TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 1055 of 1313
VEHICLE REAR BRAKES GRAB OR DRAG - Continued
STEP
1.
ARE REAR BRAKESHOES IN GOOD CONDITION?
a.
Look for evidence of locking, smoke, skid marks and excessive heat on wheel and drum to isolate faulty
service brake.
b.
Remove rear brake dust covers (Volume 3, WP
0424).
T0234DAA
CHAMFER
CHAMFER
Figure 1.
Brake Shoe Assembly.
NOTE
Brake shoe lining depth should be more than 5/16 (7.94mm).
c.
Inspect chamfer on brakeshoe lining for wear.
CONDITION/INDICATION
ARE REAR BRAKESHOES IN GOOD CONDITION?
DECISION
NO - Replace worn brakeshoe linings (Volume 3, WP
0426). Go to Step (7) to verify problem is solved.
YES - Go to Step (2).
TM 9-2320-272-23-1
0122
0122-2
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