BENDIX® AD-IP® AIR DRYER TROUBLESHOOTING CHART
SYMPTOMS | CAUSE | REMEDY | |
8. | Desiccant material | A. This symptom is almost | A. See Causes and Remedies for Symptoms 1, 2, 3, |
| being expelled from | always accompanied by | 4 and 5. |
| the air dryer purge | one, or more, of Symptoms |
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| valve exhaust (may | 1, 2, 3, 4 and 5. See related |
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| look like whitish liquid | causes for these symptoms |
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| above. |
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| or paste or small |
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| beads.) |
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| - OR - | B. Air dryer not securely | B. Vibration should be held to minimum. Add bracket |
| mounted. (Excessive | supports or change the air dryer mounting location | |
| Unsatisfactory | ||
| vibration.) | if necessary. | |
| desiccant life. | ||
| C. Malfunctioning or saturated | C. Replace the desiccant cartridge assembly. | |
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| desiccant cartridge. |
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| D. Compressor passing | D. Check for proper compressor installation; if |
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| excessive oil. | symptoms persist, replace the compressor. |
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| E. Desiccant cartridge not | E. Check the torque on the desiccant cartridge |
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| assembled properly to | to end cover attachment. Refer to the assembly |
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| the end cover. (Loose | section of this data sheet. |
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| attachment.) |
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9. | “Pinging” noise | A. Single cylinder compressor | A. A slight “pinging” sound may be heard during |
| excessive during | with high pulse cycles. | the system |
| compressor loaded |
| compressor is used. If this sound is deemed |
| cycle. |
| objectionable, it can be reduced substantially |
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| by increasing the discharge line volume. |
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| This can be accomplished by adding an additional |
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| four feet of discharge line or adding a 90 cubic |
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| inch reservoir between the compressor and the air |
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| dryer. IMPORTANT: Do not exceed the line lengths |
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| requirements specified in this manual. |
10. Constant seepage of | A. Defective check valve | A. Refer to Remedy C, Symptom #1. | |
| air at air dryer purge | assembly in Bendix® |
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| valve exhaust (non- | air dryer end cover. |
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| charging mode.) | B. Leaking turbo | B. Repair or replace purge valve assembly |
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| C. Leaking purge valve control | C. Repair or replace purge valve assembly. |
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| piston |
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11. The air dryer purge | A. Compressor fails to “unload”. | A. Faulty governor installation; no air line from the | |
| piston cycles rapidly |
| governor to the compressor or the air line is kinked |
| in the compressor |
| or restricted. Install or repair the air line. |
| unloaded (non- |
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| compressing) mode. |
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