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12. Using the lock nut, draw the assembly together to
ap proximately half of the spring's free height. While
slowly turning the cartridge, tap the side of the shell
with a plastic mallet. (See Figure 14.) This allows
the desiccant material to settle properly into place.
Con tinue to tighten the nut, making sure all items are
pro perly aligned. Tighten nut fi rmly using an 11/16"
socket or box wrench. (See Figures 15-1 and 15-2)
REBUILDING THE BENDIX
END COVER ASSEMBLY
To remove the end cover assembly from the air dryer,
follow steps 1-6 under the section of this manual entitled
Removal of Desiccant Cartridge. Before rebuilding the
end cover, clean the exterior thoroughly using a quality
commercial solvent.
DISASSEMBLY
1. Remove and discard the large o-ring around the end
cover.
2. Remove the exhaust elbow and clamp.
3. Remove the cap nut and discard the cap nut o-ring.
4. Place the handle of a large screwdriver in a vise and
secure it.
5. Place the slot in the plunger (cap nut end) over the
blade of the screwdriver, hold it securely and remove
the nut from the plunger using a 1/2" socket wrench.
6. Remove the plunger, spring, and valve. Discard the
valve.
7. Clean and inspect the plunger bore and the valve seat.
8. Remove and discard the three o-rings from the plunger.
Clean the plunger.
Figure 14 – Settling Desiccant
10
®
AD-1
™
AIR DRYER
Figure 15-1 – Securing the Cartridge
Figure 15-2 – Secured Cartridge
NOTE: If during the serviceability checks it was
determined that the heater and thermostat were
defective, use the following procedure. It is not
necessary to replace this assembly each time the purge
valve is rebuilt.
9. Remove the two screws that secure the shield or
thermostat retaining clip to the end cover.
10. Remove the shield or clip and the thermostat and
inspect the bore for corrosion.
11. Remove the square-cut seal ring at the bottom of the
thermostat bore.
12. Remove the screw, retaining clip, o-ring, and the heater
element. Inspect the bore for corrosion and if necessary,
clean it.
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