BRAKES TROUBLESHOOTING AND MAINTENANCE PROCEDURES.
TEST OR INSPECTION
COMPRESSOR LEAKS COOLANT.
Step 1. Check for improperly tightened coolant line fittings and plugs. Do not over-torque fittings or plugs which
can crack the head or block.
Tighten fittings and plugs to standard torques as necessary.
Check for freeze cracks due to improper anti-freeze strength.
Test and strengthen anti-freeze solution as necessary. Refer to TM 5-3805-261-20.
PARKING BRAKE NOT ENGAGING CORRECTLY.
Step 1. Check adjustment of parking brake air control valve.
Adjust control valve, if necessary. Refer to paragraph 6-5.
Step 2. Check for wear or damage to control valve.
If control valve is worn or damaged--replace. Refer to paragraph 6-5.
Step 3. Check for mud or dirt clogging exhaust port of quick release valve.
If quick release valve is dirty--clean. Refer to paragraph 6-4.
Step 4. Check for worn or damaged parking brake actuator.
If parking brake actuator is worn or damaged--repair. Refer to paragraph 6-4.
Step 5. Check that adjustment of rod end on parking brake actuator does not permit too much free movement of
lever on transmission.
If rod end is not adjusted correctly--adjust. Refer to paragraph 6-12. Repair parking brake after
completing steps 1 thru 5, if necessary.