User's Manual

TESTING THE BENDIX

AD-RP

™

AIR DRYER

Before placing the vehicle in service, perform the following

tests:

1. Close all reservoir drain cocks.

2. Build up system pressure to governor cut-out and

note that the Bendix

AD-RP

™

air dryer purges with an

audible escape of air.

3. Apply and release the service brakes to reduce system

air pressure to governor cut-in. Note that the system

once again builds to full pressure and is followed by a

purge at the AD-RP air dryer exhaust.

4. It is recommended that the following items be tested

for leakage to ensure that the AD-RP air dryer will not

cycle excessively.

(A) Total air system leakage (See Bendix publication

BW5057 "Air Brake Handbook.")

(B) Compressor unloader mechanism

(D) Drain cock and safety valve in the • rst (supply)

reservoir

(E) All air connections leading to and from the • rst

(supply) reservoir; and the

(F) Delivery check valve.