BENDIX SD-08-2414 manual Tests Common to More than ONE Complaint, Log-on and Learn from the Best

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TESTS COMMON TO MORE THAN ONE COMPLAINT

1. Discharge plugged or restricted

Connect a temporary discharge line from the compressor discharge port to the supply reservoir and re-check the build-up. If the system build-up is OK then replace the plugged discharge line. If the build-up is NOT OK, go to next cause.

2.Air pressure trapped between the governor and the compressor

Verify the safety valve operation, then remove or disconnect the governor from the compressor and check build-up.

If the build-up is OK, repair or replace the governor or the line between the governor and the compressor.

If the build-up is NOT OK, repair or replace the compressor.

3. Blow Leakage at the Air Dryer Exhaust

Drain all air from the supply reservoir then remove the control air line from the air dryer, plug the line and plug the control port in the air dryer. Re-check build-up.

If the build-up is OK, repair or replace the governor or the line between the governor and the air dryer.

If the build-up is NOT OK, and the temperature is below 32° F, turn the ignition ON and allow the heater to warm the air dryer then check the system build-up. If NOT OK, remove the wire (connector or terminal) from the air dryer. Using a test light, check the wire end, or terminal, for battery voltage with the vehicle ignition ON. If the voltage is OK, repair or replace the air dryer heater and thermostat. If the voltage is NOT OK, repair or replace the vehicle wire connected to the air dryer. Retest build-up.

If build-up is still NOT OK, or if the temperature is above 32° F, replace the air dryer purge valve assembly.

4. Air system leakage

Build the system pressure to governor cut-out, wait two (2) minutes for the air dryer purge completion. Note the pressure on the dash gauges then watch the dash gauges for two (2) minutes. The leakage is not to exceed 2 psi in two (2) minutes for truck bus or tractor (no trailer).

If the leakage is NOT OK on the gauges, find the leak(s) in service and park system and repair. Retest and if the system purge air dryer is in use and still not OK, repair or replace the dryer.

If the leakage is OK on the gauges, drain the air from the supply reservoir, remove the drain cock and install an air gauge. Build the system air in the supply reservoir and note the leakage. If OK, continue checking. If NOT OK, find the leaks and repair.

5. Discharge line leakage

Apply a soap solution to the cover on the flexible discharge line, if leakage is noted, replace the line.

Soap fittings to check for leakage and tighten as needed.

IMPORTANT: The Complaints, Causes and Remedies presented here should not be considered as the only situations possible. They are only meant to represent the most commonly encountered situations. It may be necessary to perform additional troubleshooting using the more detailed information presented in service manuals for the specific components.

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SD-08-2414 © 2014 Bendix Commercial Vehicle Systems LLC, a member of Knorr-Bremse Group • 9/2014 • All rights reserved.

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Contents SD-08-2414 General Safety Guidelines To Avoid Personal Injury or DeathDryer Troubleshooting Chart at the end of the manual DescriptionOperation GeneralCharge Cycle Refer to Figure Purge Cycle Refer to Figure Bendix AD-IPINTEGRAL Purge AIR Dryer Purge CycleTurbo CUT-OFF Feature Refer to Figure Bendix AD-IPAIR Dryer Sectional ViewPreventive Maintenance Discharge Line Unloader Refer to FigureRebuilding the Bendix AD-IPAIR Dryer Operation & Leakage TestsBendix AD-IP AIR Dryer Removal Bendix AD-IPAIR Dryer Heater Thermostat Connector 23 24 Description Qty Reference FigureDisassembly Bendix AD-IPAIR Dryer Cable Bracket InstallationCleaning & Inspection AssemblyRetrofitting the AD-IP AIR Dryer Bendix AD-IPAIR Dryer InstallationTotal Vehicle Reservoir Volume Requirement Vehicle Application RequirementsMounting the AD-IP AIR Dryer Vehicle PreparationLocating Bendix AD-IPAIR Dryer on the Vehicle Refer to FigureCompressor Discharge Line Connecting the AIR LinesWiring the Heater & Thermostat Refer to Figure Purge Exhaust LineTesting the Bendix AD-IPAIR Dryer Symptoms Cause Remedy Perform tests 1 to 6 in the order presentedBendix AD-IPAIR Dryer Troubleshooting Chart Bendix AD-IPAIR Dryer Troubleshooting Chart Air compressor must remain unloaded for a Minimum of 30 seconds. This minimum purgeIs not covered under the warranty Bulletins TCH-008-021 and TCH-008-022. ShorterColumn Refer to Appendix A, Table a columns 3 & 4 forPreventative Maintenance Section Leakage. Refer to Technical Bulletin TCH-008-040See Causes and Remedies for Symptoms 1, 2 Refer to Remedy C, Symptom #1Low Air Use High Air UseType E & QE Integral Purge AIR DryerHolset CompressorComplaint Air System Builds Too Slow Complaints Common to the Charging & AIR Supply SystemComplaint Can Not Build System Pressure Complaint Can Not Build System Pressure Above X psiComplaint System Pressure Goes to 150+ psi Tests Common to More than ONE Complaint Log-on and Learn from the Best