DeVilbiss Ex-Cell E7540 Operation Manual page 23

PROBLEM
Knocking Noise Possible defect in safety
Excessive belt
wear
Squealing
sound
CAUSE
valve.
Defective check valve.
Loose pulley.
Loose flywheel.
Compressor
screws loose.
Loose belt.
Carbon build-up in pump. Have checked by a Trained Service
Belt to tight.
Loose belt.
Tight belt.
Loose pulley.
Pulley misalignment.
Compressor pump has no
oil.
Loose belt.
Operate safety valve manually by
pulling on ring. If valve still leaks, it
should be replaced.
Remove and clean, or replace.
Tighten pulley set screw, see Parts
manual for torque specifications.
Tighten flywheel screw, see Parts
manual for torque specifications.
mounting Tighten mounting screws,see Parts
manual for torque specifications.
Check belt tension, see "Adjusting Belt
Tension" in the Maintenance section.
Technician.
Check belt tension, see "Adjusting Belt
Tension" in the Maintenance section.
Check belt tension, see "Adjusting Belt
Tension" in the Maintenance section.
Check belt tension, see "Adjusting Belt
Tension" in the Maintenance section.
Have checked by a Trained Service
Technician.
See "Motor Pulley/Flywheel Alignment"
paragraph
section.
See "Oil-Checking" paragraph in the
Maintenance section.
Check belt tension, see "Adjusting Belt
Tension" in the Maintenance section.
23-ENG
CORRECTION
in the Maintenance
1000003473