Hobart Welding Products 140 manual Replacing Switch And/Or Head Tube, Slide handle

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.A complete Parts List is available at www.HobartWelders.com

7-7. Replacing Switch And/Or Head Tube

1 Remove handle locking nut.

4 Secure head tube in vice.

YTurn Off welding power source /wire feeder and disconnect gun.

3

Slide handle.

2 Remove switch

housing. Install new switch and

connect leads (polarity is not important). Reassemble in reverse order. If replacing head tube, continue to end of figure.

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

6Hand-tighten head tube into cable connector.

7 Place 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:

19 mm

Ref. 800 795-C

OM-925 Page 27

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Contents Processes OM-925Description From Hobart to You Table of Contents − MIG Welding Gmaw Guidelines − ACCESSORIES/CONSUMABLESTypical MIG Process Connections Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux UNE Décharge Électrique peut entraîner la mortIndique un message de sécurité particulier LE Bruit peut endommager l’ouïe LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesDES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut SUREn ce qui concerne les stimulateurs cardiaques Boulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone− Definitions − SpecificationsSymbols And Definitions SpecificationsExceeding duty cycle can WarrantyDuty Cycle And Overheating Output Duty Cycle %10.0 100 110 120 130 140 150 160 Volt-Ampere CurvesVoltage 15.0Drive assembly. Tighten thumbscrew − InstallationInstalling Welding Gun Installing Work ClampChanging Polarity Process/Polarity TableCO2 gas regulator/flowmeter Installing Gas SupplyDo not move or operate unit Where it could tip Selecting a Location And Connecting Input PowerAlign locking hole in spool with locking pin on spool hub Installing Wire Spool And Adjusting Hub TensionTurn off welding power source Installing Contact Tip And NozzleUse with solid or flux cored wire Lay gun cable out straight Threading Welding WireTighten Pressure Indicator Scale− Operation Source or -2. Do not switch under loadControls Material Thickness Reference Chart Weld Parameter Chart 217 618-A Overload Protection Drive Motor Protection − Maintenance & TroubleshootingRoutine Maintenance Disconnect powerTools Needed 030/.035 Groove Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip Replacing Gun Contact TipDisconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Remove handle locking nut Secure head tube in vice Replacing Switch And/Or Head TubeSlide handle Trouble Remedy Troubleshooting TableCircuit Diagram − Electrical DiagramTypical MIG Process Connections − MIG Welding Gmaw GuidelinesSelect Voltage Typical MIG Process Control SettingsWire Size Amperage Range Thickness to Amperage aHolding And Positioning Welding Gun Short Normal Long Conditions That Affect Weld Bead ShapePush Perpendicular DragGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Distortion Troubleshooting − Waviness Of BeadWeld bead Common MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Drive rolls if necessary Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Welding power sourceConsumables − ACCESSORIES/CONSUMABLESAccessories Replacement Drive RollsWork like a Pro Start Your Professional Support ServiceAssistance Hobart Welding Products Contact your Distributor for
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