Porter-Cable C3550 instruction 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.
	Compressor mounting	Tighten mounting screws,see
	screws loose	Parts manual for torque
		specifications.
	Carbon build-up in pump	Have checked by a Trained
		Service Technician.
Squealing		See Oil-Checking paragraph in
	Compressor pump has no
sound.	oil.	the Maintenance section.

D28914 24- ENG