DeWalt DeVILBISS 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,see
	screws loose.	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		See Oil-Checking paragraph in
	Compressor pump has no
sound.	oil.	the Maintenance section.
		Loosen wingnut and then
	Loose belt.
		tighten wingnut until it
		contacts the washer, plus one
		turn.

D23766 28- ENG