BENDIX AD-2 Service Data

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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