200-2358
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Note: Troubleshooting problems may have similar causes and solutions.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Low Discharge Pressure
Air leaks
Tighten or replace leaking fittings or
connections. Do not overtighten.
Leaking valves
Contact authorized service center.
Restricted air intake
Clean or replace air filter element(s).
Blown gaskets
Contact authorized service center.
Worn piston rings or cylinder
Contact authorized service center.
Pump Knocking
Loose engine pulley or compressor
flywheel
Retighten pulley and flywheel. Check
alignment.
Low oil level in pump crankcase
Keep oil at proper level at all times.
Excess carbon on valves or top of piston
Contact authorized service center.
Oil in Discharge Air
Worn piston rings or cylinder
Contact authorized service center.
Restricted air intake
Clean or replace the air filter element(s).
Oil level too high
Reduce to proper level. Use
non–detergent oil.
Overheating
Poor ventilation
Relocate compressor to an area with cool,
dry, well circulated air, at least 12 in. from
nearest wall.
Dirty cooling surfaces
Clean all cooling surfaces thoroughly.
Restricted air passages
Replace transfer tubes and/or unloader.
Excessive Belt Wear
Pulley out of alignment
Realign pulley with compressor flywheel.
Improper belt tension
Readjust.
Pulley wobbles
Replace the pulley and check for a
damaged crankshaft or flywheel.
Excessive Unloader Cycling
Air leaks in piping
Tighten or replace leaking fittings or
connections. Do not overtighten.
Gasoline Engine Stall
Air leaks in piping
Tighten or replace leaking fittings or
connections. Do not overtighten.
Compressor Won’t Start in Cold
Temperatures
Compressor not winterized
See cold weather preparation.
Engine flooded
Remove spark plug and dry it. Reinstall.
Compressor too cold
Move compressor to a warmer location.
TROUBLESHOOTING CHART
