Lincoln Electric SVM132-A Electrode Diameter, LN-8 with K303, LN-8 with K377, LN-8 with K378

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A-2		INSTALLATION						A-2
		INSTALLATION
TECHNICAL SPECIFICATIONS – LN-8

		INPUT – VOLTAGE

	115 VAC, 50/60 Hz @ 4.5 amps
		WIRE FEED SPEED

	50 in. to 600 in. per minute (1.25 to 15.24 m/min)
		WIRE DIAMETERS
ELECTRODE							DIAMETER

SOLID					0.030 in. through 3/32 in. (0.76 through 2.36 mm)

CORED					0.062 in. through 0.120 in. (1.57 through 3.05 mm)

		TEMPERATURE RATING
OPERATING					-4˚F to 104˚F (-20˚C to 40˚C)
STORAGE					-31˚F to 185˚F (-35˚C to 85˚C)

		PHYSICAL DIMENSIONS

							WEIGHT WIRE	TOTAL WEIGHT
	LENGTH	WIDTH			HEIGHT		DRIVE UNIT ONLY	LESS ELECTRODE
LN-8 WITH K303	30.25 in.	9.75 in.			26.50 in.		36.0 lb (◊)	80.0 lb. (◊)
(50-60 lb wire reel stand	(768 mm)	(248 mm)			(673 mm)		(16.3 kg)	(36.3 kg)
with dust cover over reel)	*	**						***
LN-8 WITH K377	22.19 in.	9.44 in.			17.00 in.		36.0 lb	48.0 lb.
(small stand equipped for	(564 mm)	(240 mm)			(432 mm)		(16.3 kg)	(21.8 kg)
Readi-Reel)
LN-8 WITH K378	25.68 in.	9.44 in.			17.00 in.		36.0 lb	48.0 lb.
(small stand equipped for	(652 mm)	(240 mm)			(432 mm)		(16.3 kg)	(21.8 kg)
14 lb Innershield coil)

*Add 1.00 in. (25.4 mm) to length if door kit is attached. ** Add 0.50 in. (12.7 mm) to width if door kit is attached.

***Add 7.31 lbs (3.32 kg) to total weight if door kit is attached. (◊) Codes below 7926-33.5 lbs (15.2 kg) and 78.5 lbs (35.6 kg)

LN-8

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Contents LN-8 Semiautomatic Wire Feeder Safety LN-8Electric 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 Installation Electrode Diameter LN-8 with K303LN-8 with K377 LN-8 with K378LN-8N and LN-8NE Power Source ConnectionsTable A.1 Work Lead Specifications Power Source Selection Switch Variable Voltage PC Board LN-8S and LN-8SE and Converted LN-8N and LN-8NEPower Source Connection Diagrams Table A.2 LN-8 Power Source Connection DiagramsSection TOC Installation TOC 9A-9 Figure A.5 Connection of LN-8 to R3S-250 and R3S-32510A-10 Figure A.6 Connection of LN-8 to DC-600Power Source To LN-8 Input Cable Plug Control Cable LN-8 for Same Polarity Operation LN-8 for Opposite Polarity Operation Shock Can KillFigure A.10 for Power Sources Other than Lincoln Electric 14A-14Cable Clamp Conductor Electrode Wire Reel Basecontrol Input Cable ConnectionsLN-8N and LN-8S LN-8NE and LN-8SEConnections to Wire Feeder Extension Tube ConnectorLocking ScrewFigure A.14 Wire Feeder Handle Installation SELF-TAPPING Screw Hinge HandleHandling Procedures GUN and Cable AssembliesLN-8S and LN-8SE Continuous Flux Feed Submerged ARC GeneralOperation Safety Instructions Controls and Their FunctionsConstant Current Controls Gouging SparksConstant Voltage Controls Current Controls VoltageCircuit Protection Avoiding Ground Lead Protector GLP ActivationWire Feed Rolls and Guide Tubes Figure B.3 Wire Feed Rolls and Guide Tube InstallationSetting for CV or CC Power Sources Voltage Power Source Welding with a ConstantMounting a 50 or 60 lb Coil Slots Coil ReelAdapter Wire Reel Loading K1524-1 Universal Wire Reel StandK363-P READI-REEL Adapter To Mount 10 to 44 lb 4.5 to 20 kg Spools 12 in./300 mm Diameter or 14 lb 6 kgInnershield Coils READI-REELS a K438 READI-REEL Adapter Must be UsedBrass Blocks Hand Crank ARM Feeding Electrode to the LN-8N or LN-8SFeeding Electrode to the LN-8NE or LN-8SE with Extension Flux Tank Loading Slow Acceleration Starting Code 7926 and AboveAccessories Table C.1 LN-8 Wire Feeder Accessories GeneralK161 Mechanized Travel Power Pack K163 Undercarriage Requires K303, K377, or K378K178 Mounting Platform K58 Magnetic SeparatorReel Mounting Accessories Welding Guns Welding GUN Accessories Constant Current Conversion PartsLN-8 Maintenance Table of Contents Maintenance SectionRoutine Maintenance Periodic Maintenance Table of Contents Theory of Operation Section Theory of OperationPower Input Circuits General DescriptionGUN Trigger and 1CR Relay Contact Control Circuits Figure E.2 GUN Trigger and 1CR Contact Control CircuitsFuse Field Applied Later CYCLE, the SCR Output Is Decreased SCR Operation5E-5 LN-8 Troubleshooting and Repair HOW to USE Troubleshooting Guide Return to Return to Section TOCTroubleshooting & Repair PC Board Troubleshooting ProceduresTroubleshooting Guide Problems SymptomsFunction Problems Transformer Test Perform the 1CR Relay Test Feeding Problems Welding Problems LN-8 Electrical Sequence of Operation Figure F.1 LN-8 Electrical Sequence of Operation Trigger Transformer Test Test DescriptionTrigger Transformer Test Internal Voltage Test Connector ReceptacleCircuit Applied Breaker Control BoardInternal Voltage Test Table F.1 Voltage Test Points1CR Relay Test 1CR Relay Test 1CR Relay Test Table F.2 Relay Test Terminal ConnectionsDrive Motor Test Drive Motor Test Figure F.6 GUN Terminal Jumper Locations 1CRTo further check the drive motor Table F.3 Drive Motor Test PointsPotentiometer Replacement Repair Procedure Circuit Breaker Replacement Ground Lead Protector Switch Mount Flatwasher Lockwasher NUT Retaining NUTGround Lead Protector Push Button Switch Replacement Ground Lead Protector Push Button Trigger Transformer Replacement Relay PC Board Roundhead Screw Insulation Sheet Trigger Transformer NUTPC Board Replacement Figure F.10 PC Board Locations Control PC Board Variable Voltage PC Board Relay PC BoardRelay Board Removal Control PC Board Replacement Wire Drive Assembly and Component Replacement Black WhiteGreen Ground Yellow Blue TWOShunt #568 #567Motor Gearbox Insulation Sheet Mounting PlateTOC Retest After Repair Electrical Diagrams LN-8N, -8NE, -8S, and -8SE Wiring Diagram Connection Schematic Source Power to WorkOperating Schematic 1CR Wire Feed Motor FieldControl Board L5767 Schematic Variable Voltage Board L5039 Schematic Control Board L5767 Layout ControlVariable Voltage Board L5039 Layout SVM Error Reporting Form