Hobart Welding Products 125 manual From Hobart to You, Protect Your Investment

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Hobart is registered to the ISO 9001 Quality System Standard.

From Hobart to You

Thank you and congratulations on choosing Hobart. Now you can get the job done and get it done right. We know you don’t have time to do it any other way.

This Owner’s Manual is designed to help you get the most out of your Hobart products. Please take time to read the Safety precautions. They will help you protect yourself against potential hazards on the worksite.

We’ve made installation and operation quick and easy. With Hobart you can count on years of reliable service with proper maintenance.

And if for some reason the unit needs repair, there’s a Troubleshooting section that will help

you figure out what the problem is. The parts list will then help you to decide the exact part you may need to fix the problem. Warranty and service information for your particular model are also provided.

Hobart Welders manufactures a full line of welders and welding related equipment.

For information on other quality Hobart products, contact your local Hobart distributor to receive the latest full line catalog or individual specification sheets.

To locate your nearest distributor or service agency call 1-877-Hobart1 or visit our website at www.HobartWelders.com.

For Technical Help call 1-800-332-3281.

Hob_Thank 2009−09

Working as hard as you do − every power source from Hobart is backed by the best warranty in the business.

Protect Your Investment!

Register your product at:

HobartWelders.com

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Contents File Flux Cored Fcaw ProcessesDescription From Hobart to You Protect Your InvestmentTable of Contents 10-1 10-2Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can burnWelding can cause fire or explosion Fumes and Gases can be hazardousARC Rays can burn eyes and skin Flying Metal or Dirt can injure eyesFalling Equipment can injure Welding Wire can injureFire or Explosion hazard Moving Parts can injureEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings About Implanted Medical DevicesIndique des instructions spécifiques Symboles utilisésUNE Décharge Électrique peut entraîner la mort LE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peuvent être dangereux Risque D’INCENDIE OU LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLes Pièces Mobiles peuvent causer des blessures LE Soudage À L’ARC risque de provoquer des interférencesEn ce qui concerne les implants médicaux Principales normes de sécuritéInformations relatives aux CEM OM-947 Specifications − SpecificationsSymbols And Definitions − DefinitionsVolt-Ampere Curves WarrantyDuty Cycle And Overheating Can damage unit or gun and voidSlide insulating grips over handles Tools Needed OM-947 − InstallationInstalling Work Clamp Process/Polarity Table Changing PolarityInstalling Gas Supply Tools Needed 11/16, 1-1/8 Shielding GasOptional hub kit Installing Wire Spool And Adjusting Hub TensionOnly applies to units equipped with Serial Number And Rating Label Location Selecting a Location And Connecting 115 Volt Input PowerMake this installation SectionInstalling Contact Tip And Nozzle Turn off welding power sourceThreading Welding Wire Hold wire tightly to keep it from unravelingOperating The Gun − OperationControls LoadWeld Parameter Chart Overload Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Retaining Knob OpeningTurn Off power before replacing contact tip Replacing Gun Contact TipThread wire according to Cleaning Gun LinerHold wire tightly to keep it From unraveling. SecureTools Needed Head Tube Mm / 10 mm Remove black sleeving from end of replacement linerReplacing Gun Liner Tube. Separate gun handle halves10 mm Power source see Section Troubleshooting TableSecure power cord plug in receptacle see Section Trouble Remedy− Electrical Diagram Circuit DiagramTypical Gmaw MIG Process Connections − FCAW/GMAW Welding GuidelinesTypical Fcaw Process Connections Amperage Typical Control SettingsWire Size Amperage Range Select VoltageHolding And Positioning Welding Gun End View of Work AngleSlow Normal Conditions That Affect Weld Bead ShapeShort Normal Long Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Incomplete Fusion Troubleshooting − Excessive PenetrationTroubleshooting − Lack Of Penetration Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Base metal to moveApplication Troubleshooting Guide For Semiautomatic Welding EquipmentCommon Gmaw MIG Shielding Gases FilletGas hose in gun and cable assembly Gas nozzle plugged Clean or replace gas nozzleOpen gas valve at cylinder and adjust flow rate Loose or broken wires to gas solenoidConsumables − ACCESSORIES/CONSUMABLESAccessories PkgMaterial Thickness Reference Chart Work like a Pro Assistance ServiceSupport Contact your Distributor for Hobart Welding Products