Maintenance &TROUBLESHOOTING, Months | Hobart Welding Products 175

SECTION 6 − MAINTENANCE &TROUBLESHOOTING

6-1. Routine Maintenance

Y Disconnect power before maintaining.

3 Months

Replace unreadable labels.

Repair or replace cracked weld cable.

Clean and tighten weld terminals.

6 Months

Blow out or vacuum inside.

During heavyOr service, clean

monthly.

6-2. Overload Protection

1

6-3. Drive Motor Protection

1 Circuit Breaker CB1

CB1 protects unit from overload. If CB1 opens, unit shuts down.

Reset breaker.

802 441

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-944 Page 24

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Hobart Welding Products 175 Maintenance &TROUBLESHOOTING, Routine Maintenance, Overload Protection Drive Motor Protection

Contents

Processes OM-944Description From Hobart to You Table of Contents Options and Accessories Warranty Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can kill ARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or kill California Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant Utilisation LE Soudage peut causer un incen- die ou une explosion LES Particules Projetées peu- vent blesser les yeuxLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Bruit peut affecter l’ouïe Risque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut Faire LES Pièces Mobiles peuvent cau- ser des blessures Information sur les champs électromagnétiques Principales normes de sécuritéConsignes relatives aux stimulateurs cardiaques Specifications − SpecificationsVAC Model Duty Cycle And Overheating OutputDuty Cycle % Output Amperes Volt-Ampere Curves Load Amps − Installation Installing Welding Gun Installing Work Clamp Process/Polarity Table Changing Polarity Installing Gas Supply Rating Label Do not move or operate unit where it could tip = GND/PE Electrical Service Guide For 230 VAC Model Installing Wire Spool And Adjusting Hub Tension Threading Welding Wire Hold wire tightly to keep it from unraveling − Operation Controls Weld Parameter Chart For 115 VAC Model Welding Guide For 115 Volt Wire Welding Package Weld Parameter Chart For 230 VAC Model For 230 Volt Wire Welding Package − Maintenance &TROUBLESHOOTING Routine MaintenanceDisconnect power before maintaining Overload Protection Drive Motor Protection Turn Off power before replacing contact tip Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Disconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube Troubleshooting Table Trouble Remedy − Electrical Diagram Circuit Diagram For 115 VAC Model Circuit Diagram For 230 VAC Model − MIG Welding Gmaw Guidelines Typical MIG Process Connections Typical MIG Process Control Settings Wire Size Amperage RangeThickness to Amperage a Select Voltage Holding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective Actions Troubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − Distortion Common MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Welding arc not stable Wire slipping in drive rolls Return To Table Of Contents − Parts List Main Assembly Dia Part H-10 Gun Options Optional Drive Rolls195 Page Service Support Contact your Distributor for Hobart Welding Products