Hobart Welding Products OM-925 217 694A Cleaning Or Replacing Gun Liner, Disconnect gun from unit

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6-6. Cleaning Or Replacing Gun Liner

Head Tube

8 mm

Tools Needed:

YDisconnect gun from unit.

8 mm / 10mm

Remove nozzle, contact tip, adapter, gas diffuser, and wire outlet guide.

10 mm

Remove liner.

Lay gun cable out straight before installing new liner.

		To Reassemble Gun:
		Insert new liner.
		Install wire outlet guide so that 1/8
		in (3 mm) of liner sticks out. Hand
		tighten outlet guide, and then
	Blow out gun casing.	tighten two full turns more.
	Blow out gun casing.	Cut liner off so that 3/4 in (19 mm)
		Cut liner off so that 3/4 in (19 mm)
		sticks out of head tube.
		Install gas diffuser, adapter, contact
		tip, and nozzle.

Ref. 802 446

OM-925 Page 26

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Contents OM-925 ProcessesDescription From Hobart to You Table of Contents Options and Accessories Warranty 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 Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant UtilisationLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LE Bruit peut affecter l’ouïe’EMPLOI Excessif peut Faire Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser LES Pièces Mobiles peuvent cau- ser des blessuresPrincipales normes de sécurité Information sur les champs électromagnétiquesConsignes relatives aux stimulateurs cardiaques − Specifications SpecificationsVAC Model Output Duty Cycle % Duty Cycle And OverheatingAmperes VAC Model Output AmperesVolt-Ampere Curves Voltage− Installation Installing Welding Gun Installing Work ClampProcess/Polarity Table Changing PolarityInstalling Gas Supply Is required Do not move or operate unit where it could tip = GND/PEElectrical Service Guide For 230 VAC Model Installing Wire Spool And Adjusting Hub TensionThreading Welding Wire Hold wire tightly to keep it From unraveling− Operation ControlsWeld Parameter Chart For 115 VAC Model Steel20 ga 18 ga 16 ga 11 ga InchWeld Parameter Chart For 230 VAC Model Wire Welding Package 18 ga 16 ga 11 ga 048 060 InchDisconnect power before maintaining − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Cleaning Or Replacing Gun Liner Disconnect gun from unitTo Reassemble Gun Replacing Switch And/Or Head Tube Troubleshooting Table Trouble Remedy− Electrical Diagram Circuit Diagram For 115 VAC ModelCircuit Diagram For 230 VAC Model − 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 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 ActionsTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − DistortionTroubleshooting Guide For Semiautomatic Welding Equipment Common MIG Shielding GasesApplication Welding arc not stable Wire slipping in drive rolls Return To Table Of Contents − Parts List Main AssemblyDia Part H-10 Gun Optional Drive Rolls Options195 Page Service SupportContact your Distributor for Hobart Welding Products