TM 5-3805-261-34BRAKES TROUBLESHOOTING AND MAINTENANCE PROCEDURES.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONg.COMPRESSOR LEAKS COOLANT.Step 1. Check for improperly tightened coolant line fittings and plugs. Do not over-torque fittings or plugs whichcan crack the head or block.Tighten fittings and plugs to standard torques as necessary.Step. 2.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.h.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 oflever on transmission.If rod end is not adjusted correctly--adjust. Refer to paragraph 6-12. Repair parking brake aftercompleting steps 1 thru 5, if necessary.6-7
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