TM 5-2330-325-14&P
Table 4-3. Unit Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
SUSPENSION
1.
TRAILER DOES NOT TRACK STRAIGHT BEHIND PRIME MOVER.
Step 1.
Inspect suspension components for damage.
Notify Direct Support Maintenance.
Step 2.
Inspect axle for proper alignment.
Notify Direct Support Maintenance.
BRAKES
1.
BRAKES WILL NOT 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 to see if shutoff valves in towing vehicle are open.
If valves are closed, open shutoff valves.
If valves are open, proceed to step 3.
Step 3.
Check to see if either dump valve is open.
If a dump valve is open, close dump valve.
If both dump valves are closed, proceed to step 4.
Step 4.
Check for intervehicular air hoses for proper connection and damaged or missing
preformed packing.
If hoses are improperly connected, connect them properly. If preformed packing is
missing or damaged, replace packing.
If hoses are properly connected and preformed packing is good, proceed to step 5.
Step 5.
Check ECU valve and brake chamber.
Apply towing vehicle brakes and release. ECU valve should vent brake chamber air
through exhaust port when brakes are released.
If air is not vented from brake chamber, replace ECU valve in accordance with
If ECU valve is not defective but brake chamber is defective, replace brake chamber
in accordance with paragraph 4-53.
If ECU valve and brake chamber are not defective, proceed to step 6.
Step 6.
Check for weak or broken brake shoe return spring.
If return spring is defective, replace spring in accordance with paragraph 4-47.
If return spring is not defective, proceed to step 7.
Step 7.
Check for out-of-adjustment brakes.
Adjust brakes in accordance with paragraph 4-48.
