TM10-3930-660-34 Table 2-1.  Direct Support and General Support Troubleshooting Table (Cont’d) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION BRAKING SYSTEM 16. BRAKES WON’T RELEASE Step 1. Check brake valve for ball valve damage. Repair brake valve, para. 10-4. Step 2. Check for binding piston in brake valve. Repair brake valve, para. 10-4. 17. INSUFFICIENT BRAKES Step 1. Check pressure regulating spring in brake valve for damage. Repair brake valve, para. 10-4. Step 2. Check boot on brake valve for cuts. Repair brake valve, para. 10-4. 18. BRAKES WILL NOT RELEASE COMPLETELY Check piston in brake valve for sticking. Repair brake valve, para. 10-4. 19. EXCESSIVE BRAKING Check for quantity of shims in brake valve. Repair brake valve, para. 10-4. 20. BRAKE ACCUMULATOR CHARGING CYCLE REPEATS  FREQUENTLY WHEN  BRAKES ARE NOT BEING USED Step 1. Check brake valve poppet for leakage. Repair brake valve, para. 10-4. Step 2. Check brake valve seals and O-rings for leakage. Repair brake valve, para. 10-4. Step 3. Check seating of ball valve in brake valve. Repair brake valve, para. 10-4. 2-11