Table 4-2. Troubleshooting-Continued
TEST OR INSPECTION
If main bearings are worn, replace bearings (para. 12-10).
Check all airlines and connections for leaks.
If leaks are detected, repair or replace airlines of fittings.
If no leaks are detected, proceed to step 2.
Check for defective brake chamber.
If brake chamber is not defective, proceed to step 3.
Check for defective relay valve.
If relay valve is not defective, proceed to step 4.
Check for defective brake shoes, or grease or oil on brake
If brake shoes are not defective or oily, check air lines for leaks
and repair as needed.
Check for out of round brake drums.
If brake drum is out of round, turn or replace brake drum (para.
If brake drum is not out of round, replace brake shoes.