Manuals / Lincoln Electric / Power Tools / Welder

Lincoln Electric LF-72/74 service manual Accessories

Models: LF-72/74

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C-4	ACCESSORIES	C-4

	OPTIONAL KITS:

	K489-7		Gun Receiver Bushing (for Lincoln		Includes: Gun receiver bush-
	K489-7		Gun Receiver Bushing (for Lincoln		Includes: Gun receiver bush-
			Fast-Mate guns.)		ing with trigger connector.

	K466-2		Magnum 200/300/400 to K1500-2		Includes: Gun adapter, cotter
	K466-2		Magnum 200/300/400 to K1500-2		Includes: Gun adapter, cotter
			Adapter.		pin, hex key wrench, wrench.


	K613-7		Magnum 550 to K1500-3 Adapter		Includes: Trigger adapter, gun
	K613-7		Magnum 550 to K1500-3 Adapter		Includes: Trigger adapter, gun
			Lincoln Conduit.		adapter and hex key wrench.


	K1546-1		Incoming Bushing, for Lincoln		Includes: Incoming bushing
	K1546-1		Incoming Bushing, for Lincoln		Includes: Incoming bushing
			Conduit .025- 1/16" (0.6 - 1.6mm)		and hex key wrench.
			wire.


	K1546-2		Incoming Bushing, for Lincoln		Includes: Incoming bushing
	K1546-2		Incoming Bushing, for Lincoln		Includes: Incoming bushing
			Conduit 1/16-1/8" (1.6 - 3.2 mm )		and hex key wrench.
			wire.


	K435		Spindle Adapter, for mounting 14		Includes: Spindle Adapter
	K435		Spindle Adapter, for mounting 14		Includes: Spindle Adapter
			lb. (6.4 kg) Innershield Coils on 2		made from 2 coil retainers.
			in (51 mm) spindles.		(Electrode not included.)


	K468		Spindle Adapter, for mounting 8in		Includes: Spindle Adapter.
	K468		Spindle Adapter, for mounting 8in		Includes: Spindle Adapter.
			(203mm) diameter spools on 2 in
			(51 mm) spindles.

	K363P		Readi-Reel Adapter, for mounting		Includes: Readi-Reel spool
	K363P		Readi-Reel Adapter, for mounting		Includes: Readi-Reel spool
			23-30 lb. (10.4 - 13.6 kg) reels to 2		adapter. (Spool of electrode
			in (51 mm) spindles.		not included.)


	K438		Readi-Reel Adapter, for mounting		Includes: Readi-Reel spool
	K438		Readi-Reel Adapter, for mounting		Includes: Readi-Reel spool
			50-60 lb. (22.7 - 27.2 kg) reels to		adapter. (Spool of electrode
			2 in (51 mm) spindles. For use		not included.)
			with Heavy Duty Bench models.

			Coil Adapter, for mounting 50-60
			Coil Adapter, for mounting 50-60
	K1504-1		lb. (22.7 - 27.2 kg) coils to 2 in (51		Includes: 50-60 lb. (22.7 -
			mm) spindles.		27.2 kg) coil adapter.
			For use with heavy Duty Bench

LF-72/74

Image 36

Lincoln Electric LF-72/74 service manual Accessories

Contents

LF-72/74 Safety Electric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation SectionSection A-1 Installation Amp Rating Duty CycleSafety Precaution LocationMounting Bench Mount Swivel MountBoom Mount SuspendedWeld Cable Sizes Coaxial Weld Cables Weld Cable ConnectionINSTALLATIONA-7 Analog Control CableControl Cable Connections Miller Power Source Lincoln Wire Feeder Analog Miller Control Cable Adapter K2335-1Pin Function Wire Drive Systems Welding GUN/WIRE Feeder Trigger ConnectorRemote Sense Lead Specifications High Frequency ProtectionWelding GUNS, Torches and ACCES- Sories Magnum GUN and Cable AssembliesProcedure for Changing Drive and Idle Roll Sets Wire Drive ConfigurationRolls.FIGURE A.4 Pressure ARM Adjustment Gun Receiver For use With BushingSet the pressure arm as follows See Figure A.6 Wire Reel Loading Weld Wire Routing Figure A.9Shielding GAS Connection Installing Electrode To install Lincoln conduit See Figure A.10bConduit Kits For Codes 11209, 11210, 11211 and aboveAluminum Wire Preparations Figure A.12bINSTALLATIONA-18 Base Model Bench Model Standard Duty Bench Model Heavy DutyTypical System Configurations CableLF-72/74 Operation Section Section B-1Operation GAS Input Work ConnectionCommon Welding Abbreviations Product DescriptionRecommended Processes Front Panel Controls and Connections Figure B.1 Case Front Controls DescriptionBurnback and Postflow Timer KIT Cold FEED/GAS Purge SwitchStep Trigger Interlock Switch Remote Voltage Control KITWire Feed Speed Knob Trigger Connector 5-PIN AmphenolGUN Receiver Bushing K1500-2 Trigger InterlockAccessories Section Section C-1Accessories Optional KitsLF-72s Accessories Key LF-72/74 Maintenance Section Section D-1Maintenance MaintenanceCalibration Specification Routine MaintenanceFigure D.1 Figure D.3 Major Component Location Section AA-1 Section AAWFS Range Wire Sizes AA-2Model AA-3 Figure AA.1AA-4 AA-5 AA-6 Coaxial Weld CableINSTALLATIONAA-7 AA-7K1797-xx AA-8 Drive Roll Kits Steel or Cored Wires AA-9AA-10 Figure AA.3AA-11 Changing the Gun Receiver BushingLation or changing drive rolls and/or GuidesAssembly of Drive Rolls and Wire Guides AA-12AA-13 Set the pressure arm as follows See Figure AA.8AA-14 AA-15 Loading 16 to 44 lb .3 20kg Spools See figure AA.8AA-16 Figure AA.11AA-17 Figure AA.12aAA-18 Figure AA.12bAA-19 AA-20INSTALLATIONAA-20 Common Equipment SET-UPSFigure AA.15 High Volume Production AA-21Figure AA.16 Portable Welding AA-22Section BB-1 Section BBBB-2 Fcaw Innershield or OutershieldRequired Equipment BB-3BB-4 Figure BB.1 Case Front Controls DescriptionBB-5 K2426-1 and K2426-2 modelsK2426-3 model Switch BB-6Section CC-1 CC-2 CC-3 CC-4 CC-5 CC-6 Section DD-1 Section DDTo verify the wire feed speed Nal wiringWhen inching with gun trigger, electrode WFS knob setting Could remain energized Several secondsMAINTENANCEDD-3 DD-3Figure DD.3 Major Component Location DD-4Theory of Operation Section Section E-1Theory of Operation Return to SectionControl Board LF-72/74 Troubleshooting & Repair Section Section F-1Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Function Problems Function Problems Troubleshooting & Repair Drive Motor and Tach Feedback Test Test DescriptionTest Procedure Troubleshooting and Repair GAS Solenoid TestTest Procedure Figure F.3 Leads 552, 552BDiode Bridge Test 552B + 552A Wire Speed Potentiometer Test Wire Speed Potentiometer Test 14F-14PC Board Removal and Replacement Control PC Board Removal and Replacement Procedure Removal Procedure Replacement ProcedureTroubleshooting and Repair Wire Drive Motor and Gear BOX Removal and Replacement ProcedureProcedure Replacement Procedures SET UP Operation VerificationLF-72/74 Electrical Diagrams Section Section G-1Electrical Diagrams LF-72/74Timer KIT Board Normal Speed Micro Internal panel Motor Connecter Summary High Torque Setting engages Schematic Common Analog Control PC Board G4559 Sheet Electrical Diagrams Electrical Diagrams PC Board Assembly Common Analog Control G4560-2E0