BENDIX AD-1 Service Data

® ™
Bendix AD-1 and AD-2
BENDIX
Figure 1 – Bendix ® AD-1
DESCRIPTION
The air dryer collects and removes moisture and
contaminants before the air reaches the fi rst reservoir. It is
distinctly different than a reservoir drain valve or aftercooler
in that it provides "dry air" for the air brake system. The daily
draining of the system's reservoirs is no longer necessary,
thus reducing maintenance considerably when compared
to an air brake system without an air dryer.
In a system without an air dryer, the life of air brake
components is substantially reduced because of contact
with water and oil in the system, and – since the air dryer
removes water and oil in vapor form – life of the component
devices is substantially increased when the air dryer is
used.
®
Air Dryers
® AD-1 ™ AIR DRYER
™ and AD-2 ® Air Dryers
BENDIX
The air dryer can be used on most highway vehicles where
normal compressor loaded time is 90 seconds or less and
unloaded time is 30 seconds or more. If the com pressor
remains loaded for long periods of time, such as on a transit
bus, certain changes in the purge volume of the dryer
must be made. For more information regarding in crease
of the purge volume, contact the Bendix TechTeam at
1-800-AIR-BRAKE (1-800-247-2725).
The air dryer is installed in the discharge line between
the compressor and the fi rst reservoir. The unit must be
mounted vertically and mounting brackets – which can be
adjusted to meet installation requirements – are provided.
® ®
AD-2 AIR DRYER
1