Lincoln Electric SVM132-A K163 Undercarriage Requires K303, K377, or K378, K178 Mounting Platform

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C-3

ACCESSORIES

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K163 UNDERCARRIAGE (REQUIRES K303, K377, OR K378)

The undercarriage includes casters, wheels, a handle, and related hardware. Casters are mounted at the front and wheels are mounted at the rear of the plat- form. The handle is bolted to the front of the platform so the wire feeder can be tilted back and wheeled like a two-wheel truck. Installation sheet M13424 is provid- ed with the undercarriage.

K178 MOUNTING PLATFORM

This is a turntable type platform for mounting the LN-8 to the top of Idealarc power sources. Bolt the platform to the lift bail per the instructions supplied with the platform.

K58 MAGNETIC SEPARATOR

Useful with any submerged arc equipment. The unit removes foreign magnetic particles from reused sub- merged arc welding flux. Operating instructions are included with the kit.

K119 GRAVITY FEED FLUX CONE

The flux cone is manual feed attachment for the K112 and K113 sub-arc guns that is used instead of the continuous feed flux system. The flux cone attaches to the gun using the screws provided. The cone also includes a new clamp to be used to hold the trigger pod to the gun. Use it in place of the clamp shipped with the gun.

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K261 METER KIT

All LN-8 wire feed units with code no. 7580 to 7925 come equipped with a factory calibrated Speedmeter Trimmer PC board and meter kit receptacle prepared to accept the optional K261 speed-ammeter voltmeter (analog) kit. LN-8 wire feed units no. 7926 and above come with the speedmeter trimmers incorporated into the Control PC board.

K202 BURNBACK KIT

This kit is useful to help prevent the electrode from sticking in the crater at the end of the weld in two types of welding applications:

1.Welding with small diameter wire [0.035 thru 1/16 in. (0.9 thru 1.6 mm)] at fast wire feed speed when there is a tendency to overrun the wire.

2.When the semiautomatic gun is mounted in a fix- ture or on the K62 Squirtmobile in such a manner that it cannot be lifted from the work at the end of the weld.

The kit delays the dropout of the contactor allowing the electrode to burnback from the crater at the end of the weld. The delay time is adjustable for optimum burnback for different sizes, processes, and proce- dures. Installation instructions are shipped with the kit.

K310 FLUX SCREEN

The unit was designed to fit the top of either the stan- dard fill funnel or the K58 magnetic separator. The unit has a steel screen with 0.065 to 0.075 in. open- ings and an air vibrator attached to the frame. The vibrator can be used with air line pressures ranging from 20 through 100 psi.

For ease of handling, the user should connect the incoming air line to the 1/8 in. pipe elbow with the aid of a quick disconnect type air coupling.

It is very important that reclaimed flux to be used in the continuous flux feeding system be passed through the K310 screen or its equivalent.

K320 FLUX TANK

The flux tank is available to permit the LN-8 to be used for submerged arc welding. Installation instruc- tions are shipped with the kit.

K161 MECHANIZED TRAVEL

POWER PACK

The power pack supplies the power needed by the K110 hand travel unit or the K62 Squirtmobile when used with the K114 sub-arc welding gun. Complete installation instructions are shipped with the kit.

LN-8

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Contents LN-8 Semiautomatic Wire Feeder LN-8 SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Installation LN-8 with K378 Electrode DiameterLN-8 with K303 LN-8 with K377Power Source Connections Table A.1 Work Lead SpecificationsLN-8N and LN-8NE LN-8S and LN-8SE and Converted LN-8N and LN-8NE Power Source Selection Switch Variable Voltage PC BoardTable A.2 LN-8 Power Source Connection Diagrams Power Source Connection DiagramsSection TOC Installation TOC Figure A.5 Connection of LN-8 to R3S-250 and R3S-325 9A-9Figure A.6 Connection of LN-8 to DC-600 10A-10Power Source To LN-8 Input Cable Plug Control Cable LN-8 for Same Polarity Operation Shock Can Kill LN-8 for Opposite Polarity Operation14A-14 Figure A.10 for Power Sources Other than Lincoln ElectricLN-8NE and LN-8SE Cable Clamp Conductor Electrode Wire Reel BasecontrolInput Cable Connections LN-8N and LN-8SScrew Connections to Wire FeederExtension Tube Connector LockingSELF-TAPPING Screw Hinge Handle Figure A.14 Wire Feeder Handle InstallationGeneral Handling ProceduresGUN and Cable Assemblies LN-8S and LN-8SE Continuous Flux Feed Submerged ARCOperation Gouging Sparks Safety InstructionsControls and Their Functions Constant Current ControlsCurrent Controls Voltage Constant Voltage ControlsAvoiding Ground Lead Protector GLP Activation Circuit ProtectionFigure B.3 Wire Feed Rolls and Guide Tube Installation Wire Feed Rolls and Guide TubesSetting for CV or CC Power Sources Welding with a Constant Voltage Power SourceSlots Coil Reel Mounting a 50 or 60 lb CoilWire Reel Loading K1524-1 Universal Wire Reel Stand K363-P READI-REEL AdapterAdapter READI-REELS a K438 READI-REEL Adapter Must be Used To Mount 10 to 44 lb 4.5 to 20 kg Spools12 in./300 mm Diameter or 14 lb 6 kg Innershield CoilsFeeding Electrode to the LN-8N or LN-8S Feeding Electrode to the LN-8NE or LN-8SE with ExtensionBrass Blocks Hand Crank ARM Slow Acceleration Starting Code 7926 and Above Flux Tank LoadingAccessories General Table C.1 LN-8 Wire Feeder AccessoriesK58 Magnetic Separator K161 Mechanized Travel Power PackK163 Undercarriage Requires K303, K377, or K378 K178 Mounting PlatformReel Mounting Accessories Constant Current Conversion Parts Welding Guns Welding GUN AccessoriesLN-8 Table of Contents Maintenance Section MaintenanceRoutine Maintenance Periodic Maintenance Theory of Operation Table of Contents Theory of Operation SectionGeneral Description Power Input CircuitsFigure E.2 GUN Trigger and 1CR Contact Control Circuits GUN Trigger and 1CR Relay Contact Control CircuitsFuse Field SCR Operation 5E-5Applied Later CYCLE, the SCR Output Is Decreased LN-8 Troubleshooting and Repair Return to Return to Section TOC HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Troubleshooting & RepairProblems Symptoms Troubleshooting GuideFunction 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 Test Description Trigger Transformer TestTrigger Transformer Test Internal Voltage Test Control Board ConnectorReceptacle Circuit Applied BreakerTable F.1 Voltage Test Points Internal Voltage Test1CR Relay Test 1CR Relay Test Table F.2 Relay Test Terminal Connections 1CR Relay TestDrive Motor Test Drive Motor Test 1CR Figure F.6 GUN Terminal Jumper LocationsTable F.3 Drive Motor Test Points To further check the drive motorPotentiometer Replacement Repair Procedure Circuit Breaker Replacement Retaining NUT Ground Lead Protector Switch Mount Flatwasher Lockwasher NUTGround Lead Protector Push Button Switch Replacement Ground Lead Protector Push Button Trigger Transformer Replacement Insulation Sheet Trigger Transformer NUT Relay PC Board Roundhead ScrewPC Board Replacement Control PC Board Variable Voltage PC Board Relay PC Board Figure F.10 PC Board LocationsRelay Board Removal Control PC Board Replacement Wire Drive Assembly and Component Replacement Blue TWO BlackWhite Green Ground Yellow#568 #567 ShuntGearbox Insulation Sheet Mounting Plate MotorTOC Retest After Repair Electrical Diagrams LN-8N, -8NE, -8S, and -8SE Wiring Diagram Source Power to Work Connection Schematic1CR Wire Feed Motor Field Operating SchematicControl Board L5767 Schematic Variable Voltage Board L5039 Schematic Control Control Board L5767 LayoutVariable Voltage Board L5039 Layout SVM Error Reporting Form
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