Monaco 2002 Diplomat, Service Manual

Page: 268 / 324

Air Dryer Components:
1. Purge Valve:
A valve located on the bottom of the air
dryer base that remains open during a compressor unload
cycle. The purge valve allows collected moisture,
condensation and contamination to be expelled from the
air dryer during a purge cycle.
2. Pressure Relief Valve: A valve that protects the air dryer
from over-pressurization.
3. Regeneration Valve: The valve that controls regeneration
of the desiccant. The regeneration valve allows air from
the supply and secondary tanks to bypass the outlet
check valve. The air expands and backflushes moisture
off the desiccant through the dryer's purge valve.
In extreme cold, make sure the air dryer heater is in good working order.
The heater in the air dryer is a 100-watt heater controlled by ignition power
and turned off when the ignition is switched off. Thermostat operating range
is on below 45° F and off when the temp is above 86° F. The fuse is located
in the front electric bay outside, beneath the driver window.
WARNING: Remove all pressure from the air system
before disconnecting any component, including the desic-
cant cartridge. Pressurized air can cause serious personal
injury.
1. Replacement kit contains one cartridge and one O-ring.
2. Loosen and remove the old cartridge. Use strap wrench, if necessary.
3. Remove and discard the O-ring from the dryer base.
4. Inspect and clean the seal seat. Repair any minor damage.
NOTE: If the seats are damaged so badly that a tight seal
cannot be maintained, replace the air dryer.
5. Lubricate the O-Ring on the stem with a thin layer of grease.
6. Lubricate the cartridge seal with a thin layer of grease.
7. Thread the replacement cartridge onto the base until the seal touches
the base. Tighten the cartridge ONE additional turn. DO NOT
OVERTIGHTEN.
Chassis Information
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D I P L O M A T
1 0 • 2 6 8
Desiccant Cartridge
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