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TROUBLESHOOTING
WARNING - Make sure you completely understand all of the safety warnings and operation of each system
control component before attempting any maintenance or repair. Always drain the tank pressure completely, make
sure the power cord is unplugged, and unit has time to cool before performing any maintenance or service
operations.
PROBLEM CAUSE SOLUTION
Pump is slow to build tank pressure
Loose/slipping belt Adjust belt tension
Excessive leaks in system Correct air leaks
Blown gasket Replace head gaskets
Broken reed valve Replace reed valves
Obstructed intake filter Clean or replace intake element
Leaking regulator Replace regulator
Defective pilot valve Replace pilot valve
Excessive oil consumption
Too much oil in crankcase Drain to proper level
Improper weight of oil Replace with proper oil
Obstructed crankcase vent
Replace dipstick or oil fill
plug/crankcase vent
Dirty/plugged intake filter Clean/replace intake filter
Worn piston rings Take unit in for service
Scored cylinder Take unit in for service
Knocking noise
Loose pulley or flywheel Tighten appropriate parts
Loose belts Adjust belt tension
Internal pump problem Take unit in for service
Overheating compressor
Poor ventilation Relocate compressor
Improper pump rotation Contact an electrician
Internal pump problem Take unit in for service
Electric motor dead,
will not even hum
Thermal overload tripped Locate and push reset button
Reset physically broken Replace overload/reset
Loose motor leads or electrical
connection
Locate and correct loose electrical
connection(s)
Short in power cord Replace power cord
Motor trips overload/reset button
Motor is starting/stopping
excessively
Install constant speed or dual control
kit
Overload is defective/wea
Replace overload
Improper gauge of extension cord
Use longer lengths of air hose or
heavier cord
Stripped or poorly tightened motor
thru bolts
Retighten or replace stripped thru
bolts
Cracks in end bell or housing Take unit in for service
Gasoline engine is hard to start
Fouled, incorrect, or improperly
gapped spark plug
Install proper spark plug after
gapping to factory specs
Improper engine oil level Fill to top of threads for oil plug
Improper weight of pump or engine
oil
Change to proper weight of oil for
operating temperature
Improper or old gas Take unit in for service
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