Hobart Welding Products 125 Gas cylinder empty Replace empty gas cylinder, Welding power source

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Problem

Probable Cause

Remedy

 

 

 

Wire feeds, but no gas flows

Gas cylinder empty.

Replace empty gas cylinder.

(GMAW).

 

 

Gas nozzle plugged.

Clean or replace gas nozzle.

 

 

 

 

 

Gas cylinder valve not open or flowmeter not adjusted.

Open gas valve at cylinder and adjust flow rate.

 

 

 

 

Restriction in gas line.

Check gas hose between flowmeter and wire feeder, and

 

 

gas hose in gun and cable assembly.

 

 

 

 

Loose or broken wires to gas solenoid.

Have Factory Authorized Service Agent repair wiring.

 

 

 

 

Gas solenoid valve not operating.

Have Factory Authorized Service Agent replace gas

 

 

solenoid valve.

 

 

 

 

Incorrect primary voltage connected to welding power

Check primary voltage and relink welding power source

 

source.

for correct voltage.

 

 

 

Welding arc not stable.

Wire slipping in drive rolls.

Adjust pressure setting on wire feed rolls. Replace worn

 

 

drive rolls if necessary.

 

 

 

 

Wrong size gun liner or contact tip.

Match liner and contact tip to wire size and type.

 

 

 

 

Incorrect voltage setting for selected wire feed speed on

Readjust welding parameters.

 

welding power source.

 

 

 

 

 

Loose connections at the gun weld cable or work cable.

Check and tighten all connections.

 

 

 

 

Gun in poor shape or loose connection inside gun.

Repair or replace gun as necessary.

 

 

 

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Contents Description ProcessesFile Flux Cored Fcaw Protect Your Investment From Hobart to YouTable of Contents 10-2 10-1HOT 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 utilisésIndique des instructions spécifiques LES Fumées ET LES GAZ peuvent être dangereux LES Pièces Chaudes peuvent provoquer des brûluresLE Soudage peut provoquer un incendie ou une explosion 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 blessuresInformations relatives aux CEM Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-947 − Definitions − SpecificationsSymbols And Definitions SpecificationsCan damage unit or gun and void WarrantyDuty Cycle And Overheating Volt-Ampere CurvesInstalling Work Clamp − InstallationSlide insulating grips over handles Tools Needed OM-947 Changing Polarity Process/Polarity TableTools Needed 11/16, 1-1/8 Shielding Gas Installing Gas SupplyOnly applies to units equipped with Installing Wire Spool And Adjusting Hub TensionOptional hub kit Section Selecting a Location And Connecting 115 Volt Input PowerMake this installation Serial Number And Rating Label LocationTurn off welding power source Installing Contact Tip And NozzleHold wire tightly to keep it from unraveling Threading Welding WireLoad − OperationControls Operating The GunWeld Parameter Chart Drive Motor Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload ProtectionRetaining Knob Opening Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Turn Off power before replacing contact tipFrom unraveling. Secure Cleaning Gun LinerHold wire tightly to keep it Thread wire according toTube. Separate gun handle halves Remove black sleeving from end of replacement linerReplacing Gun Liner Tools Needed Head Tube Mm / 10 mm10 mm Trouble Remedy Troubleshooting TableSecure power cord plug in receptacle see Section Power source see SectionCircuit Diagram − Electrical DiagramTypical Fcaw Process Connections − FCAW/GMAW Welding GuidelinesTypical Gmaw MIG Process Connections Select Voltage Typical Control SettingsWire Size Amperage Range AmperageEnd View of Work Angle Holding And Positioning Welding GunShort Normal Long Conditions That Affect Weld Bead ShapeSlow Normal Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Porosity Troubleshooting − Excessive SpatterPossible Causes Corrective Actions Troubleshooting − Lack Of Penetration Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Base metal to move Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Troubleshooting − DistortionFillet Troubleshooting Guide For Semiautomatic Welding EquipmentCommon Gmaw MIG Shielding Gases ApplicationLoose or broken wires to gas solenoid Gas nozzle plugged Clean or replace gas nozzleOpen gas valve at cylinder and adjust flow rate Gas hose in gun and cable assemblyPkg − ACCESSORIES/CONSUMABLESAccessories ConsumablesMaterial Thickness Reference Chart Work like a Pro Support ServiceAssistance Hobart Welding Products Contact your Distributor for
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