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5. Thoroughly lubricate the two new o-rings and install

them in their respective grooves in the purge plate.

(See Figure 6.)

6. Set the desiccant sealing plate aside for reinstallation

on the desiccant cartridge.

REINSTALLING THE DESICCANT CARTRIDGE IN

THE AIR DRYER

If the desiccant cartridge is to be replaced as an assembly

rather than rebuilt (see the desiccant cartridge rebuilding

instructions), remove the cartridge from the air dryer.

The current revision replacement desiccant cartridge is

shown in Figure 7. All prior revisions of the cartridge will

interchange with no modiﬁ cations to either air dryer.

Prior to installing the new replacement cartridge in the air

dryer, the following steps must be followed:

1. Carefully remove the lock nut from the cartridge bolt

using an 11/16 inch open end or box wrench.

IMPORTANT

Care must be taken not to allow the cartridge bolt to slip

out of the cartridge when the lock nut is removed. Loss

of desiccant material will occur should this happen.

2. Install the previously rebuilt desiccant sealing plate on

the cartridge bolt so that the ball check retaining clip

remains visible. (See Figure 15-1 & 15-2.)

3. While holding the cartridge bolt, reinstall the lock nut on

the cartridge bolt.

IMPORTANT

Before tightening the lock nut down, make certain that

the shoulder (the unthreaded portion) of the cartridge

bolt extends slightly above the perforated desiccant

plate. (See Figure 12.)

4. By tightening the lock nut, draw the desiccant sealing

plate down into the desiccant cartridge until the shoulder

of the desiccant sealing plate is against the cartridge

shell. (See Figure 15.)

Figure 8 – Desiccant Cartridge Assembly

Figure 9 – Oil Separator

REBUILDING THE DESICCANT CARTRIDGE

IMPORTANT

Only the current revision desiccant cartridges can be

rebuilt. (See Figure 7.) Current revision desiccant cartridges

are identiﬁ ed positively by the Bendix trademark BW

stamped in the hex head of the cartridge bolt, and by

"AD-2" displayed on the bottom face of the oil ﬁ lter. If an

old revision desiccant cartridge is removed from the

air dryer, it should be replaced with a complete current

revision desiccant cartridge.

Figure 10 – Cartridge Bolt Installation