TM10-4610-240-24
TM 08580C-24/2
TO 40W4-13-22
Table 2-2. Unit Troubleshooting -continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIRBRAKE SYSTEM (Model WPES-1) - continued
4. TRAILER ROLLS WHEN DISCONNECTED FROM TOWING VEHICLE.
Step 1. Check all compressed air system tubes, fittings, and components for leaking air.
a. If compressed air system is not losing pressure, go to step 2.
b. If compressed air tube or fitting is leaking air, replace airbrake system tubing. Refer to paragraph 2-96.
c. If coupling half is leaking air, replace airbrake hose assembly. Refer to paragraph 2-96.
d. If brake line air cleaner is leaking air, replace brake line air cleaner. Refer to paragraph 2-97.
e. If reservoir is leaking air, replace reservoir. Refer to paragraph 2-96.
f. If reservoir drain cock is leaking air, replace reservoir drain cock. Refer to paragraph 2-96.
g. If air chamber assembly is leaking air, replace air chamber assembly. Refer to paragraph 2-96.
h. If airbrake relay valve is leaking air, replace airbrake relay valve. Refer to paragraph 2-98.
2-62
