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 37 of 987
TM 9-2320-285-24-1
2-6.
TROUBLESHOOTING SYMPTOM INDEX (CONT)I
Para/Malfunction
Page
SERVICE BRAKE SYSTEM (cont)
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
(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 .
..................................................................................................
2-48/1,3-22/1
2-535,3-161
Pressure builds up slowly .
............................................................................
2-48/2,3-21/3
2-535,3-154
Air compressor knocks .
................................................................................
2-48/3,3-22/2
2-536,3-161
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
(rear of tractor) .
....................................................................................
2-49/3
2-538
TREADLE VALVE AND BRAKE CONTROLS
Rapid pressure drop after engine is shut down
(brakes released) .
................................................................................
3-21/1
3-154
(brakes applied) .
...................................................................................
3-21/2
3-154
Pressure builds up slowly .
............................................................................
3-21/3
3-154
Pressure too high, or compressor won’t cut out.
...........................................
3-21/4 3-155
Parking (spring) brakes won’t release .
.........................................................
3-21/5
3-155
Parking (spring) brake won’t apply .
..............................................................
3-21/6
3-157
Front and rear service brakes release slowly .
..............................................
3-21/7
3-158
Front service brakes release slowly .
............................................................
3-21/8
3-158
Rear service brakes release slowly .
.............................................................
3-21/9
3-158
Trailer brakes do not release .
.......................................................................
3-21/10
3-159
Trailer service brakes do not function
(cab guard) .
..........................................................................................
3-21/11
3-159
(rear of tractor) .
....................................................................................
3-21/12
3-161
WHEELS AND TIRES
Tire wearing unevenly .
.................................................................................
2-55/1
2-644
Noisy or bumping sound while traveling .
......................................................
2-55/2
2-644
STEERING SYSTEM
Tractor wanders over road .
..........................................................................
2-56/1,3-27/3
2-646,3-227
No recovery .
.................................................................................................
2-56/2,3-27/4
2-646,3-228
Shimmy .
.....................................................................................................
2-56/3,3-27/5
2-646,3-230
High steering effort in both directions .
..........................................................
2-56/4,3-27/8
2-647,3-233
Lost motion at steering wheel .
......................................................................
2-56/5,3-27/9
2-647,3-234
Power steering pump making noise .
............................................................
2-56/6,3-27/11
2-648,3-236
Steering wheel stops turning before tractor
front wheels hit stop blocks .
.................................................................
3-27/1
3-226
Too much play in steering wheel .
.................................................................
3-27/2
3-227
Oversteering or darting .
................................................................................
3-27/6
3-230
2-14
Back to Top
