Replacing Gun Contact Tip | Hobart Welding Products 250 manual

5-5. Replacing Gun Contact Tip

Y Turn Off power before replacing contact tip.

1 Nozzle

2 Contact Tip

Cut off welding wire at contact tip. Remove nozzle.

Remove contact tip and install new contact tip. Reinstall nozzle.

2

1

Tools Needed:

Ref. 800 797-C

OM-192 440 Page 26

Image 30

Hobart Welding Products 250 Replacing Gun Contact Tip, Turn Off power before replacing contact tip

Contents

Description OM-192 440WProcesses File MIG Gmaw From Hobart to You Table of Contents Warranty Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can kill Flying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or kill California Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers UNE Décharge Électrique peut entraîner la mort LES Fumées ET LES GAZ peuvent être dangereuxIndique un message de sécurité particulier DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer unIncendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures graves ’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessures Principales normes de sécurité En ce qui concerne les stimulateurs cardiaques Exceeding duty cycle can damage unit and void warranty SpecificationsWelding Power Source Duty Cycle And Overheating Overheating Welding Gun Duty Cycle And Overheating Volt-Ampere CurvesDefinition Installing Welding Gun Connecting To Weld Output Terminals Installing Work Clamp Setting Gun Polarity For Wire Type Installing Wire Spool And Adjusting Hub Tension Installing Gas Supply Rear Panel Positioning Jumper Links Volts Input Voltage Electrical Service GuideHz Single Min Grounding Conductor Size In AWG Selecting a Location And Connecting Input Power Threading Welding Wire Wood Turn Off unit, and disconnect input power Operation Connecting Spool Gun To Welding Power Source Turn Off unit − Operation Controls Voltage switch position Weld ParametersWhile welding To read settings Example 2/40 =Number on left of slash Supplementary Protectors Routine MaintenanceDisconnect power before maintaining Months Replacing Drive Roll And Wire Inlet Guide Turn Off powerRemoving Knob From Front Panel Turn Off power before replacing contact tip Replacing Gun Contact Tip Turn off welding power source/wire feeder Wire size stamped on tip − check and match wire size Replacing Switch And/Or Head Tube Wire Drive/Gun Trouble Remedy Welding Troubleshooting TableWire Drive/Gun Troubleshooting Table Welding Trouble Remedy − MIG Welding Gmaw Guidelines Typical MIG Process Connections Thickness to Amperage a Typical MIG Process Control SettingsWire Size Amperage Range Amperage Holding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Poor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective Actions Troubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − Distortion Common MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentWire does not feed Application Welding arc not stable Wire slipping in drive rolls OM-192 440 − Electrical Diagram − Parts List REGULATOR/FLOWMETER, 10−50 CFH ARGON/CO2 Center Baffle w/Components Center Baffle w/Components -1Item Rear Panel w/Components Front Panel w/Components M-25 Gun Optional Spool Gun Switch Description RemarksPage Service SupportAssistance Contact your Distributor for Hobart Welding Products