Assembly

ORIGINAL STYLE

CHECK VALVE AND

SPRING

Early models include a different style check valve and spring

GOVERNOR GASKET

(SPECIAL GASKET,

SEE NOTE 6 ON

PREVIOUS PAGE)GOVERNOR (NON-ADJUSTABLE,

130 PSI CUT-OUT)

SMALL
O-RING	CHECK VALVE	BOLTS
		BOLTS

	BODY

SPRING

LARGE

O-RING ADAPTER

FIGURE 7 - AD-IS®AIR DRYER DELIVERY CHECK VALVE

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.