air pressure
warning lamp and buzzer come on during tractor operation .
........................
WP 0023-10
Low pressure in air system
(low air pressure warning lamp and buzzer are on) .
........................................
WP 0023-9
Trailer brakes will not apply when brake pedal is used or hand control
on steering column is used .
...............................................................................
WP 0023-9
Trailer brakes will not release .
........................................................................
WP 0023-10
DRIVELINE AIR CONTROL SYSTEM
Driveline will not disengage (indicator lamp stays on) when differential
LOCK/UNLOCK is moved to UNLOCK position .
........................................
WP 0023-11
ELECTRICAL SYSTEM
One or more electrical systems not working .
.................................................
WP 0023-14
ENGINE
Engine cranks but does not start .
......................................................................
WP 0023-2
Engine cranks but does not start below 32° F (0° C) .
.....................................
WP 0023-3
Engine does not crank when starter switch is activated .
..................................
WP 0023-2
Engine does not idle properly .
...........................................................................
WP 0023-3
Engine lacks power .
...........................................................................................
WP 0023-5
Engine retarder does not reduce tractor speed .
.................................................
WP 0023-6
Engine starts but misfires or runs rough after proper warmup period .
............
WP 0023-3
Engine temperature exceeds 210° F (99° C) .
...................................................
WP 0023-4
Excessive engine oil consumption .
....................................................................
WP 0023-5
Excessive exhaust noise or fumes in or near cab .
............................................
WP 0023-6
Excessive exhaust smoke after engine reaches normal operating
temperature of 160–185° F (71–85° C) for M915 through M920 or
180–200° F (82–93° C) for M915A1 .
...............................................................
WP 0023-6
Low or no engine oil pressure .
..........................................................................
WP 0023-5
TM 9-2320-273-10
0022
0022-1
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