Bendix® AD-9® AND AD-9® IPC AIR DRYER TROUBLESHOOTING CHART
SYMPTOMS | CAUSE | REMEDY | ||||||||||||||||||||||
2. Water and/or Oil in Supply | (Continued) | Poorly filtered inlet air (poor air quality to compressor). Check | ||||||||||||||||||||||
o r S e r v i c e R e s e r v o i r |
| for leaking, damaged or malfunctioning compressor air inlet | ||||||||||||||||||||||
(continued). |
| components (e.g. induction line, fittings, gaskets, filter bodies, | ||||||||||||||||||||||
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| etc.). Repair inlet components as needed. Note: Dirt ingestion will | ||||||||||||||||||||||
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| damage compressor and is not covered under warranty. | ||||||||||||||||||||||
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| If you found excessive oil present in the service reservoir and you | ||||||||||||||||||||||
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| did not find any issues above, the compressor may be passing oil. | ||||||||||||||||||||||
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| Replace compressor. If still under warranty, follow normal warranty | ||||||||||||||||||||||
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| process. | ||||||||||||||||||||||
| H. Compressor malfunction. | H. If excessive oil is present in the service reservoir and no other | ||||||||||||||||||||||
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| issues (from above) were found, the compressor may be | ||||||||||||||||||||
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| passing oil. Test the compressor using the Bendix® BASIC™ | ||||||||||||||||||||
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| cup method as described in the Bendix compressor service | ||||||||||||||||||||
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| manual and referred to in Appendix A, Table A, column 5. | ||||||||||||||||||||
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| Replace compressor. If still under warranty, follow normal warranty | ||||||||||||||||||||||
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| process. | ||||||||||||||||||||||
| I. Air | I. If the vehicle uses a Holset® compressor, inspect the | ||||||||||||||||||||||
| assembly. |
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| feedback check valve for proper installation and operation. | ||||||||||||||||||||
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| When replacing the desiccant cartridge, make sure desiccant | ||||||||||||||||||||||
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| cartridge assembly is properly installed and sealing rings are in | ||||||||||||||||||||||
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| place on mounting surface of desiccant cartridge. | ||||||||||||||||||||||
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| Check Valve |
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| Feed Back Line |
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| Typical |
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| J. | Desiccant requires replacement. | J. Replace desiccant cartridge assembly. Refer to Appendix A, |
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| Table A columns 3 & 4 for recommended intervals. |
3. Oil present at air dryer purge A. | Air brake charging system is | A. Air dryers remove water and oil from the air brake charging | |
exhaust or cartridge during | functioning normally. | system. A small amount of oil is normal. Check that regular | |
maintenance. |
| maintenance is being performed and that the amount of oil in | |
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| the air tanks (reservoirs) is within the acceptable range shown |
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| on the BASIC cup (see also column 5 of Appendix A, Table |
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| A). Replace the air dryer cartridge as needed and return the |
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| vehicle to service. |
24
