TM 5-2330-325-14&P
Table 4-3. Unit Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
BRAKES (Continued)
2.
BRAKES GRAB OR BIND.
Step 1.
Inspect brake shoes for damage or excessive wear.
Replace brake shoes in accordance with paragraph 4-47.
Step 2.
Inspect air brake chambers.
Replace air brake chambers in accordance with paragraph 4-53.
3.
BRAKES MAKE EXCESSIVE SQUEALING OR GRINDING NOISE WHEN APPLIED.
Step 1.
Inspect brake drum for wear or damage.
Notify Direct Support Maintenance.
Step 2.
Inspect brake shoes for excessive wear.
Replace brake shoes in accordance with paragraph 4-47.
4.
BRAKES FAIL TO ENGAGE.
Step 1.
Check Control (blue/service) Air Line connection at gladhand.
If no air is flowing from prime mover, problem is with prime mover.
Step 2.
Inspect Control Air Line for damage.
Repair or replace air lines or fittings in accordance with paragraph 4-58.
Step 3.
Inspect spring brake control valve for proper function.
Replace valve in accordance with para 4-51.
Step 4.
Check for proper function of brakes.
Adjust brakes in accordance with paragraph 4-48.
Step 5.
Check brake system hardware for damaged or missing components.
Replace brake system components as necessary.
5.
SLOW BRAKE APPLICATION OR SLOW RELEASE.
Step 1.
Check for restrictions in air lines and hoses.
If air lines or hoses are restricted.
Replace in accordance with paragraph 4-58.
If air lines and hoses are not restricted, proceed to step 2.
Step 2.
Check ECU valve operation.
If ECU valve is defective IAW para. 4-51A,
Replace ECU valve in accordance with paragraph 4-52.
If ECU valve is not defective, proceed to step 3.
