Miller Electric XR W, XR A manual Changing Or Cleaning Gun Drive Roll

Page 34

6-2. Changing Or Cleaning Gun Drive Roll

		Turn Off wire feeder and welding
		power source.
		1	Top Cover
		2	Pressure Roll Assembly
		Cut off wire where it enters
		pressure roll assembly area.
		3	Setscrew
5		4	Current Pick-Up Tab
5		This tab helps prevent burnback
		This tab helps prevent burnback
		caused by welding arcs inside the
		contact tip. This tab may be re-
		moved to provide an insulated drive
		roll. (If tab is removed, a smaller di-
3		ameter contact tip is recom-
3	1	mended. See options in Parts List.)
4		Lightly grease top of tab before rein-
		stalling.
		5	Drive Roll
		Use wire brush to clean drive roll.
		Install drive roll with desired groove
		down, and turn drive roll so one
		setscrew faces flat side of shaft.
		6	Bearing
		7	Liner
		Line up drive roll groove with bear-
		ing groove and liner opening.
		Tighten setscrews.

If changing drive roll in feeder, proceed to Section 6-3.

Thread welding wire through gun, and adjust drive roll pressure, if necessary (see Section 4-15). Close and secure pressure roll assembly. Reinstall top cover.

2

Tools Needed:	6	7
5/64 in

Ref. 151 599-F

OM-1581 Page 30

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Contents

Description OM-1581137 532YProcesses File MIG GmawFrom Miller to You Table of Contents Troubleshooting Spot Controls OptionalArc 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 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 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 cardiaquesGun Specifications − SpecificationsWire Feeder Specifications Duty Cycle And Overheating− Installation Constant Voltage CV Weld- ing Power Source Plug Top Cover Triangular Boss Removing Top Cover Of Pistol Grip GunPush door back into original posi- tion to close Air-Cooled Gun Connections Water-Cooled Gun Connections Air-Cooled Feeder Connections RegulatorReturn Fitting On Water-Cooled Feeder ConnectionsTop View Rear Panel Supply Fitting On RegulatorReinstall right side panel Voltage Sensing Lead Connections11 VAC/Contactor Control Plug Information Receptacle on welding power Pins a & B of PLG5Or -4, install 5-pin or Source, and install plug ontoInstalling Wire Spool Threading Welding Wire Through Feeder Threading Welding Wire Through Gun Coolant GuidelinesAdjusting Wire Feed Starting Speed Front Panel Controls Of Feeder Air-Cooled Model Shown Safety Equipment− Operation Work And Voltage Sensing Cable ClampsVoltage/Wire Speed Switch And Meter Optional Jog SwitchRun-In Speed Control Spot Controls Optional Power Switch Remote Voltage Control Optional Flowmeter Optional Internal ControlsCoolant Supply For Water-Cooled Models Only Gun ControlsShielding Gas Sequence Of Gas Metal Arc Welding Gmaw − Continuous Or SpotTurn Off all power before maintaining − Maintenance & TroubleshootingRoutine Maintenance MonthsChanging Or Cleaning Gun Drive Roll Changing Feeder Drive Roll And Wire Inlet Guide Close pressure roll assembly. Close and latch door Changing Gun Contact Tip Removing Diffuser In Air And Water-Cooled Pistol-Grip GunsSplit End Turn Off welding power source and wire feederReplacing The Liner Drive Roll Collet NutReplacing Hub Assembly Close gun pressure roll assembly and reinstall gun coverWater Flow Switch Optional For Water-Cooled Models Adjusting Hub TensionOverload Protection Troubleshooting Wire Feeder TroubleFilter, and clean fittings see Section Reinstall current pick-up tab if applicable see SectionGun Trouble − Electrical Diagrams Circuit Diagram For Wire FeederCircuit Diagram For Gun OM-1581 12 13 9 10 17 18 17 − Parts List45 46 Dia Part Description Quantity Mkgs CB1 Motor & Wire Drive -1 Item Includes ItemsPanel, Front w/Components Water-Cooled Model Illustrated Panel, Front w/Components -1 Item Items 24 38FigIncludes PLG20 136 Head Tube Assembly Of Pistol-Grip Gun − Parts List Including Consumables NumberExtra Heavy Duty FasTiptContact Tips Heavy Duty FasTiptContact TipsTapered FasTipt Contact Tips Barrel Assemblies Gas DiffusersInsulators Head Tube AssembliesYour distributor also gives ServiceSupport For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s