Note: Troubleshooting problems may have similar causes and solutions.
PROBLEM POSSIBLE CAUSE SOLUTION
Check that power supply is adequate and that compressor is on a
dedicated circuit. If using extension cord, try using without. If
compressor is connected to a circut protected by a fuse, use dual
element time delay fuses (Buss Fusetron type “T” only).
Readjust belt tension
Low voltage/motor overload
Drive belt too tight
Excessive current draw
trips circuit breaker of
motor reset switch
Compressor stalls
Low discharge pressure
Compressor pump
knocking
Oil in discharge air
Overheating
Excessive belt wear
Compressor won’t start
in cold temperatures
Inspect and replace transfer tubes or check valve, as required.
Restricted air passages
Furnish adequate power.
Low voltage motor
Replace the check valve.
Bad check valve
Contact authorized service center.
Seized pump
Tighten or replace leaking fittings or connections. Do not
overtighten.
Air leaks
Contact authorized service center.
Leaking valves
Clean or replace air filter element(s).
Restricted air intake
Contact authorized service center.
Blown gaskets
Contact authorized service center.
Worn piston rings or cylinder
Retighten pulley and flywheel. Check alignment.
Loose engine pulley or
compressor flywheel
Keep oil at proper level at all times.
Low oil level in pump crankcase
Contact authorized service center.
Excess carbon on valves or top
of piston
Contact authorized service center.
Worn piston rings or cylinder
Clean or replace the air filter element(s).
Restricted air intake
Reduce to proper level.
Oil level too high
Relocate compressor to an area with cool, dry, well circulated air,
at least 12 in. from nearest wall.
Poor ventilation
Clean all cooling surfaces thoroughly.
Dirty cooling surfaces
Replace transfer tubes and/or unloader.
Restricted air passages
Realign pulley with compressor flywheel.
Pulley out of alignment
Readjust.
Improper belt tension
Open petcock when starting motor.
Too much back pressure in tank
Use synthetic, non-detergent air compressor oil.
40W oil in crankcase
Move compressor to a warmer location.
Compressor too cold
Replace the pulley and check for a damaged crankshaft or
flywheel.
Pulley wobbles
TROUBLESHOOTING CHART
200-2357
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