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Note: Troubleshooting problems may have similar causes and solutions.
PROBLEM
Low Discharge Pressure
Pump Knocking
Oil in Discharge Air
Overheating
Excessive Belt Wear
Excessive Unloader Cycling
Gasoline Engine Stall
Compressor Won't Start in Cold
Temperatures
20
TROUBLESHOOTING CHART
POSSIBLE CAUSE
Air leaks
Leaking valves
Restricted air intake
Blown gaskets
Worn piston rings or cylinder
Loose engine pulley or compressor
flywheel
Low oil level in pump crankcase
Excess carbon on valves or top of piston
Worn piston rings or cylinder
Restricted air intake
Oil level too high
Poor ventilation
Dirty cooling surfaces
Restricted air passages
Pulley out of alignment
Improper belt tension
Pulley wobbles
Air leaks in piping
Air leaks in piping
Compressor not winterized
Engine flooded
Compressor too cold
SOLUTION
Tighten or replace leaking fittings or
connections. Do not overtighten.
Contact authorized service center.
Clean or replace air filter element(s).
Contact authorized service center.
Contact authorized service center.
Retighten pulley and flywheel. Check
alignment.
Keep oil at proper level at all times.
Contact authorized service center.
Contact authorized service center.
Clean or replace the air filter element(s).
Reduce to proper level. Use SAE 10W-30
synthetic oil.
Relocate compressor to an area with cool,
dry, well circulated air, at least 12 in. from
nearest wall.
Clean all cooling surfaces thoroughly.
Replace transfer tubes and/or unloader.
Realign pulley with compressor flywheel.
Readjust.
Replace the pulley and check for a
damaged crankshaft or flywheel.
Tighten or replace leaking fittings or
connections. Do not overtighten.
Tighten or replace leaking fittings or
connections. Do not overtighten.
See cold weather preparation.
Remove spark plug and dry it. Reinstall.
Move compressor to a warmer location.
200-2415
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