TM9-2330-207-14
Table 4-3. Organizational Troubleshooting Table - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. NO BRAKES OR WEAK BRAKES (Cont).
Step 9. Check for worn/worn out brake lining.
If brake lining is not worn, proceed to step 10.
If air chamber is leaking, tighten connections.
If air chamber is not defective, proceed to step 11.
Step 11. Check for leaking brake wheel cylinder (all models except M127).
If brake wheel cylinder is leaking, replace (para. 4-40a(4).
If brake wheel cylinder not defective, proceed to step 12.
Step 12. Check for defective or ineffective hydraulic master cylinder or air chamber (para. 4-39f).
Replace defective master cylinder (all models except M127) or air chamber.
If master cylinder or air chamber not defective, proceed to step 13.
Step 13. Visually check for broken or frozen camshaft follower roller (model M127).
If camshaft follower roller is broken or frozen, notify Direct Support maintenance.
3. SLOW BRAKE APPLICATION OR RELEASE.
Step 1. Check for low air pressure indication on air pressure gage in towing vehicle.
Check air lines/connectors for restrictions and/or leakage.
Tighten connections; remove any restrictions from hoses and repair or replace
as necessary.
If air pressure gage indicates normal, proceed to step 2.
If emergency relay valve is defective, replace valve (para. 4-47).
If emergency relay valve is not defective, proceed to step 3.
Step 3. Check for weak or broken brake shoe tension spring (para. 4-40).
If spring is not defective, proceed to step 4.
Step 4. Check for air in hydraulic brake system (all models except M127).
If no air in hydraulic brake system, proceed to step 5.
If air chamber is defective, replace air chamber (para. 4-41 or 4-46).
If air chamber is not defective, proceed to step 6.