Porter-Cable C7510 User Manual

Page 26

26- ENG

D28176

PROBLEM

CAUSE

CORRECTION

Knocking Noise. Possible defect in safety

valve.

Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.

Loose pulley

Tighten pulley set screw,see
Parts manual for torque
specifications.

Compressor mounting
screws loose

Tighten mounting screws,see
Parts manual for torque
specifications.

Loose flywheel

Tighten flywheel screw,see
Parts manual for torque
specifications.

Loose belt

Check belt tension, see
Adjusting Belt Tension in the
Maintenance section

Carbon build-up in pump

Have checked by a Trained
Service Technician.

Belt to tight

Check belt tension, see
Adjusting Belt Tension in the
Maintenance section

Excessive belt
wear

Loose belt.

Tight belt.

Loose pulley.

Have checked by a Trained
Service Technician.

Pulley misalignment.

See Motor Pulley/Flywheel
Alignment paragraph in the
Maintenace section.

Squealing
sound.

Loose belt.

Compressor pump has no
oil.

See Oil-Checking paragraph in
the Maintenace section.

Check belt tension, see
Adjusting Belt Tension in the
Maintenance section

Defective check valve.

Remove and clean, or replace.