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Air Dryer Troubleshooting

 

AD-9 Troubleshooting

The troubleshooting procedure presented on the below pages has been excerpted from a troubleshooting card entitled: Troubleshooting Charging and Air Supply Systems. The complete card can be obtained from authorized Bendix parts outlets under literature number BW1779. It is presented here because of the air dryers connection to the supply air system and for convenience. The procedure is not all inclusive but rather represents the most commonly encountered complaints.

Troubleshooting Air Dryer

Air Dryer Assembly

Air Dryer assembly

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

Troubleshooting Air Dryer

TESTING THE AD-9™ AIR DRYER

Before placing the vehicle in service, perform the following tests:

1. Close all reservoir drain cocks.

2. Build up system pressure to governor cut-out and note that the AD-9™ air dryer purges with an audible escape of air.

3. “Fan” the service brakes to reduce system air pressure to governor cut-in. Note that the system once again builds to full pressure and is followed by a purge at the AD-9™ air dryer exhaust.

4. It is recommended that the following items be tested for leakage to assure that the AD-9™ air dryer will not cycle excessively.

(A) Total air system leakage (See Bendix publication BW-5057 “Air Brake Handbook”).

(B) Compressor unloader mechanism.

(C) Governor.

(D) Drain cock and safety valve in first (supply) reservoir.

(E) All air connections leading to and from the first (supply) reservoir.

Haldex Pure Air Plus Air Dryer Troubleshooting Guide

L20043 Rev. 12/99

Haldex Air Dryer Troubleshooting

Trouble

Haldex Pure Air Plus Air Dryer Troubleshooting Guide

Haldex Pure Air Plus Air Dryer Troubleshooting Guide

 

SERVICE KITS

DQ6020 Major Repair Kit (Includes Purge, Turbo Saver and One-Way Check Valve Assemblies.)

DQ6032 Coalescing Filter Kit

DQ6026 Desiccant Kit (Includes Desiccant Cartridge, Coalescing Filter, Heater Cover and Relief Valve.)

DQ6011 12-Volt Heater Kit (For dryers date coded prior to 9-97)

DQ6012 24-Volt Heater Kit (For dryers date coded prior to 9-97)

DQ6013 12-Volt Heater Kit (For dryers date coded after 8-97)

DQ6014 24-Volt Heater Kit (For dryers date coded after 8-97)

DQ6023 Shield Kit

DQ6024 Clamp Band Kit

KN31527 Relief Valve

© Barry Brideau 2003-2014