Troubleshooting
TROUBLE | PROBABLE CAUSE | REMEDY |
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Excessive noise | 5. Worn bearings | 5. Replace worn bearings |
(knocking) |
| and change oil |
Continued | 6. Piston hitting the valve | 6. Remove the compressor |
| plate | head and valve plate and |
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| inspect for carbon deposits |
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| or other foreign matter on |
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| top of piston. Replace |
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| head and valve plate using |
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| new gasket |
| 7. Noisy check valve | 7. Replace |
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Oil in the discharge | 1. Worn piston rings | 1. Replace with new rings |
air | 2. Compressor air intake | 2. Clean filter. Check for other |
| restricted | restrictions in the intake |
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| system |
| 3. Restricted breather | 3. Clean and check breather |
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| for free operation |
| 4. Excessive oil in compres- | 4. Drain down to full level |
| sor |
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| 5. Wrong oil viscosity | 5. Use SAE 30 (ISO 100) |
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| |
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| oil |
| 6. Connecting rod out of | 6. Replace rod |
| alignment |
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