Sears 919.72633 owner manual Troubleshooting Guide, Problem Cause Correction

Page 10

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 COM- PRESSOR AND BLEED OFF TANK AIR PRESSURE.

PROBLEM

CAUSE

CORRECTION

 

 

 

Excessive tank pressure - safety

Pressure switch does not shut off

Move the pressure switch lever to the “O”

valve pops off.

motor when compressor reaches

position. If the compressor doesn’t shut off,

 

cut-out pressure.

disconnect from the electrical outlet source

 

 

and return to a Sears Service Center to re-

 

 

place the pressure switch.

 

Pressure switch cut-out too high.

Return the compressor to Sears Service Cen-

 

 

ter to check and adjust, or replace switch.

 

 

 

Air leaks at fittings or hose.

Tube or hose fittings are not tight

Tighten fittings using teflon tape where air

 

enough.

can be heard escaping. Check fittings with

 

 

soapy water solution. DO NOT OVER-

 

 

TIGHTEN.

 

 

 

Air leaks at pressure switch

Defective pressure switch release valve.

Return to Sears Service Center for replace-

release valve.

 

ment of pressure switch.

 

 

Check to see if the pin in the bottom of the

 

 

pressure release valve is stuck. If it does not

 

 

move freely, return to the Service Center for

 

 

replacement of pressure switch.

 

Defective or dirty check valve.

A defective check valve results in a constant

 

 

air leak at the pressure release valve when

 

 

there is pressure in the tank and the com-

 

 

pressor is shut off. Remove and clean or re-

 

 

place check valve. DO NOT OVERTIGHTEN.

 

 

 

Air leaks in air tank or at air tank

Defective air tank.

Air tank must be replaced. Do not repair the

welds.

 

leak. Return compressor to Sears Service

 

 

Center.

 

 

DO NOT DRILL INTO, WELD OR OTHER-

 

 

WISE MODIFY AIR TANK OR IT WILL

 

 

WEAKEN. THE TANK CAN RUPTURE OR

 

 

EXPLODE.

 

 

 

Air leaks between head and valve

Leaking seal.

Torque head screws to 7-10 ft. lbs. If this

plate.

 

does not stop leak, replace seal.

 

 

 

Pressure reading on the regu-

It is normal for some pressure drop

If there is an excessive amount of pressure

lated pressure gauge drops when

to occur.

drop when the accessory is used, adjust the

an accessory is used.

 

regulator.

 

 

NOTE

 

 

Adjust the regulated pressure under flow

 

 

conditions (while accessory is being used).

 

 

 

Air leak from safety valve.

Possible defect in safety valve.

Operate safety valve manually by pulling

 

 

on ring. If valve still leaks, it should be

 

 

replaced .

 

 

 

Knocking noise

Defective check valve.

Remove and clean, or replace.

 

 

 

10

Image 10
Contents Model No 919.726330 MGP-726330 10/1/96Table of Contents Safety Guidelines What to Look for What could Happen HOW to Prevent ITWhat could Happen HOW to Prevent IT Glossary Specification ChartGeneral Information Model No 919.726330Tools Needed for Assembly Description of OperationBREAK-IN Procedures Location of the Air CompressorOperating Procedures Voltage and Circuit ProtectionMaintenance Check Valve Cleaning ReplacementTroubleshooting Guide Problem Cause CorrectionTroubleshooting Guide Service Notes Service Notes Service and Repair Parts De modèle Table DES Matières Tension et protection du circuitConsignes DE Sécurité AvertissementAir comprimé Tableau DES Spécifications Information GénéraleGlossaire De modèle Nombre de cylindres AlésageDescription DU Fonctionnement Outils Nécessaires À L’ASSEMBLAGEAssemblage Installation ET RodageEmplacement du compresseur Lubrification et huileTension et protection du circuit Mise EN MarcheDirectives de rodage Soupape de sûreté Inspection Clapet de retenue Nettoyage et remplacementEntretien MoteurProblème Cause Solution Guide DE DépannageGuide DE Dépannage suite Page Page DE Modèle Entretien Pour Commander DES Pièces DE Rechange