Hobart Welding Products 125 manual Troubleshooting Table, Trouble Remedy, Connections

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.A complete Parts List is available at www.HobartWelders.com

7-8. Troubleshooting Table

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trouble

 

 

 

Remedy

 

 

No weld output; wire does not feed; fan

Secure power cord plug in receptacle (see Section 5-7).

does not run.

 

 

 

 

Replace building line fuse or reset circuit breaker if open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Place Power switch in On position (see Section 6-1).

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset welding power source supplementary protector if open.

 

 

No weld output; wire does not feed; fan

Thermostat TP1 open (overheating). Allow fan to run with gun trigger switch off; thermostat closes when

motor continues to run.

unit has cooled (see Section 4-2).

 

 

 

 

 

 

 

 

 

 

 

 

 

Be sure that Voltage switch is not set between ranges (see Section 6-1).

 

 

 

 

 

 

 

 

 

 

 

 

 

Disassemble torch handle and check trigger switch lead connections, tighten or reconnect any loose

 

 

 

 

 

 

connections.

 

 

No weld output; wire feeds.

Connect work clamp to get good metal to metal contact.

 

 

 

 

 

 

 

 

 

 

 

 

 

Check cable connection at work clamp and tighten hardware, if necessary (see Section 5-1).

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace contact tip (see Section 7-5).

 

 

 

 

 

 

 

 

 

 

 

 

 

Check for proper polarity connections (see Section 5-3).

 

 

Low weld output.

Connect unit to proper input voltage or check for low line voltage.

 

 

 

 

 

 

 

 

 

 

 

 

 

Place voltage switch in desired position (see Section 6-1).

 

 

 

 

 

 

 

 

 

 

 

 

 

If using an extension cord, check that wire size and length is the proper size for power rating of welding

 

 

 

 

 

 

power source (see Section 4-1).

 

 

Electrode wire feeding stops during

Straighten gun cable and/or replace damaged parts.

welding.

 

 

 

 

Adjust drive roll pressure (see Section 5-9).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Change to proper drive roll groove (see Section 7-4).

 

 

 

 

 

 

 

 

 

 

 

 

 

Readjust hub tension (see Section 5-5).

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace contact tip if blocked (see Section 7-5).

 

 

 

 

 

 

 

 

 

 

 

 

 

Clean or replace wire inlet guide or liner if dirty or plugged (see Section 7-4).

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace drive roll or pressure bearing if worn or slipping (see Section 7-4).

 

 

 

 

 

 

 

 

 

 

 

 

 

Check and clear any restrictions at drive assembly and liner (see Section 7-6).

 

 

 

 

 

 

 

 

 

 

 

 

 

Release gun trigger and allow gun and motor protection circuitry to reset.

 

 

 

 

 

 

 

 

 

 

 

 

 

Have nearest Factory Authorized Service Agent check drive motor.

 

 

 

 

 

 

 

 

 

 

OM-947 Page 28

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Contents File Flux Cored Fcaw ProcessesDescription From Hobart to You Protect Your InvestmentTable of Contents 10-1 10-2Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can burnFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can injure Fire or Explosion hazardFalling Equipment can injure Moving Parts can injurePrincipal Safety Standards California Proposition 65 WarningsEMF Information 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 LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresProposition californienne 65 Avertissements Les Pièces Mobiles peuvent causer des blessuresLES Fils DE Soudage peuvent provoquer 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 Symbols And DefinitionsSpecifications − DefinitionsWarranty Duty Cycle And OverheatingVolt-Ampere Curves 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 Selecting a Location And Connecting 115 Volt Input Power Make this installationSerial Number And Rating Label Location SectionInstalling Contact Tip And Nozzle Turn off welding power sourceThreading Welding Wire Hold wire tightly to keep it from unraveling− Operation ControlsOperating The Gun LoadWeld Parameter Chart − Maintenance &TROUBLESHOOTING Routine MaintenanceOverload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Retaining Knob OpeningTurn Off power before replacing contact tip Replacing Gun Contact TipCleaning Gun Liner Hold wire tightly to keep itThread wire according to From unraveling. SecureRemove black sleeving from end of replacement liner Replacing Gun LinerTools Needed Head Tube Mm / 10 mm Tube. Separate gun handle halves10 mm Troubleshooting Table Secure power cord plug in receptacle see SectionPower source see Section Trouble Remedy− Electrical Diagram Circuit DiagramTypical Gmaw MIG Process Connections − FCAW/GMAW Welding GuidelinesTypical Fcaw Process Connections Typical Control Settings Wire Size Amperage RangeAmperage 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 − Burn-Through Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Base metal to moveTroubleshooting Guide For Semiautomatic Welding Equipment Common Gmaw MIG Shielding GasesApplication FilletGas nozzle plugged Clean or replace gas nozzle Open gas valve at cylinder and adjust flow rateGas hose in gun and cable assembly Loose or broken wires to gas solenoid− ACCESSORIES/CONSUMABLES AccessoriesConsumables PkgMaterial Thickness Reference Chart Work like a Pro Assistance ServiceSupport Contact your Distributor for Hobart Welding Products
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