TM-9-2320-285-24-1
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-1 - Page 542 of 987
TM 9-2320-285-24-1
2-45.
TROUBLESHOOTING SYMPTOM INDEX
Para/Malfunction
Page
SERVICE BRAKE SYSTEM
Front or rear axle brakes release slowly .
.........................................................
2-46/1
2-520
Uneven or erratic front axle brakes .
.................................................................
2-46/2
2-520
Uneven or erratic rear axle brakes.
...................................................................
2-46/3
2-521
Front axle brakes automatic adjustment not operating .
...................................
2-46/4
2-522
Front axle brakes dragging .
..............................................................................
2-46/5
2-523
Rear axle brakes dragging .
..............................................................................
2-46/6
2-524
Front axle brakes grabbing.
...............................................................................
2-46/7
2-526
Rear axle brakes grabbing .
..............................................................................
2-46/8
2-526
Front axle brakes linings wear unevenly .
.........................................................
2-46/9
2-527
Rear axle brakes linings wear unevenly .
..........................................................
2-46/10
2-528
Front axle brakes frozen or locked.
...................................................................
2-46/11
2-529
Rear axle brakes frozen or locked .
..................................................................
2-46/12
2-529
Insufficient brake force to stop vehicle (front axle
brakes ) .
....................................................................................................
2-46/13
2-530
Insufficient brake force to stop vehicle (rear axle
brakes) .
.....................................................................................................
2-46/14
2-531
Front axle brakes squeak or groan, or scraping noise
when applied .
............................................................................................
2-46/15
2-531
Rear axle brakes squeak or groan, or scraping noise
when applied .
............................................................................................
2-46/16
2-532
AIR BRAKE SYSTEM
Rapid pressure drop after engine is shut down (brakes
released) .
..................................................................................................
2-47/1
2-533
Rapid pressure drop after engine is shut down (brakes
applied).
.....................................................................................................
2-47/2
2-533
Pressure builds up slowly .
................................................................................
2-47/3
2-534
Pressure won’t build up to normal.
....................................................................
2-47/4
2-534
Parking (spring) brakes won’t release .
.............................................................
2-47/5
2-535
AIR COMPRESSOR
Pressure too high, or air compressor won’t cut out.
..........................................
2-48/1
2-535
Pressure builds up slowly.
.................................................................................
2-48/2
2-535
Air compressor knocks .
....................................................................................
2-48/3
2-536
TRAILER BRAKE LINES AND COUPLINGS
Trailer brakes do not release .
...........................................................................
2-49/1
2-536
Trailer service brakes do not function (cab guard).
...........................................
2-49/2
2-537
Trailer service brakes do not function (rear of
tractor).
......................................................................................................
2-49/3
2-538
2-519
Back to Top
