Sears 919.727321 owner manual Troubleshooting Guide, Problem Cause Correction

Page 11

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.

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 Center

 

 

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 con-

 

 

ditions (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.

 

 

 

11 — ENG

D20015 Rev. 1 6/28/00

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Contents Model No Safety Guidelines Definitions Table of ContentsRisk of Explosion or Fire Important Safety InstructionsWhat can Happen HOW to Prevent IT HazardRisk of Electrical Shock Risk from Flying ObjectsRisk to Breathing Risk of Falling Risk of Property Damage When Transporting CompressorRisk from Moving Parts Risk of BurnsModel No 919.727321 Specification ChartGeneral Information GlossaryDescription of Operation Tools Needed for AssemblyBREAK-IN Procedures AssemblyExtension Cords Operating ProceduresFilter Retainer MaintenanceProblem Cause Correction Troubleshooting GuideHave compressor checked at Sears Service Center Service and Repair Parts 919.727321 Garantie Complète DUN AN SUR LES Compresseurs Dair Sears Table DES MatièresMesures DE Sécurité Définitions Risque D’ÉCLATEMENT Mesures DE Sécurité ImportantesAvertissement Risque D’EXPLOSION OU D’INCENDIERisque DE Choc Électrique Prévention Risque DE Projection D’OBJETS PréventionRisque PAR Inhalation Prévention Risque DE Chute Risque Relié AUX Pièces MobilesRisque DE Brûlures De modèle 919.727321 Information GénéraleGlossaire Tableau DES SpécificationsOutils Nécessaires À L’ASSEMBLAGE Description DU FonctionnementProcédés DE Rodage AssemblageDirectives de rodage Mise EN MarcheRallonges Entretien Guide DE DÉ Pannage Problème Cause SolutionDu compresseur DE Modèle Entretien Pour Commander DES Pièces DE Rechange