Hobart Welding Products 140 manual Installing Gas Supply, CO2 gas regulator/flowmeter

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

5-5. Installing Gas Supply

1

. DO NOT use Argon/Mixed gas regulator/flowmeter

with CO2 shielding gas. See Parts List for optional

Obtain gas cylinder and chain to running gear, wall, or other stationary support so cylinder cannot fall and break off valve.

1	Cap
2	Cylinder Valve

CO2 gas regulator/flowmeter.

7

4

2

3

Remove cap, stand to side of valve, and open valve slightly. Gas flow blows dust and dirt from valve. Close valve.

3Cylinder

4Regulator/Flowmeter

Install so face is vertical.

5Regulator/Flowmeter Gas Hose Connection

6Welding Power Source Gas Hose Connection

5

Argon Gas Or

Mixed Gas

6

Connect supplied gas hose between regulator/flowmeter gas hose connection, and fitting on rear of welding power source.

7 Flow Adjust

Flow rate should be set when gas is flowing through welding power source and welding gun. Open feedhead pressure assembly so that wire will not feed. Press gun trigger to start gas flow.

Typical flow rate is 20 cfh (cubic feet per hour). Check wire manufacturer’s recommended flow rate.

After flow is set, close feedhead pressure assembly.

Tools Needed:

5/8, 1-1/8 in

Feedhead Pressure Assembly Open

Feedhead Pressure Assembly Closed

Ref. 804 654-A / 802 441 / Ref. 804 623-A

OM-925 Page 14

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Contents OM-925 ProcessesDescription From Hobart to You Table of Contents − ACCESSORIES/CONSUMABLES − MIG Welding Gmaw GuidelinesTypical MIG Process Connections Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia 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 Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux LE Bruit peut endommager l’ouïe’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresBoulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone En ce qui concerne les stimulateurs cardiaquesSpecifications − SpecificationsSymbols And Definitions − DefinitionsOutput Duty Cycle % WarrantyDuty Cycle And Overheating Exceeding duty cycle can15.0 Volt-Ampere CurvesVoltage 10.0 100 110 120 130 140 150 160Installing Work Clamp − InstallationInstalling Welding Gun Drive assembly. Tighten thumbscrewProcess/Polarity Table Changing PolarityInstalling Gas Supply CO2 gas regulator/flowmeterSelecting a Location And Connecting Input Power Do not move or operate unit Where it could tipInstalling Wire Spool And Adjusting Hub Tension Align locking hole in spool with locking pin on spool hubInstalling Contact Tip And Nozzle Turn off welding power sourceUse with solid or flux cored wire Threading Welding Wire Lay gun cable out straightPressure Indicator Scale TightenSource or -2. Do not switch under load − OperationControls Material Thickness Reference Chart Weld Parameter Chart 217 618-A Disconnect power − Maintenance & TroubleshootingRoutine Maintenance Overload Protection Drive Motor ProtectionReplacing Gun Contact Tip Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip Tools Needed 030/.035 GrooveCleaning Or Replacing Gun Liner Disconnect gun from unitTo Reassemble Gun Replacing Switch And/Or Head Tube Remove handle locking nut Secure head tube in viceSlide handle Troubleshooting Table Trouble Remedy− Electrical Diagram Circuit Diagram− MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsThickness to Amperage a Typical MIG Process Control SettingsWire Size Amperage Range Select VoltageHolding And Positioning Welding Gun Perpendicular Drag Conditions That Affect Weld Bead ShapePush Short Normal LongPoor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective ActionsTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − DistortionWeld bead Troubleshooting Guide For Semiautomatic Welding Equipment Common MIG Shielding GasesApplication Welding power source Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Drive rolls if necessaryReplacement Drive Rolls − ACCESSORIES/CONSUMABLESAccessories ConsumablesWork like a Pro Start Your Professional Service SupportAssistance Contact your Distributor for Hobart Welding Products