PROBLEM | CAUSE | CORRECTION |
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Pressure reading on the regu- | It is normal for some pressure drop | If there is an excessive amount of pressure | ||
lated pressure gauge drops when | to occur. | drop when the accessory is used, adjust the | ||
an accessory is used. |
| regulator. | ||
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| NOTE | ||
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| Adjust the regulated pressure under flow con- | ||
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| ditions (while accessory is being used). | ||
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Air leak from safety valve. | Possible defect in safety valve. | Operate safety valve manually by pulling on | ||
ring. If valve still leaks, it should be | ||||
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| replaced . | ||
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Knocking noise | Defective check valve. | Remove and clean or replace. | ||
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| Loose pulley. | Torque pulley set screw. | ||
| Low oil level. | Maintain prescribed oil level. Add oil. | ||
| Loose flywheel. | Torque screw | ||
| Loose compressor mounting screws. | Check screws. Torque as required | ||
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| Loose belt. | Tighten wing nut until it contacts the | ||
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| washer, plus one more turn. | ||
| Belt too tight. | Adjust belt tension (see "Belt Replace- | ||
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| ment".) | ||
| Carbon | Remove the head and valve plate. Clean | ||
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| the valve plate and top of the piston. (Be | ||
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| sure carbon does not fall into the cylinder.) | ||
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| Reassemble to | ||
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| gasket and torque screws. | ||
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Air leaks at or inside check | Defective or dirty check valve. | A defective check valve results in a constant air | ||
valve. |
| leak at the pressure release valve when there is | ||
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| pressure in the tank and the compressor is shut | ||
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| off. Remove and clean or replace check valve. | ||
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| DO NOT | ||
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Excessive belt wear. | Belt is too loose or tight. | Adjust tension instructions. (See "Belt | ||
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| Asjustment or Replacement" section in this | ||
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| manual. | ||
| Loose pulley. | Check for worn keyway or pulley bore. Also | ||
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| check for bent motor shaft. Replace parts if | ||
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| necessary. | ||
| Pulley misalignment. | Motor pulley and flywheel must be in line within | ||
| 1/32". (See "Pulley and Flywheel - Alignment" | |||
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| section in this manual.) | ||
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Squealing sound. | Loose belt. | Adjust belt tension. (See "Belt Replacement" | ||
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| section in this manual.) | ||
| There is no oil in the compressor. | Add oil to top of fill hole in base. | ||
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15 — ENG | D21245 |
