Hobart H-9B, 125 EZ manual Replacing Gun Liner, End of wire at spool

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6-7. Replacing Gun Liner

			Y Turn off welding power source.
			Tools Needed:
	1	Head	8 mm / 10 mm
	1	Tube	+ −
		Tube	+ −
		2
		3

8 mm

Remove nozzle. Cut off wire	Open pressure assembly. Retract	. Hold wire tightly to keep it
at contact tip, and remove	wire from liner onto spool.	from unraveling. Secure
contact tip and tip adapter.		from unraveling. Secure
contact tip and tip adapter.		end of wire at spool.
		end of wire at spool.

+ −

Remove screws (3) from cover, and remove cover from wire drive assembly.

8 mm

Loosen liner setscrew.

Loosen and remove retaining nut from liner. Pull liner out of gun cable. If necessary, twist cable to ease removal.

Twist top and bottom handle locking rings counterclockwise 1/4 turn. Slide bottom ring down cable and top ring forward over head tube. Separate gun handle halves.

Remove black sleeving from end of replacement liner.

Install retaining nut on one end of liner. Lay gun cable straight on a flat surface. Insert bare end of liner (end without retaining nut) into wire drive end of cable. Push liner toward gun. If necessary, twist cable to ease installation.

Ref. 804 241-A / 804 123-A / 803 837-A / 803 899-A

OM-923 Page 22

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Contents Description OM-923Processes File Flux Cored FcawFrom Hobart to You Table of Contents 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 About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux 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 blessuresPrincipales normes de sécurité En ce qui concerne les stimulateurs cardiaquesDuty Cycle And Overheating − SpecificationsSpecifications Volt-Ampere Curves Process/Polarity Table − InstallationInstalling Work Clamp PolarityInstalling Wire Spool And Adjusting Hub Tension Installing 4 in 102 mm Wire SpoolDo not move or operate unit where it could tip Installing Contact Tip And Nozzle Turn off welding power sourceThreading Welding Wire Input Power− Operation ControlsOperating The Gun Overload Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Drive Motor Protection Changing Drive Roll Or Wire Inlet Guide Slide replacement wire guide intoReplacing Gun Contact Tip Cleaning Gun Liner End of wire at spool Replacing Gun Liner13/16 in 21 mm Does not run Troubleshooting TableTrouble Remedy − Electrical Diagram Circuit Diagram− Wire Welding Guidelines Typical Fcaw Process ConnectionsThickness to Amperage a Typical Control SettingsWire Size Amperage Range AmperageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting Guide For Semiautomatic Welding Equipment Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Wire does not feed− Parts List Main AssemblyDia Part Description Quantity 225 PkgWire Drive Assembly 209Page Assistance ServiceSupport Contact your Distributor for Hobart Welding Products