TM 5-3805-261-34
BRAKES TROUBLESHOOTING AND MAINTENANCE PROCEDURES. (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
i.
PARKING BRAKE NOT RELEASING CORRECTLY.
Step 1.
Check for air pressure at supply port of control valve.
If no air pressure at supply port--troubleshoot air system.
Step 2.
Check clearance adjustment of control valve.
Adjust control valve, if necessary. Refer to paragraph 6-5.
Step 3.
Check for wear or damage to control valve.
If control valve is worn or damaged--replace. Refer to paragraph 6-5.
Step 4.
Check for wear or damage to quick release valve.
If quick release valve worn or damaged--repair. Refer to paragraph 6-4.
Step 5.
Check for worn or damaged parking brake actuator.
If parking brake actuator is worn or damaged--repair. Refer to paragraph 6-4.
Step 6.
Check adjustment of rod end on parking brake actuator to ensure that with the brake off, a small
amount of free travel of lever on transmission is permitted.
If no free travel is permitted--adjust rod end. Refer to paragraph 6-4. Repair parking brake after completing
steps 1 thru 6, if necessary.
j.
SERVICE BRAKES NOT ENGAGING CORRECTLY.
Step 1.
Check for air pressure at supply ports of control valve.
If no air pressure at supply ports--troubleshoot air system.
Step 2.
Check adjustment of pedal stop to ensure it permits enough travel of brake pedal to operate
brakes.
If not enough travel is permitted--adjust pedal. Refer to paragraph 6-8.
6-8
