AD-IP™ AIR DRYER TROUBLESHOOTING CHART (Continued)
SYMPTOMS | CAUSE | REMEDY |
2. Water and/or Oil in |
| When replacing the desiccant cartridge, make |
| sure desiccant cartridge assembly is properly | |
Supply or Service |
| |
| installed and sealing rings are in place on | |
Reservoir (continued). |
| |
| mounting surface of desiccant cartridge. | |
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| |
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| Check Valve |
Feedback Line
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| Typical |
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| I. Desiccant requires | I. Replace desiccant cartridge assembly. Refer to |
| replacement. | Appendix A, Table A columns 3 & 4 for |
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| recommended intervals. |
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3. Oil present at air dryer | A. Air brake charging | A. Air dryers remove water and oil from the air |
purge exhaust or | system is functioning | brake charging system. A small amount of oil is |
cartridge during | normally. | normal. Check that regular maintenance is |
maintenance. |
| being performed and that the amount of oil in the |
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| air tanks (reservoirs) is within the acceptable |
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| range shown on the BASIC cup (see also |
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| column 5 of Appendix A, Table A). Replace the |
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| air dryer cartridge as needed and return the |
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| vehicle to service. |
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4. Safety valve on air dryer | A. Restriction between air | A. Check to determine if air is reaching supply |
“popping off” or | dryer and supply (first) | reservoir. Inspect for kinked tubing or hose. |
exhausting air. | reservoir. | Check for undrilled or restricted hose or tubing |
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| fittings and repair or replace as needed. |
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| B. Air dryer safety valve | B. Verify relief pressure is at vehicle or component |
| malfunction. | manufacturer specifications. Replace if |
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| malfunctioning. |
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| C. Desiccant cartridge | C. Refer to Appendix A Table A and column 3. |
| maintenance required. | Check compressor for excessive oil passing |
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| and/or correct compressor installation. Repair or |
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| replace as necessary. Replace desiccant |
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| cartridge. |
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| D. Malfunctioning discharge | D. Test to determine if air is passing through check |
| check valve in end cover | valve. Repair or replace. |
| of the |
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| E. Excessive pressure | E. Increase volume in discharge line by increasing |
| pulsations from | length or diameter. Add a ping tank (small |
| compressor. (Typical | reservoir). |
| single cylinder type). |
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