Hobart Welding Products 250 installation instructions Turn off welding power source/wire feeder

Page 31

5-6. Removing Nozzle, Contact Tip, And Adapter, Changing Liner, And Cleaning Gun Casing

2	3	4
	3

		Head
1		Tube
1

7/16 in

5/8 in

Remove nozzle, contact tip, and adapter.

Blow out gun casing.

3/4 in

(20 mm)

Liner

Stickout

Tools Needed:

5/8, 7/16 in

YTurn off welding power source/wire feeder.

1Nozzle

2Contact Tip

3Tip Adapter

4Nozzle Adapter

.Wire size stamped on tip − check and match wire size.

Cut off wire and disconnect gun from feeder.

Unscrew and remove liner.

Lay gun cable out straight before installing new liner.

Reassemble gun in reverse order from taking it apart.

Install

Liner

.Thread wire according to

welding power source/wire feeder manual.

804 466-A

OM-192 440 Page 27

Image 31

Contents File MIG Gmaw OM-192 440WProcesses DescriptionFrom Hobart to You Table of Contents Warranty Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux UNE Décharge Électrique peut entraîner la mortIndique un message de sécurité particulier DES Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer unIncendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut SUREn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéOverheating SpecificationsWelding Power Source Duty Cycle And Overheating Exceeding duty cycle can damage unit and void warrantyVolt-Ampere Curves Welding Gun Duty Cycle And OverheatingDefinition Installing Welding Gun Installing Work Clamp Connecting To Weld Output TerminalsInstalling Wire Spool And Adjusting Hub Tension Setting Gun Polarity For Wire TypeRear Panel Installing Gas SupplyVolts Positioning Jumper LinksMin Grounding Conductor Size In AWG Electrical Service GuideHz Single Input VoltageSelecting a Location And Connecting Input Power Wood Threading Welding WireOperation Turn Off unit, and disconnect input powerTurn Off unit Connecting Spool Gun To Welding Power SourceControls − OperationWeld Parameters Voltage switch positionWhile welding Example 2/40 = To read settingsNumber on left of slash Months Routine MaintenanceDisconnect power before maintaining Supplementary ProtectorsTurn Off power Replacing Drive Roll And Wire Inlet GuideRemoving Knob From Front Panel Replacing Gun Contact Tip Turn Off power before replacing contact tipWire size stamped on tip − check and match wire size Turn off welding power source/wire feederReplacing Switch And/Or Head Tube Welding Trouble Remedy Welding Troubleshooting TableWire Drive/Gun Troubleshooting Table Wire Drive/Gun Trouble RemedyTypical MIG Process Connections − MIG Welding Gmaw GuidelinesAmperage Typical MIG Process Control SettingsWire Size Amperage Range Thickness to Amperage aHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Distortion Troubleshooting − Waviness Of BeadApplication Troubleshooting Guide For Semiautomatic Welding EquipmentWire does not feed Common MIG Shielding GasesWelding 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 Description Remarks Optional Spool Gun SwitchPage Support ServiceAssistance Hobart Welding Products Contact your Distributor for