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

Page 24
Image 24
Porter-Cable C3550 instruction manual Problem Cause Correction