Hobart Welding Products 125 manual Changing Drive Roll Or Wire Inlet Guide, Retaining Knob Opening

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

7-4. Changing Drive Roll Or Wire Inlet Guide

2

1

7

6 5

3 4

1Pressure Adjustment Knob

2Pressure Assembly

Pivot pressure adjustment knob down, and lift pressure assembly up.

3Pivot Tube Plate

4Securing Screws

5Pressure Arm Pivot Tube

6Inlet Wire Guide

Remove screws and pivot tube plate. Lift out pressure arm pivot tube, and slide inlet wire guide out of tube.

Slide replacement wire guide into tube, and place tube back into drive assembly. Be sure tip of wire guide is as close to drive roll as possible without touching.

Reinstall plate and tighten screws. 7 Retaining Knob

Rotate counterclockwise and remove knob.

8 Drive Roll

The drive roll consists of two different sized grooves. Each side is stamped with the proper size.

Select the groove that matches the wire size on the wire spool. Install drive roll onto motor shaft so that correct groove size stamp faces out away from drive housing.

9 Retaining Knob Opening

Install retaining knob by placing opening over drive roll (opening faces rear of unit). Rotate retaining knob clockwise to secure drive roll.

Position wire into outer groove of drive roll (see Section 5-9).

.030/.035

VK

Groove

Stamped .030/.035

Tools Needed:

5/16 in.

.024 Groove

Stamped .024

8

9

Ref. 802 444-B / 803 442-A

OM-947 Page 23

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Contents Processes DescriptionFile 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 InformationSymboles utilisés UNE Décharge Électrique peut entraîner la mortIndique des instructions spécifiques LES Pièces Chaudes peuvent provoquer des brûlures LES Fumées ET LES GAZ peuvent être dangereuxLE 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 blessuresPrincipales normes de sécurité Informations relatives aux CEMEn 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 Curves− Installation Installing Work ClampSlide insulating grips over handles Tools Needed OM-947 Changing Polarity Process/Polarity TableTools Needed 11/16, 1-1/8 Shielding Gas Installing Gas SupplyInstalling Wire Spool And Adjusting Hub Tension Only applies to units equipped withOptional 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 Diagram− FCAW/GMAW Welding Guidelines Typical Fcaw Process ConnectionsTypical Gmaw MIG Process Connections Select Voltage Typical Control SettingsWire Size Amperage Range AmperageEnd View of Work Angle Holding And Positioning Welding GunConditions That Affect Weld Bead Shape Short Normal LongSlow Normal Poor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityPossible Causes Corrective Actions Troubleshooting − Excessive Penetration Troubleshooting − Lack Of 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 Service SupportAssistance Hobart Welding Products Contact your Distributor for