Troubleshooting

Performing repairs may expose voltage sources, moving parts or compressed air sources. Personal injury may

occur. Prior to attempting any repairs, unplug the air compressor and bleed off all air tank air pressure.

PROBLEM	CAUSE		CORRECTION
Excessive tank	Pressure switch does not	Move On/Auto/Off lever to
pressure -	shut off motor when	the "Off" position, if the unit
safety valve	compressor reaches "cut-	does not shut off contact a
pops off.	out" pressure.	Trained Service Technician.
		Contact a Trained Service
	Pressure switch "cut-out"	Technician.
	too high.

Air leaks at	Tube fittings are not tight	Tighten fittings where air can
fittings.	enough.	be heard escaping. Check
		fittings with soapy water
		solution. DO NOT OVER
		TIGHTEN.

Air leaks at or	Check valve seat damaged.		A defective check valve
inside check			results in a constant air leak
valve.			at the pressure release valve
			when there is pressure in the
			tank and the compressor is
			shut off. Replace check
			valve. Refer the "To Replace
			or Clean Check Valve" in the
			"Service and Adjustments"
			section.

Air leaks at	Defective pressure switch	Contact a Trained Service
pressure switch	release valve.	Technician.
release valve.

Air leaks in air	Defective air tank.	Air tank must be replaced.
tank or at air		Do not repair the leak.
tank welds.				Do not drill


				into, weld


		or otherwise modify air
		tank or it will weaken. The
		tank can rupture or
		explode.

Air leaks	Leaking seal.	Contact a Trained Service
between head		Technician.
and valve plate.

D24938

24- ENG

TROUBLESHOOTING