BENDIX AD-9 User Manual

1
®
SD-08-2412
Bendix
®
AD-9
®
and AD-9
®
IPC (Integrated PuraGuard
®
Coalescing) Air Dryers
EXTENDED
PURGE
STANDARD
DESCRIPTION
The function of the Bendix
®
AD-9
®
and AD-9
®
IPC Integrated
PuraGuard
®
Coalescing air dryers is to collect and remove
air system contaminants in solid, liquid, and vapor form
before they enter the brake system. They provide clean, dry
air to the components of the brake system which increases
the life of the system and reduces maintenance costs. Daily
manual draining of the reservoirs is eliminated.
The Bendix AD-9 and AD-9 IPC Integrated PuraGuard
Coalescing air dryers consists of a desiccant cartridge
and a die cast aluminum end cover secured to a cylindrical
steel outer shell with eight cap screws and nuts. The end
cover contains a check valve assembly, a safety valve,
three threaded air connections, and the purge valve
housing assembly. The removable purge valve housing
assembly incorporates a purge valve mechanism and a
turbocharger cut-off feature that is designed to prevent loss
OUTER
SHELL
SUPPLY
PORT
WIRING HARNESS
CONNECTION
DELIVERY PORT
CHECK
VALVE
ASSEMBLY
END COVER
CONTROL
PORT
FIGURE 1 - BENDIX
®
AD-9
®
AND AD-9
®
IPC AIR DRYER MODELS
IPC AIR DRYER LABEL
SAFETY VALVE
PURGE VALVE
END COVER

BENDIX AD-9 Specifications

General

Brand	BENDIX
Model	AD-9
Category	Dehumidifier
Language	English

Summary

DESCRIPTION

OPERATION OF THE BENDIX AD-9 AIR DRYER

CHARGE CYCLE

Details the process of charging the air dryer with compressed air.

PURGE CYCLE

Explains the air dryer's purge cycle operation.

TURBO CUT-OFF FEATURE

Describes the turbo cut-off feature to prevent engine air pressure loss.

PREVENTIVE MAINTENANCE

900 HOUR / 25,000 MILE MAINTENANCE

Covers checks for moisture, bolt tightness, and performance tests.

10,800 HOUR / 36 MONTH MAINTENANCE

Covers rebuilding the air dryer and replacing the desiccant cartridge.

GENERAL SAFETY GUIDELINES

OPERATION & LEAKAGE TESTS

REBUILDING THE BENDIX AD-9 AND AD-9 IPC AIR DRYERS

GENERAL

Introduction to rebuilding procedures and available maintenance kits.

AIR DRYER REMOVAL

Provides steps for removing the air dryer from the vehicle.

MAINTENANCE KITS

DISASSEMBLY

DELIVERY CHECK VALVE REMOVAL

Outlines procedures for removing delivery check valves.

VERTICAL DELIVERY CHECK VALVE REMOVAL

Details specific steps for removing vertical delivery check valves.

HORIZONTAL DELIVERY CHECK VALVE REMOVAL

Details specific steps for removing horizontal delivery check valves.

SILENCER REMOVAL

Procedure for removing the silencer component from the air dryer.

PURGE VALVE REMOVAL

Procedure for removing the purge valve assembly.

HEATER AND THERMOSTAT ASSEMBLY REMOVAL

Steps to remove the heater and thermostat assembly.

END COVER REMOVAL

Procedure for removing the air dryer end cover.

DROP IN AIR DRYER MAKEUP LINE REMOVAL

Steps for removing the makeup line on drop-in air dryers.

CLEANING & INSPECTION

ASSEMBLY

PURGE VALVE HOUSING ASSEMBLY

Steps for assembling the purge valve housing.

DELIVERY CHECK VALVE ASSEMBLY

Procedures for assembling delivery check valves.

VERTICAL DELIVERY CHECK VALVE

Specific steps for assembling vertical delivery check valves.

HORIZONTAL DELIVERY CHECK VALVE

Specific steps for assembling horizontal delivery check valves.

INSTALLATION

RETROFITTING THE BENDIX AD-9 AIR DRYER

GENERAL

General information on retrofit instructions.

VEHICLE PREPARATION

Preparation steps before installing the air dryer.

LOCATING THE BENDIX AD-9 AIR DRYER ON VEHICLE

Guidelines for selecting the mounting location for the air dryer.

MOUNTING THE BENDIX AD-9 AND AD-9 IPC AIR DRYER

Steps for mounting the air dryer unit onto the vehicle.

VEHICLE APPLICATION REQUIREMENTS

CHARGE CYCLE TIME

Requirement for compressor recovery time during charge cycle.

PURGE CYCLE TIME

Minimum purge time requirements for the air dryer.

EUROPEAN AIR BRAKE SYSTEMS

Special installation requirements for European air brake systems.

HOLSET E OR QE TYPE AIR COMPRESSORS

Special components needed for Holset compressors.

USE OF STANDARD OR EXTENDED PURGE AD-9 OR AD-9 IPC AIR DRYER

Guidelines for selecting dryer type based on vehicle reservoir volume.

CONNECTING THE AIR LINES

PURGE CONTROL LINE

Instructions for installing the purge control air line.

DISCHARGE LINE

General guidelines for discharge lines.

PURGE EXHAUST LINE

Instructions for directing discharge contaminants away from components.

WIRING THE HEATER/THERMOSTAT

Instructions for connecting heater and thermostat wiring.

TESTING THE BENDIX AD-9 AND AD-9 IPC AIR DRYER

BENDIX AD-9 AND AD-9 IPC AIR DRYER TROUBLESHOOTING CHART

TABLE A: MAINTENANCE SCHEDULE AND USAGE GUIDELINES