Hobart Welding Products 210 MVP manual Nozzle Contact Tip Tip Adapter Head Tube

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7-5. Changing Nozzle, Contact Tip, Adapter And Liner, And Cleaning Gun Casing

2 3

! Turn off welding power source.

1Nozzle

2Contact Tip

3Tip Adapter

Head Tube

.Wire size stamped on tip − check and match wire size.

8 mm

Remove nozzle, contact tip, and adapter.

Blow out gun casing.

5/8 in. (16 mm)

Liner

Stickout

Tools Needed:

8 mm, 10 mm

Cut off wire and disconnect gun from feeder.

Unscrew and remove liner.

Lay gun cable out straight before installing new liner.

10 mm

Reassemble gun in reverse order from taking it apart.

Install

Liner

.Thread wire according to

welding power source/wire feeder manual.

243 839-A

OM-249 498 Page 31

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Contents File MIG Gmaw OM-249 498BProcesses DescriptionProtect Your Investment From Hobart to YouTable of Contents Warranty HOT Parts can burn Symbol UsageArc Welding Hazards Electric Shock can killFlying Metal or Dirt can injure eyes Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosionMoving Parts can injure Welding Wire can injureFire or Explosion hazard Falling Equipment can injureAbout Implanted Medical Devices Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationUNE Décharge Électrique peut entraîner la mort Symboles utilisésLE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peuvent être dangereux LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées Risque D’INCENDIE OULE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLes Pièces Mobiles peuvent causer des blessures LES Fils DE Soudage peuvent provoquer des blessuresEn ce qui concerne les implants médicaux Principales normes de sécuritéInformations relatives aux CEM OM-249 498 I1eff Symbols And Definitions− Definitions I1maxSpecifications For 115 VAC − SpecificationsSpecifications For 230 VAC Overheating Duty Cycle And Overheating30% duty cycle at 150 amps Minutes Welding 20% duty cycle at 90 amps Minutes WeldingVoltage Amperage Volt-Ampere CurvesInstalling Welding Gun − InstallationInstalling Nozzle, Contact Tip, And Adapter Installing Work Clamp Changing Polarity Turn off welding power sourceProcess/Polarity Table Tools Needed 1-1/8 Installing Gas SupplyAfter flow is set, close pressure assembly Extension Cord Data Use Shortest Cord Possible Electrical Service GuideMulti−Voltage Plug MVP Connection Serial Number And Rating Label Location Selecting a Location And Connecting Input PowerDo not move or operate Unit where it could tip Do Not modify or rewire receptacle ConnectionYellow InstallationLocal Codes − have only Qualified Persons MakeConnecting 1-Phase Input Power For 115 VAC Input Installing 8 in mm Wire Spool Installing Wire Spool And Adjusting Hub TensionExposed O-rings Connecting Optional Spool GunWire Feed Speed Control Threading Welding Wire Controls − OperationWeld Parameter Chart Drive Motor Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload ProtectionStamped Changing Drive Roll Or Wire Inlet Guide023/.025 030/.035 Groove Knurled SmoothStickout Tools Needed Mm, 10 mm Nozzle Contact Tip Tip Adapter Head TubeRemove nozzle, contact tip, and adapter Blow out gun casing Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableCircuit Diagram − Electrical Diagram249 315-A Gun Workpiece Work Clamp Regulator Flowmeter Shielding Gas Wire Feeder Power Source− MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsSelect Voltage Typical MIG Process Control SettingsWire Size Amperage Range Groove Welds Holding And Positioning Welding GunShort Normal Long Conditions That Affect Weld Bead ShapePush Perpendicular DragGun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Direction Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Base metal to moveApplication Troubleshooting Guide For Semiautomatic Welding EquipmentCommon MIG Shielding Gases Drive rolls if necessary Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Welding power source49 32 − Parts List57 58 Dia Part Description Quantity Optional 245 H100S4-10 GunConsumables Optional Drive RollsOptions Assistance ServiceSupport Hobart Welding Products Contact your Distributor for