Air leaks from safety relief, Valve, Enough air

Problem Encountered

Air continues to leak at motor/pressure switch release valve while motor is running:

Possible Cause	Possible Solution
Defective motor/pressure switch.	Replace.
Check valve stuck in open position.	Replace check valve. DANGER — Do not disassemble the
	check valve with tank pressurized. Open tank petcock valve
	to allow air to escape from tank prior to servicing.

Air leaks from safety relief	Possible defective safety relief valve.	Operate safety relief valve manually by pulling on ring. If it
valve:		still leaks, it should be replaced.
	Excessive tank pressure.	Defective motor/pressure switch. Replace.
Air leaks at pump:	Blown gaskets.	Replace blown gaskets and torque head bolts to 20 ft./lbs.
		CAUTION — Replace head gasket with a new one each time
		the head is removed to ensure proper sealing.

Air leaks at fittings:

Fittings are not tight enough.

Tighten fittings where air can be heard escaping. Check fittings with soapy water solution. DO NOT OVERTIGHTEN.

Defective or rusted air tank.

Air tank must be replaced. DO NOT ATTEMPT TO REPAIR AIR TANK!

Air blowing from inlet filter:	Damaged inlet (reed) valve.	Contact Consumer Helpline at 1-800-423-3598.
Insufficient pressure at air tool	Pressure regulator knob is not turned	Adjust pressure regulator knob to proper setting.
or air accessory:	to high enough pressure.
	Defective motor/pressure regulator	Replace.
	switch.

	Restricted air intake filter.	Clean or replace the filter element.
	Air leaks.	Check for leaks by applying soap solution to all fittings and
		connections. Bubbles will appear at leakage points. Tighen or
		replace leaking fittings or connections as needed.

Hose or hose connections are too small or long.

Replace with larger hose or connectors.

Air compressor is not large enough for air requirement.

Check the accessory air requirement. If it is higher than the CFM or pressure supply of the air compressor, you need a larger air compressor.

Air compressor not making	Restricted air intake filter.	Clean or replace the filter element.
enough air:	Leaking (reed) valve.	Drain air tank and measure pump up time. Compare to
	Leaking (reed) valve.	Drain air tank and measure pump up time. Compare to
		specifications. If lower, remove pump head and inspect valve
		plate, valve seats, and valve reeds. Clean or replace as needed.
	Restricted pilot valve.	Clean or replace.
	Low compression.	Low pressure may be due to worn piston rings and cylinder
		walls. Inspect for excessive wear and replace worn parts as
		needed.

Excessive oil consumption:	Restricted air intake filter.	Clean or replace air filter element.
	Air compressor on unlevel surface.	Do not incline the air compressor more than 10 degrees in
		any direction while running.

	Crankcase overfilled with oil.	Drain oil. Refill to proper level with 30 weight non-detergent
		air compressor oil
	Plugged oil dipstick vent.	Clean and check breather for proper ventilation.
	Oil leaks.	Repair.
	Worn piston rings or scored cylinder.	Replace worn or damaged parts as needed.
	Improper oil viscosity.	Drain oil. Refill to proper level with 30 weight non-detergent
		air compressor oil.

Water in oil due to condensation.

Change oil and move air compressor to a less humid environment.

Moisture in discharge air:	Condensation in air tank caused by
	high level of atmospheric humidity or
	air compressor is not running long
	enough.

Drain tank after every use. Drain air tank more often in humid weather and use an air line filter.