TM 10-4610-239-24
TM 08580B-24/3
Table 2-2. Unit Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
AIRBRAKE SYSTEM - Continued
2. ONE BRAKE DRAGS - Continued
Step 4.
Tell assistant to hold down towing vehicle brake pedal. Loosen uppermost hose fitting
on slow returning air chamber.
If air chamber assembly pushrod returns slowly, go to step 5.
If air chamber assembly pushrod returns quickly, tighten hose fitting and repair
airbrake relay valve. Refer to paragraph 2-58.
Step 5.
Disconnect clevis from slack adjuster and do step 4.
If air chamber assembly pushrod returns quickly, tighten hose fitting and go to step 6.
If air chamber assembly pushrod returns slowly, replace defective air chamber
assembly. Refer to paragraph 2-70.
Step 6.
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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