TM 9-2320-273-20
Table 9-1. Compressed Air and Brake System Troubleshooting Procedures (Continued).
MALFUNCTION.
TEST OR INSPECTION.
CORRECTIVE ACTION.
14. BRAKES OVERHEAT:
Step 1.
Check for low reservoir pressure.
If below 80 psi, see Malfunction 1.
Step 2.
Check for damaged or leaking front limiting valve or rear relay valves.
Tighten loose connections or replace defective valve (para 9-24 or 9-25, as
applicable).
Step 3.
Pull hub and drum assembly (para 10-13 through 10-15 as applicable) and inspect
brake assembly. Apply brakes lightly and observe shoe movement for smooth
operation.
a.
Replace weak or broken return springs (para 9-31 and 9-32 for front
brakes, 9-33 and 9-34 for rear brakes).
b.
Clean, service, and assemble brake mechanism.
Step 4.
Check for insufficient lining to drum clearance (para 9-31 and 9-32 for front brakes,
para 9-33 and 9-34 for rear brakes).
a.
Adjust.
b.
If adjusting fails, refer problem to Direct Support Maintenance.
Step 5.
Inspect wheel bearings for damage and proper lubrication.
Adjust, lube, or replace bearings (para 10-13 through para 10-15 as applicable).
15. STOP LAMPS DO NOT OPERATE, BRAKES FUNCTION NORMALLY:
Step 1.
Have an assistant step on the brake pedal (with ignition key switch on) and check for
approximately 12 volts dc at both electrical connections on the stoplamp switch.
If voltage is not present on both terminals, replace the double-check valve/stop
lamp switch (para 9-28 or 9-29),
Step 2.
Check for defective wiring or electrical connectors.
Troubleshoot the electrical system (para 5-17).
9-8
