Craftsman 919.19541 owner manual Problem Cause Correction

PROBLEM	CAUSE	CORRECTION
Knocking Noise.	Possible defect in safety	Operate safety valve manually
	valve.	by pulling on ring. If valve still
		leaks, it should be replaced.
	Defective check valve.	Remove and clean, or replace.
	Loose pulley	Tighten pulley set screw; see
		Parts manual for torque speci-
		fications.
	Loose flywheel	Tighten flywheel screw; see
		Parts manual for torque speci-
		fications.
	Compressor mounting	Tighten mounting screws; see
	screws loose	Parts manual for torque speci-
		fications.
	Loose belt	Loosen wingnut and then
		tighten wingnut until it con-
		tacts the washer, plus one
		turn.
	Carbon build-up in pump	Have checked by a Trained
		Service Technician.
	Belt to tight	Loosen wingnut and then
		tighten wingnut until it con-
		tacts the washer, plus one
		turn.
Excessive belt	Loose belt.	Loosen wingnut and then
wear		tighten wingnut until it con-
		tacts the washer, plus one
		turn.
	Tight belt.	Loosen wingnut and then
		tighten wingnut until it con-
		tacts the washer, plus one
		turn.
	Loose pulley.	Have checked by a Trained
		Service Technician.
	Pulley misalignment.	See Motor Pulley/Flywheel
		Alignment paragraph in the
		Maintenance section.
Squealing		See Oil-Checking paragraph in
	Compressor pump has no
sound.	oil.	the Maintenace section.
		Loosen wingnut and then
	Loose belt.
		tighten wingnut until it con-
		tacts the washer, plus one
		turn.

27- ENG D24910