Craftsman 919.167461 owner manual Troubleshooting, Problem Cause Correction

TROUBLESHOOTING

Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you may be exposed to volt-

age sources, compressed air, or moving parts. Before servicing unit unplug or disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air compressor to cool.

PROBLEM	CAUSE		CORRECTION
Excessive tank	Pressure switch does not	Move On/Auto/Off lever to
pressure - safe-	shut off motor when com-	the "OFF" position, if the
ty valve pops	pressor reaches "cut-out"	unit does
off.	pressure.	not shut off contact a
		Trained Service Technician.
	Pressure switch "cut-out"	Contact a Trained Service
	too high.	Technician.
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 Adjustment"
		section.
Air leaks at	Defective pressure switch	Contact a Trained Service
pressure switch	release valve.	Technician.
release valve.
(if equipped)
Air leaks in air	Defective air tank.	Air tank must be replaced.
tank or at air		Do not repair the leak.
tank welds.				Risk of
				Bursting.
		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.

19- ENG D28071