| TROUBLESHOOTING | |
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| SYMPTOM |
1. | Engine will not start. |
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PROBABLE CAUSE | REMEDY | |
Various engine problems. | Refer to engine manual accompanying your air | |
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| compressor. |
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| SYMPTOM |
2. | Noisy operation. |
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PROBABLE CAUSE | REMEDY | |
Loose engine pulley or pump flywheel. | Tighten pulley and or flywheel. | |
Lack of oil in the pump. | Add correct amount of oil. Check for bearing damage. | |
Carbon deposits on pistons or valves. | Remove cylinder head and inspect. Clean or replace. | |
Bearing, piston or connecting rod failure. | STOP THE COMPRESSOR! Contact Senco | |
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| Customer Service @ |
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| SYMPTOM |
3. | Air leaks from safety relief valve. |
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PROBABLE CAUSE | REMEDY | |
Possible defective safety relief valve. | Operate safety relief valve manually by pulling on | |
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| ring. If it still leaks, it should be replaced. |
Excessive air tank pressure. | Defective motor/pressure switch. Replace. | |
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| SYMPTOM |
4. | Air leaks at pump. |
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PROBABLE CAUSE | REMEDY | |
Defective gaskets. | Replace and torque head bolts to 20 ft./lbs. | |
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| SYMPTOM |
5. | Air leaks at fittings. |
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PROBABLE CAUSE | REMEDY | |
Fittings are not tight enough. | Tighten fittings where air can be heard escaping. | |
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| Check fittings with soapy water solution. Do not |
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| overtighten. |
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| SYMPTOM |
6. | Air leak in air tank. |
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PROBABLE CAUSE | REMEDY | |
Defective or rusted air tank. | Air tank must be replaced. Do not attempt to repair | |
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| air tank! |
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| SYMPTOM |
7. | Air blowing from inlet filter. |
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PROBABLE CAUSE | REMEDY | |
Damaged inlet (reed) valve. | Contact Senco Customer Service @ | |
12 | Senco® Gasoline Air Compressor Manual 2000 |