background image

9 - ENG

A defective check valve results in a constant air leak
when there is pressure in the tank and the compressor
is shut off.  Remove and clean or replace check valve.

DO NOT OVER-TIGHTEN.

Defective air tank.

CORRECTION

Excessive tank pressure - safety
valve pops off.

Pressure switch does not shut off mo-
tor when compressor reaches “cut-out”
pressure.

Move the pressure switch lever to the “OFF” position.
If the outfit doesn’t shut off, unplug. If the electrical
contacts are welded together, replace the pressure
switch.

Pressure '"cut-out" too high.

Return the outfit to an authorized dealer to check and
adjust, or replace switch.

PROBLEM

Air leaks at fittings.

Tube fittings are not tight enough.

Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. 

DO NOT

OVER-TIGHTEN.

Air leaks at or inside check valve.

Defective or dirty check valve.

Air leaks in air tank or at air tank
welds.

DO NOT DRILL INTO, WELD OR OTHERWISE
MODIFY AIR TANK OR IT WILL WEAKEN.
THE TANK CAN RUPTURE OR EXPLODE.

TROUBLESHOOTING  GUIDE

PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COMPRESSED
AIR SOURCES.  PERSONAL INJURY MAY OCCUR.  PRIOR TO ATTEMPTING ANY REPAIRS,
UNPLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.

CAUSE

Pressure reading on the regu-
lated pressure gauge drops when
an accessory is used.

It is normal for “some” pressure drop to
occur.

If there is an excessive amount of pressure drop when
the accessory is used, adjust the regulator following
the instructions on page 7.

NOTE

Adjust the regulated pressure under flow
conditions (while accessory is being
used).

Air tank must be replaced.  Do not repair the leak.

Summary of Contents for MG1-UMCCOMP-3

Page 1: ...ion of the nearest Authorized Service Center for ordering repair parts and for warranty repairs When ordering repair parts from your local Authorized Service Center always give the following informati...

Page 2: ...l be inspected at the site of installation Contact the nearest Authorized Warranty Service Center that provides on site service calls for service call arrangement o If the purchaser does not receive s...

Page 3: ...MAKE ANY MODIFICATIONS TO THE TANK or its attachments Never attempt to repair a damaged or leaking tank Replace with a new tank The tank is designed to withstand specific operating pressures NEVER MAK...

Page 4: ...ctly or from a breathing device connected to the compressor WORK IN AN AREA equipped WITH GOOD CROSS VENTILATION Read and FOLLOW THE SAFETY INSTRUCTIONS provided on the label or safety data sheet FOR...

Page 5: ...ylinder single stage air compressor pump an air tank and associated controls and instruments Thisaircompressorrequiresnooil Nowyoucanenjoyall the benefits of having an air compressor without ever havi...

Page 6: ...ncoolingsystem Attheheartofthiscoolingsystem is an engineered fan It is perfectly normal for this fan to blowairthroughtheventholesinlargeamounts Youknow that the cooling system is working when air is...

Page 7: ...lt if the followingbreak ininstructionsare notcloselyfollowed The air compressor is equipped with a cord having a grounded wire with an appropriate grounding plug The plug must be used with an outlet...

Page 8: ...ur com pressor is ready for use 5 Alwaysoperatetheaircompressorinwell ventilated areas freeofgasolineorothersolventvapors Donot operate the compressor near the spray area TOO MUCH AIR PRESSURE CAUSES...

Page 9: ...air can be heard escaping Check fittings with soapy water solution DO NOT OVER TIGHTEN Airleaksatorinsidecheckvalve Defective or dirty check valve Air leaks in air tank or at air tank welds DO NOT DRI...

Page 10: ...essureexceedspressureswitch cut in pressure Check for proper gauge wire and cord length Wrong gauge wire or length of exten sion cord Loose electrical connections Check wiring connection inside pressu...

Page 11: ...11 ENG GENERAL MANUAL FOR PERMANENTLY LUBRICATED AIR COMPRESSOR SERVICE NOTES...

Page 12: ...GENERAL MANUAL FOR PERMANENTLY LUBRICATED AIR COMPRESSOR DeVilbiss Air Power Company 213 Industrial Drive Jackson TN 38301 9615 SERVICE NOTES...

Reviews: