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Technical Bulletin

Bulletin No.: PRO-08-12 Effective Date: 5/31/94 Cancels: PRO-08-12 dated 3/1/91 Page: 1 of 5

Subject: Air Dryer Installations – European Vehicles W/

Compressor Discharge Line Unloader System

Attachments: Schematics for AD-2, AD-4 & AD-9

THIS BULLETIN CONTAINS REVISED INFORMATION AND SUPERSEDES ALL

PREVIOUS BULLETINS ON THE SAME SUBJECT!

The Bendix AD-2, AD-4, and AD-9 DLU (Discharge Line Unloader) Air Dryers CAN be

installed on European and other overseas vehicles that utilize a Discharge Line

Unloader Valve instead of the domestic type Governor and compressor Unloader

mechanism.

IMPORTANT

AD-2 Any AD-2 Air Dryer part number may be used in the attached AD-2 installation

schematic.

AD-4 Any AD-4 Air Dryer part number may be used in the attached AD-4 installation

schematic.

AD-9 Only part numbers 065499 (12v heater) and 065605 (24v heater) may be used in

the attached AD-9 DLU installation schematic. These part numbers were

released in 1994 for this specific purpose. Only these AD-9 DLU part numbers

may be used for this installation. They are identified with the letter “U” embossed

in the metal on the flat area next to the heater and thermostat connector and with

a metal identification tag installed under one of the end cover nuts.

1 2 3 4 5

Technical BulletinBulletin No.: PRO-08-12 Effective Date: 5/31/94 Cancels: PRO-08-12 dated 3/1/91 Page: 1 of 5Subject: Air Dryer Installations – Euro

The discharge line unloader valve which is generally located just ahead of the firstreservoir (the “wet tank”), must be removed. An air dryer and D-2

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BENDIX TCH-008-012 Manual de usuario