Craftsman 919.195411 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
		specifications.
	Loose flywheel	Tighten flywheel screw; see
		Parts manual for torque
		specifications.
	Compressor mounting	Tighten mounting screws;
	screws loose.	see Parts manual for torque
		specifications.
	Loose belt.	Loosen wingnut and then
		tighten wingnut until it contacts
		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 contacts
		the washer, plus one turn.
Excessive belt	Loose belt.	Loosen wingnut and then
wear.		tighten wingnut until it contacts
		the washer, plus one turn.
	Tight belt.	Loosen wingnut and then
		tighten wingnut until it contacts
		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	Compressor pump has no	See "Oil-Checking" paragraph
sound.	oil.	in the "Maintenace" section.
	Loose belt.	Loosen wingnut and then
		tighten wingnut until it contacts
		the washer, plus one turn.

27- ENG A09713