TM 9-2330-287-14&P
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
BRAKE SYSTEM
3. BRAKES WILL NOT RELEASE.
NOTE
If only one wheel brake will not release, proceed to step 4.
Check emergency relay valve for proper operation.
Step 1.
WARNING
Before performing any maintenance on brake system, disconnect air supply to trailer
and drain trailer air reservoir. Failure to do so could result in serious injury.
Replace relay valve as required (page 4-68).
Check airbrake chamber for insufficient push rod travel.
Step 2.
Adjust service brake as required (page 4-50).
Check service airhose and lines for obstructions.
Step 3.
Remove hose and lines to clear obstructions as required (page 4-62).
Check handbrake cable for binding.
Step 4.
Replace as required (page 4-42).
Check for separation of brakeshoe and lining.
Step 5.
Replace as required (page 4-46).
4. WEAK OR NO BRAKES.
Check fluid level in master cylinder.
Step 1.
Fill to proper level as required and bleed brakes (page 4-51).
Step 2.
Check emergency relay valve for proper operation.
