1.
engine will not start.
Probable cause
Various engine problems.
2.
noisy operation.
Probable cause
Loose engine pulley or pump flywheel.
Lack of oil in the pump.
Carbon deposits on pistons or valves.
Bearing, piston or connecting rod failure.
3.
air leaks from safety relief valve.
Probable cause
Possible defective safety relief valve.
Excessive air tank pressure.
4.
air leaks at pump.
Probable cause
Defective gaskets.
5.
Air leaks at fittings.
Probable cause
Fittings are not tight enough.
6.
air leak in air tank.
Probable cause
Defective or rusted air tank.
7.
Air blowing from inlet filter.
Probable cause
Damaged inlet (reed) valve.
2
troublesHooting
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Refer to engine manual accompanying your air
compressor.
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Tighten pulley and or flywheel.
Add correct amount of oil. Check for bearing damage.
Remove cylinder head and inspect. Clean or replace.
STOP THE COMPRESSOR! Contact Senco
Customer Service @ 800-543-4596.
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Operate safety relief valve manually by pulling on
ring. If it still leaks, it should be replaced.
Defective motor/pressure switch. Replace.
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Replace and torque head bolts to 20 ft./lbs.
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Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. do not
overtighten.
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Air tank must be replaced. do not attempt to repair
air tank!
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Contact Senco Customer Service @ 800-543-4596.
Senco
Gasoline Air Compressor Manual 2005
®