Miller Electric OM-1313 Replacing Switch And/Or Head Tube, Remove handle locking nut Slide handle

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4-5. 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-1313 Page 18

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Contents September Arc Welding Power Source Wire FeederVisit our website at MIG Gmaw Welding Flux Cored Fcaw WeldingFrom Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message OM-1313ARC Rays can burn eyes and skin Principal Safety Standards Fire or Explosion hazardEMF Information About PacemakersSpecifications InstallationVolt-Ampere Curves Welding Gun Duty Cycle And Overheating Welding Power Source Duty Cycle And OverheatingExceeding duty cycle can damage unit and void warranty OverheatingInstalling Work Clamp Installing Gas SupplyPolarity Changeover Label Installing Welding GunSetting Gun Polarity Tools Needed 11/16Reinstall wrapper Tools Needed 7/16 Installing Wire Spool And Adjusting Hub TensionTurn Off unit, and disconnect input power Changing Input VoltageInput Voltage Electrical Service GuideSelecting a Location And Connecting Input Power Min Grounding Conductor Size In AWG/KcmilThreading Welding Wire OM-1313 Front Panel Controls OperationControls For Standard Units Weld Parameter Chart Higher e.g Volts AC Lower e.g Volts ACOM-1313 Routine Maintenance Maintenance & TroubleshootingMonths Head Tube Remove nozzle, contact tip, and adapter Cleaning Or Replacing Gun LinerDisconnect gun first Blow out gun casing Remove linerReplacing Switch And/Or Head Tube Remove handle locking nut Slide handleReplacing Gun Contact Tip TroubleshootingSee Section Electrical Diagram Circuit DiagramTypical MIG Process Connections Wire Feeder Power Source Gun Work Clamp WorkpieceMIG Welding Gmaw Guidelines Shielding Gas Regulator/ FlowmeterSelect Wire Size Typical MIG Process Control SettingsWire Recommendation Wire Speed Select VoltageHolding And Positioning Welding Gun Perpendicular Drag Conditions That Affect Weld Bead ShapePush Short Normal LongGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting Excessive Penetration Troubleshooting Excessive SpatterTroubleshooting Porosity Possible Causes Corrective ActionsTroubleshooting 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 Welding power source Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Drive rolls if necessaryOM-1313 Parts List Main AssemblyDia Part Mkgs Description Quantity Center Baffle w/Components Baffle, Center w/Components -1 Item M-15 Gun -1 Item Includes ItemsPage Your distributor also gives ServiceSupport Owner’s Record