Hobart Welding Products OM-925 Installing Contact Tip And Nozzle, Turn off welding power source

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5-8. Installing Contact Tip And Nozzle

! Turn off welding power source.

1Nozzle Remove nozzle.

2Contact Tip

3Tip Adapter

Thread welding wire through gun (see Section 5-9).

Slide contact tip over wire and tighten tip into tip adapter.

Install nozzle.

MIG Nozzle (Standard)

Use with solid or flux cored wire.

Push nozzle over contact tip and adapter until it is seated onto adapter. End of contact tip will be flush with end of nozzle when installed properly.

Flux Nozzle (Optional)

Use with flux cored wire only. Narrow design allows access in tight spaces and provides better visibility of puddle during welding.

Push nozzle over contact tip and adapter until it is seated onto adapter. Contact tip will be exposed approximately 7/16 in (11.3 mm) when installed properly.

Tools Needed:

Ref. 802 399-A

OM-925 Page 19

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Contents OM-925217 694E 2008−10 Arc Welding Power Source Wire FeederProcesses DescriptionProtect Your Investment From Hobart to YouTable of Contents − ACCESSORIES/CONSUMABLES HOT Parts can cause severe burns 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 cause injury Welding Wire can cause injuryFire or Explosion hazard Falling Unit can cause injuryAbout Implanted Medical Devices Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationIndique des instructions spécifiques Symboles utilisésUNE Décharge Électrique peut entraîner la mort LE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux LA Chute DE L’APPAREIL peut blesser LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées Risque D’INCENDIE OU D’EXPLO- SionLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLES Fils DE Soudage peuvent provoquer des blessures En ce qui concerne les implants médicaux Principales normes de sécuritéInformation EMF OM-925 − Definitions − SpecificationsSymbols And Definitions SpecificationsCan damage unit or gun and void WarrantyDuty Cycle And Overheating Output Duty Cycle %10.0 100 110 120 130 140 150 160 Volt-Ampere CurvesVoltage 15.0Be sure that gun end is tight against drive assembly − InstallationInstalling Welding Gun Installing Work ClampChanging Polarity Process/Polarity TableDo not use Argon/Mixed gas regulator/flowmeter Installing Gas SupplyFeedhead Pressure Assembly Open Feedhead Pressure Assembly ClosedDo not move or operate unit Where it could tip Selecting a Location And Connecting Input PowerRetaining ring used with 8 in 203 mm spool only Installing Wire Spool And Adjusting Hub TensionAlign locking hole in spool with locking pin on spool hub Use with solid or flux cored wire Installing Contact Tip And NozzleTurn off welding power source Lay gun cable out straight Threading Welding WireHold wire tightly to keep it from unraveling Desired drive roll pressure. Start With a setting of 2 or 3 on the scalePressure Indicator Scale TightenControls Source or -2. Do not switch under load− Operation Material Thickness Reference Chart Weld Parameter Chart 217 618-A Drive Motor Protection − Maintenance & TroubleshootingRoutine Maintenance Overload ProtectionStamped Stamped .030/.035 Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip Replacing Gun Contact TipTo Reassemble Gun Cleaning Or Replacing Gun LinerDisconnect gun from unit Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableCircuit Diagram − Electrical DiagramRegulator Flowmeter Wire Feeder Power Source Shielding Gas− MIG Welding Gmaw Guidelines Typical MIG Process Connections125 in = 125 a Typical MIG Process Control SettingsWire Size Amperage Range 001 in = 1 ampereGroove Welds Holding And Positioning Welding GunSlow Normal Fast Conditions That Affect Weld Bead ShapePush Perpendicular Drag Short Normal LongGun 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 sourceConsumables − ACCESSORIES/CONSUMABLESAccessories Replacement Drive RollsAssistance ServiceSupport Hobart Welding Products Contact your Distributor for