Table 2-2. Unit Troubleshooting-continued
TEST OR INSPECTION
AIRBRAKE SYSTEM (Models WPES-10 and H-9518-1) - continued.
If air chamber assembly is leaking air, replace air chamber assembly. Refer to Paragraph 2-89.
If airbrake relay valve is leaking air, notify Direct Support Maintenance.
Loosen tube ritting on air cleaner, leading to airbrake relay valve. Check for leaking high-pressure air.
If high-pressure air is leaking, tighten fitting and goto step 3.
If air leaks slowly or not at all repair or service brake line air cleaner. Refer to Paragraph 2-84.
Tell assistant to pump towing vehicle brake pedal several times while you are watching air chamber action
on all four brakes.
If all air chambers assemblies operate, go to step 4.
If some, but not all air chamber assemblies pushrods fail to operate, replace defective air chambers.
Refer to Paragraph 2-89.
If all air chamber assembly pushrods do not operate or operate slowly, replace airbrake relay valve.
Refer to Paragraph 2-85.
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