Troubleshooting guide

13
For more information, visit www.bendix.com or www.foundationbrakes.com • 1-800-AIR-BRAKE (1-800-247-2725)
Bendix
®
AD-IS
®
Air Dryer
Governor
Air Dryers
The air dryer is an in-line fi ltration system that removes
both water vapor and oil droplets from the compressor
discharge air after it leaves the compressor. This results
in cleaner, drier air being supplied to the air brake system,
and aids in the prevention of air line and component
freeze-ups in winter weather.
As the air passes into the air dryer, most of the oil droplets
are removed by the oil separator. The air then moves
through the desiccant material which removes most of
the water vapor before the compressed air is passed to
the air brake service (supply) reservoir. The oil droplets,
and the water collected, are automatically purged at the
dryer when the governor reaches its “cut-out” setting.
For vehicles with accessories that are sensitive to small
amounts of oil, Bendix
®
PuraGuard
®
oil coalescing
air dryers are used. Similar in appearance to standard
air dryers (with different graphics and an added center
medallion symbol), PuraGuard oil coalescing air dryer
cartridges contain a coalescing media at the inlet of the
desiccant bed that provides a high level of oil removal.
The Charging, Air Treatment and Storage System: Air Dryers
Special Discharge Port
Fitting with Feedback Line
Connection
Feedback
Line
Bendix
®
AD-IP
®
DI Air
Dryer
(“Drop-in”
version)
Bendix
®
AD-2
®
Air Dryer
Bendix
®
AD-9
®
Air Dryer
Bendix
®
AD-9
®
Air Dryer
Cartridge
Integrated
Purge
Reservoir
The Bendix
®
PuraGuard
®
Graphics and
Medallion - Indicates the presence of a
PuraGuard Oil Coalescing Cartridge
Bendix
®
AD-IP
®
Air Dryer
Cartridge
Bendix
®
AD-IS
®
Air Dryer
Module
Air passes through the oil separator
and then the desiccant material.
clean dry air
Bendix
®
AD-9si
™
Air Dryer
Important! When servicing, note that standard
Bendix
®
brand air dryers or air dryer cartridges may
be serviced with Bendix PuraGuard oil coalescing
air dryers or cartridges, however, Bendix PuraGuard
oil coalescing air dryers or cartridges must only be
serviced with like replacements.