PROBLEM |
| CAUSE | CORRECTION | |
Knocking Noise. |
| Possible defect in safety | Operate safety valve manually | |
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| valve. | by pulling on ring. If valve still | |
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| leaks, it should be replaced. |
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| Loose pulley. | Tighten pulley set screw, see | |
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| Parts manual for torque speci- |
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| fications. |
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| Loose flywheel. | Tighten flywheel screw, see | |
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| Parts manual for torque speci- |
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| fications. |
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| Compressor or engine | Tighten mounting screws,see | |
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| mounting screws loose. | Parts manual for torque speci- | |
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| fications. |
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| Loose belt. | Check belt tension, see | |
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| Adjusting Belt Tension in the |
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| Maintenance section |
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| Carbon | Have checked by a Trained | |
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| Service Technician. |
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| Belt to tight. | Check belt tension, see | |
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| Adjusting Belt Tension in the |
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| Maintenance section |
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| Check both nuts and tighten if |
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| Stiffener bar loose. | ||
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| required. |
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| Low oil level (compressor | Maintain prescribed oil level. | |
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| or engine) | Add oil. | |
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Excessive belt |
| Loose belt. | Check belt tension, see | |
wear. |
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| Adjusting Belt Tension in the |
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| Maintenance section |
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| Tight belt. | Check belt tension, see | |
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| Adjusting Belt Tension in the |
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| Maintenance section |
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| Loose pulley. | Have checked by a Trained | |
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| Service Technician. |
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| Pulley misalignment. | See Motor Pulley/Flywheel | |
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| Alignment paragraph in the |
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| Maintenance section. |
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D26998 |
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