Hobart Welding Products OM-198 683C manual Replacing Switch And/Or Head Tube, Disconnect gun first

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4-8. Replacing Switch And/Or Head Tube

Y Disconnect gun first.

1Remove handle locking nut.

3 Slide handle.

2 Remove switch housing. Note: If installing new switch, push switch lead connectors onto terminal of new switch (polarity is not important). Install switch back into handle, and secure with handle locking nut. If replacing head tube, continue to end of figure.

4Secure head tube in vice.

5 Loosen jam nut. Remove from vice and turn head tube out by hand.

6Install existing shock washer onto new head tube. Hand-tighten head tube into connector cable.

7Place head tube in vice and tighten until nuts are tight.

8Remove from vice. Reposition handle and install switch housing. Secure with handle locking nut.

Tools Needed:

3/4 in

Ref. ST-800 795-C

OM-198 683 Page 24

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Contents Processes OM-198 683CDescription From Hobart to You Table of Contents Page Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersSignification des symboles Consignes DE Securite Lire Avant UtilisationUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un incendie ou une explosionLE Bruit peut affecter l’ouïe Risque D’INCENDIE OU LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresInformation sur les champs é lectromagné tiques Principales normes de sé curitéConsignes relatives aux stimulateurs cardiaques Installation SpecificationsWelding Power Source Duty Cycle And Overheating Exceeding duty cycle can damage unit and void warrantyVolt-Ampere Curves Welding Gun Duty Cycle And OverheatingDefinition Installing Welding Gun Installing Work ClampConnecting Olympic 30A Gun Setting Gun Polarity For Wire Type Installing Gas SupplyInstalling Wire Spool and Adjusting Hub Tension Positioning Jumper LinksElectrical Service Guide Selecting a Location And Connecting Input PowerThreading Welding Wire ScaleWeld Parameter 196 Operation ControlsVoltmeter And Wire Feed Speed Meter Operation Power Up StatusError Message Welding StatusMaintenance &TROUBLESHOOTING Routine MaintenanceCircuit Breaker CB1 Unit OverloadTurn Off power Changing Drive Roll and Wire Inlet GuideReplacing Gun Contact Tip Aligning Drive Rolls and Wire Guide Disconnect gun from unit first Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube Disconnect gun firstTroubleshooting Trouble RemedyOM-198 683 Electrical Diagram Circuit DiagramParts List Main AssemblyDia Part Description Mkgs Quantity Baffle, Center w/Components Baffle, Center w/Components -1 Item M-25 Gun M-25 Gun -1 Item Panel, Front w/Components -1 Item Wire Drive And Gears -2 Item Wire Drive And GearsDrive Roll And Wire Guide Kits Panel, Rear w/Components -1 ItemPage Page Service SupportContact your Distributor for Hobart Welding Products