BENDIX AD-9 Service Data
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BENDIX AD-9 Service Data

(integrated puraguard coalescing) air dryers
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®
®
®
Bendix
AD-9
and AD-9
EXTENDED
PURGE
CONTROL
PORT
DELIVERY PORT
FIGURE 1 - BENDIX
®
AD-9
DESCRIPTION
The function of the Bendix
®
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.
®
IPC (Integrated PuraGuard
WIRING HARNESS
CONNECTION
CHECK
VALVE
ASSEMBLY
®
AND AD-9
®
IPC AIR DRYER MODELS
®
AD-9
®
and AD-9
®
IPC Integrated
IPC AIR DRYER LABEL
OUTER
SHELL
END COVER
SUPPLY
PORT
PURGE VALVE
SAFETY VALVE
END COVER
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
®
Coalescing) Air Dryers
STANDARD
1

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Summary of Contents for BENDIX AD-9

  • Page 1 FIGURE 1 - BENDIX ® AD-9 ® AND AD-9 ® IPC AIR DRYER MODELS DESCRIPTION The Bendix AD-9 and AD-9 IPC Integrated PuraGuard Coalescing air dryers consists of a desiccant cartridge The function of the Bendix ® AD-9 ® and AD-9 ®...
  • Page 2 “cycles”, during operation: the charge AD-9 air dryer. The AD-9 IPC air dryer has all the same cycle and the purge cycle. The following description of functions of the standard AD-9 air dryer, and is used operation is separated into these “cycles”...
  • Page 3 PISTON EXHAUST ELEMENT ® ® ® FIGURE 3 - BENDIX AD-9 AND AD-9 IPC AIR DRYER PURGE CYCLE changes several times, reducing the temperature, causing The air dryer will remain in the charge cycle until air brake contaminants to condense and drop to the bottom, or sump, system pressure builds to the governor cut-out setting.

  • Page 4: Preventive Maintenance

    Bendix dryer inlet port is restricted from entering the air dryer. While AD-9 or AD-9 IPC air dryer to fl ow through the desiccant the turbo cut-off effectively prevents loss of turbocharger drying bed.
  • Page 5 Under these conditions, the presence of small amounts of moisture is normal ® water or oil in downstream reservoirs indicate an AD-9 and should not be considered as an indication that IPC air dryer desiccant cartridge may need to be replaced.
  • Page 6 OPERATION & LEAKAGE TESTS 2. Check for excessive leakage around the purge valve. With the compressor in loaded mode (compressing 1. Test the outlet port check valve assembly by building air), apply a soap solution to the purge valve housing the air system to governor cut-out and observing a test assembly exhaust port and observe that leakage does air gauge installed in the #1 reservoir.
  • Page 7 ® maintenance kit listing in this manual or the Bendix Quick 6. Check the operation of the end cover heater and Reference Catalog (BW1114) for complete kit information.

  • Page 8: Maintenance Kits

    MAINTENANCE KITS Service New (S) Kit Part or Reman Purge Connector Number Exchange (RX) Valve Type Heater Color Kit Description Illustration Complete Mounting Bracket Kit - Contains the 107695 – – – upper and lower brackets as well as the necessary mounting hardware.

  • Page 9: Mounting Bracket Kit

    ADJUSTING NUT SLEEVE MOUNTING MOUNTING STRAP STRAP ISOLATOR 5/16" HEX HEAD SCREW MOUNTING SADDLE UPPER BRACKET LOCKNUT SPECIAL LOCKNUT WASHER SPECIAL LOWER WASHER O-RING MOUNTING BRACKET LOWER CHECK MOUNTING SPECIAL VALVE BRACKET WASHER SPECIAL WASHER 3/8" END COVER CAP 3/8" END COVER SCREW CAP SCREW CHECK VALVE...

  • Page 10: Exhaust Cover

    GASKET GASKET EXHAUST COVER EXHAUST ADAPTER COVER SCREWS ADAPTER EXHAUST COVER SCREWS ADAPTER SILENCER BODY DESICCANT SILENCER CARTRIDGE FILTER SILENCER COVER DESICCANT CARTRIDGE EXHAUST O-RING COVER OUTER EXHAUST HOUSING COVER SCREWS O-RING SILENCER KIT DESICCANT CARTRIDGE KIT SMALL O-RING MEDIUM O-RING LARGE O-RING...
  • Page 11 Figures 7, 8 and 9 during disassembly. delivery check valve assembly and o-ring. Remove the o-ring from the check valve assembly. ® Caution: While performing service on the AD-9 Horizontal Delivery Check Valve Removal – Remove AD-9 ® IPC air dryers, it is not recommended that a the delivery check valve plug from the air dryer end clamping device (vise, C-clamp, etc.) be used to hold...
  • Page 12 Refer to Figure 8, illustration J. identify the style of silencer before attempting to remove 2. Purge Valve Disassembly: it. There are two different styles of silencers that have been used with the Bendix ® AD-9 ® air dryer. One design Note: In some cases a fl...

  • Page 13: Cleaning And Inspection

    (WITH 90° FITTING) (WITH 90° FITTING) MAKEUP AIR LINE ® ® FIGURE 11 - BENDIX AD-9 DROP IN AIR DRYER Heater and Thermostat Assembly Removal 4. Place a strap or chain wrench around the desiccant cartridge so that it is approximately 2–3 inches 1.
  • Page 14 The horizontal delivery check valve while earlier styles instructions provided with these parts and kits should be contained a vertical design. Identify the style of AD-9 ® followed in lieu of the instructions presented here. Refer air dryer end cover and proceed to the appropriate step to Figures 7, 8 and 9 during assembly.

  • Page 15: Installation

    Take care that the replacement adapter and adequate length of the cap screws. and attached fi tting is in the same approximate position as the original. See Figure 11. INSTALLATION 1. Install the assembled Bendix ® AD-9 ® or AD-9 ®...
  • Page 16 ® ® RETROFITTING THE BENDIX AD-9 assure proper operation and service life. Consult your local DRYER authorized Bendix parts outlet or sales representative for additional information. GENERAL ® ® ® 1. Charge Cycle Time - The Bendix...

  • Page 17: Vehicle Preparation

    2. Purge Cycle Time - During normal vehicle operation, 3. Do not locate the AD-9 or AD-9 IPC air dryer near heat the air compressor must remain unloaded for a producing components, such as the vehicle exhaust, minimum of 20 seconds for the standard air dryer and make certain adequate clearance from moving or 30 seconds for the extended purge model.

  • Page 18: Discharge Line

    PURGE EXHAUST LINE air dryer exhaust. 1. If it is necessary to direct AD-9 or AD-9 IPC air dryer 4. It is recommended that the following items be tested for discharge contaminants away from vehicle components...
  • Page 19 ® ® ® Bendix AD-9 AND AD-9 IPC AIR DRYER TROUBLESHOOTING CHART SYMPTOMS CAUSE REMEDY 1. Dryer is constantly “cycling” A. Excessive system leakage. A. If leakage IS SHOWN on gauges, test for excessive service or purging. Dryer purges IMPORTANT: Note whether air brake system leakage.
  • Page 20 Bendix ® AD-9 ® AND AD-9 ® IPC AIR DRYER TROUBLESHOOTING CHART SYMPTOMS CAUSE REMEDY 1. Dryer is constantly “cycling” A. Excessive system leakage. 1. Test fi ttings, hoses, lines and connections. Apply soap solution or purging. Dryer purges IMPORTANT: Note whether air to detect excessive leakage.
  • Page 21 ECON is not in use with the drop-in version of the air dryer, if so, remove and retest. When installing a Bendix Drop-In air dryer in a system equipped with a Holset E or QE compressor, remove the Holset ECON valve along with its feedback and governor control line.
  • Page 22 fi ttings, connections, lines, chambers or is used to pressurize a tank trailer for purposes of off-loading valves, etc. product. Consult your local authorized Bendix parts outlet or sales representative for additional information.
  • Page 23 17 CFM. It is recommended that when using the AD-9 or AD-9 IPC air dryer with a compressor which has a rated displacement exceeding 17 CFM that an authorized Bendix parts outlet or Bendix marketing representative be contacted for assistance.
  • Page 24 Test the compressor using the Bendix BASIC ® ™ cup method as described in the Bendix compressor service manual and referred to in Appendix A, Table A, column 5. Replace compressor. If still under warranty, follow normal warranty process.
  • Page 25 ® ® ® Bendix AD-9 AND AD-9 IPC AIR DRYER TROUBLESHOOTING CHART SYMPTOMS CAUSE REMEDY 4. Safety valve on air dryer A. Restriction between air dryer and A. Check to determine if air is reaching supply reservoir. Inspect “popping off” or exhausting supply (fi...
  • Page 26 ® ® ® Bendix AD-9 AND AD-9 IPC AIR DRYER TROUBLESHOOTING CHART SYMPTOMS CAUSE REMEDY 7. Air dryer does not purge or A. Missing, broken, kinked, frozen, A. Inspect control line from governor UNL (unloader) port to control exhaust air.

  • Page 27: Basic ™ Test

    550 and 750 are not covered under warranty. Note: To help prevent discharge line freeze-ups, shorter discharge line lengths or insulation may be required in cold climates. (See Bendix Bulletins compressors, unloader service is TCH-008-021 and TCH-008-022, included in Appendix B, for more information.) recommended every 250,000 miles.
  • Page 28 The troubleshooting procedure presented on the following 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.

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Ad-9 ipc

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