AD-IP™ AIR DRYER TROUBLESHOOTING CHART (Continued)
SYMPTOMS | CAUSE | REMEDY |
2. Water and/or Oil in |
| Discharge Line |
| maintain a constant slope down from the | |
Supply or Service |
| |
| compressor to the air dryer inlet fitting to avoid low | |
Reservoir (continued). |
| |
| points where ice may form and block the flow. If, | |
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| |
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| instead, ice blockages occur at the air dryer inlet, |
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| insulation may be added here, or if the inlet fitting is |
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| a typical 90 degree fitting, it may be changed to a |
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| straight or 45 degree fitting. For more information on |
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| how to help prevent discharge line |
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| Bendix Bulletins |
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| discharge line lengths or insulation may be required |
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| in cold climates. |
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| Insufficient coolant flow through compressor. Inspect |
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| coolant line. Replace as necessary (I.D. is 1/2” |
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| min.). Inspect the coolant lines for kinks and |
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| restrictions and fittings for restrictions. Replace as |
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| necessary. Verify coolant lines go from engine block |
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| to compressor and back to the water pump. Repair |
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| as necessary. |
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| Restricted air inlet (not enough air to compressor). |
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| Check compressor air inlet line for restrictions, |
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| brittleness, soft or sagging hose conditions etc. |
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| Repair as necessary. Inlet line size is 3/4 ID. |
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| Maximum restriction requirement for compressors is |
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| 25 inches of water. Check the engine air filter and |
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| service if necessary (if possible, check the air filter |
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| usage indicator). |
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| Poorly filtered inlet air (poor air quality to |
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| compressor). Check for leaking, damaged or |
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| malfunctioning compressor air inlet components |
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| (e.g. induction line, fittings, gaskets, filter bodies, |
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| etc.). Repair inlet components as needed. Note: Dirt |
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| ingestion will damage compressor and is not |
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| covered under warranty. |
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| If you found excessive oil present in the service |
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| reservoir and you did not find any issues above, the |
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| compressor may be passing oil. |
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| Replace compressor. If still under warranty, follow |
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| normal warranty process. |
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|
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| G. Compressor malfunction. | G. If you found excessive oil present in the service |
|
| reservoir and you did not find any issues above, |
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| the compressor may be passing oil. Test the |
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| compressor using the BASIC cup method as |
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| described in the Bendix compressor service |
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| manual and referred to in Appendix A, Table A, |
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| column 5. |
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| Replace compressor. If still under warranty, follow |
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| normal warranty process. |
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|
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| H. Air | H. If vehicle uses Holset compressor, inspect |
| cartridge assembly. | feedback check valve for proper installation and |
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| operation. |
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