TM 10-4610-239-24
TM 08580B-24/3
Table 2-2. Unit Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
AIRBRAKE SYSTEM - Continued
1. POOR OR NO BRAKING ACTION - Continued
If brakeshoe linings are greater than 1/8 inch (3.2 mm) thick, adjust service brakes.
Refer to paragraph 2-73.
If brakeshoe linings are less than 1/8 inch (3.2 mm) thick, repair service brake
assembly. Refer to paragraph 2-72.
2. ONE BRAKE DRAGS
Step 1.
Tell assistant to pump towing vehicle brake pedal several times while you are watching
air chamber action on wheel that drags.
If air chamber assembly pushrod moves out and returns quickly as brakes are
engaged and released, go to step 2.
If air chamber assembly pushrod on any wheel returns slowly, go to step 4.
Step 2.
Check brakeshoe adjustment on wheel that drags. Refer to paragraph 2-73.
If brakeshoe adjustment is good, go to step 3.
If brakeshoe adjustment is too tight, adjust brakeshoes. Refer to paragraph 2-73.
Step 3.
Remove hub and drum assembly for wheel that drags (refer to paragraph 2-66) and
check for rusted or damaged brake parts or weak return spring.
Repair service brake assembly. Refer to paragraph 2-72.
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