Craftsman 919.166442 owner manual Troubleshooting

TROUBLESHOOTING

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

voltage 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		Move On/Auto/Off lever to
pressure - safety	not shut off motor when		the "Off" position, if the
valve pops off.	compressor reaches "cut-		outfit does not shut off
	out" pressure.		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
fittings.	enough.		can be heard escaping.
			Check fittings with soapy
			water solution. Do Not
			Overtighten.
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.
Air leak from	Possible defect in safety		Operate safety valve
safety valve.	valve.		manually by pulling on ring.
			If valve still leaks, it should
			be replaced.
Knocking Noise.	Possible defect in safety	Operate safety valve
	valve.	manually by pulling on ring.
		If valve still leaks, it should
		be replaced.

19- ENG A13640