Hobart Welding Products 125 manual Maintenance &TROUBLESHOOTING, Routine Maintenance, Months

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

SECTION 7 − MAINTENANCE &TROUBLESHOOTING

7-1. Routine Maintenance

! Disconnect power before maintaining.

. Maintain more often during severe condi- tions.

n = Check	Z = Change	~ = Clean	l = Replace
* To be done by Factory Authorized Service Agent

Reference

3 Months

lDamaged Or Unreadable Labels

lRepair Or Replace Cracked Weld Cable

~Clean And Tighten Weld Terminals

6 Months

~Inside Unit

7-2. Overload Protection

1 Supplementary Protector CB1

CB1 protects unit from overload. If

CB1 opens, unit shuts down.

Reset supplementary protector.

803 379-A

7-3. Drive Motor Protection

Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun trigger and wait until protection circuit resets allowing drive motor to feed wire again.

OM-947 Page 22

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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