Bendix Commercial Vehicle Systems AD-SP SYSTEM PURGE AIR DRYER 10/04 - Manual (Page 17)

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3. The wire harness—available in the Wire Harness and
Splice Kit from authorized Bendix ® parts outlets —is not
included with the service replacement air dryer. When
using this kit, if it becomes necessary to lengthen the
harness, use only 14 gauge wire. When splicing wires,
ensure all wire splices are waterproofed.
4. Tie wrap or support all electrical wires leading to the
Bendix ® AD-IP ® air dryer at 6–8 inch intervals.
Note: Wires should have sufficient slack and not be
completely taught.
TESTING THE BENDIX ® AD-IP ® 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 air dryer purges with an audible escape of air.
3. “Fan” 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-IP air dryer exhaust.
4. It is recommended that the following items be tested
for leakage to ensure that the AD-IP air dryer will not
cycle excessively.
(A) Total air system leakage (See Bendix publication
BW5057 “Air Brake Handbook.”)
(B) Compressor unloader mechanism.
(C) Governor.
(D) Drain cock and safety valve in first (supply)
reservoir.
(E) All air connections leading to and from the first
(supply) reservoir.
(F) Delivery check valve.