Testing the Everflow Assembly AIR Dryers

GOVERNOR GASKET	GOVERNOR
GOVERNOR GASKET	(NON-ADJUSTABLE,
(SPECIAL GASKET,	130 PSI CUT-OUT)
SEE NOTE 6)

SMALL

O-RINGCHECK VALVEBOLTS BODY

SPRING

LARGE

O-RING ADAPTER

FIGURE 6 - AD-IS®AIR DRYER DELIVERY CHECK VALVE

ASSEMBLY

1.Lubricate the smaller o-ring and check valve body with barium or silicon grease.

2.Install this o-ring on the check valve body by sliding the o-ring over the set of 4 tapered guide lands. The o-ring groove holds the o-ring in its correct location.

3.At the other end of the check valve body, the spring is installed over the set of 4 straight guide lands. When the spring has been pushed to the correct location, the check valve body is designed to hold the end of the spring in position - be sure that the spring is not loose before continuing with this installation.

4.Install the assembled check valve body/o-ring/spring in the delivery port so that the o-ring rests on its seat and the free end of the spring is visible.

5.Grease the adapter and the remaining larger o-ring and install it onto the ﬁtting.

6.Position gasket, insert bolts through the governor and tighten (to 125 in-lbs). (Note: Do not replace with a standard compressor/governor gasket.)

7.Reattach line to the governor.

8.Before placing vehicle back into service, check to see that the system pressure now builds to full operational pressure.

TESTING THE EVERFLOW™ ASSEMBLY AIR DRYERS

Before placing the vehicle in service, perform the following tests.

1.Close all reservoir drain valves.

2.Build up system pressure to governor cut-out and note that one of the AD-IS®EverFlow™ Assembly air dryers purges with an audible burst of air, followed immediately by approximately 30 seconds of air ﬂowing out of the purge valve.

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 other AD-IS®EverFlow™ assembly air dryer exhaust.

4.It is recommended that the total air system be tested for leakage to assure that the AD-IS®EverFlow™ assembly air dryers will not cycle excessively.

See Bendix publication BW5057 “Air Brake Handbook.”