Lincoln Electric SVM107-B service manual Troubleshooting & Repair

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F-19

F-19

TROUBLESHOOTING & REPAIR

13.Measure the resistance to ground.

A.Set the ohmmeter on the high scale (X100,000).

B.Place one probe on either of the slip rings. Place the other probe on any good, unpainted ground. The machine ground stud works well.

C.Check the resistance. It should read very high, at least 0.5 megohm (500,000 ohms).

If the test does not meet the resistance specifications, then the rotor may be faulty. Replace the rotor.

If the test does meet the resistance specifications, then the rotor is okay.

14.Connect lead 200A to the positive brush, which is the one nearest the rotor lamination. Connect lead 219 to the negative brush.

15.Reinstall the case side, case top, fuel cap, lift bail gasket and spark plug wires.

RANGER 8

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Contents Rangertm Safety Electric Shock can kill Iii Welding Sparks can cause fire or explosionPrécautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Welding Output Auxiliary Power50 100 150 200 250 300 350 Output Amps 20 B50 100 150 200 Installation Instructions Fuel Battery ConnectionsOil AWGAngle of Operation Constant Current Connection of the LN-7 to the RangerWelder Output RangerMotor Starting Duplex ReceptaclesType Common Electrical Devices Possible Concerns Electrical Device USE with the RangerStandby Power Connections Auxiliary Power While WeldingFigure A.1 Connection of Ranger 8 to Premises WiringRanger Table of Contents Operation Section AC/DC TIG Welding Constant Current DC Semiautomatic Wire Feed Welding Constant VoltageAC/DC Stick Welding Constant Current Welding voltage control with the Range switch set Control SwitchProvides a fine welding current adjustment within Range Switch settings in the STICK/TIG modeStopping the Engine Starting/Shutdown InstructionsTIG Constant Current Welding Wire Feed Welding Processes Constant VoltageStick Constant Current Welding Stick Auto Summary of Welding ProcessesSection C-1Section C-1 Accessories Recommended Equipment Ranger Table of Contents Maintenance Kohler Onan Honda Routine MaintenanceEngine OIL Change Engine OIL Refill CapacitiesOIL Filter Change Slip Rings Engine AdjustmentsEngine Maintenance Parts Pre-CleanerFigure D.1 Major Component Locations Ranger Table of Contents Theory of Operation Section Theory of Operation Rotor Field Feedback and Auxiliary Power Weld WINDING, REACTOR, Range Switch Output BRIDGE, Choke Polarity SWITCH, and Output Terminals Ranger Table of Contents Trouble Shooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairHandle only at PC board can be damaged by static electricityStatic-Sensitive DevicesOutput Problems Troubleshooting GuideDetailed in the beginning of this manual Observe Safety GuidelinesTroubleshooting & Repair Troubleshooting & Repair Troubleshooting Guide Troubleshooting & Repair Engine Problems Troubleshooting & Repair Troubleshooting & Repair Welding Problems Ranger Materials Needed Rotor Voltage TestTest Description Test Procedure Rotor Resistance Test Rotor Resistance Test Troubleshooting & Repair Ranger Auxiliary and Field Winding Test To test the 230 VAC winding To test the 115 VAC windingTo test the field winding Ranger Output Rectifier Bridge Test Output Rectifier Bridge Test Charging Circuit Test Charging Circuit Test Engine Throttle Adjustment Test Engine Throttle Adjustment Test Engine Throttle Adjustment Test Oscilloscope Method High Idle no Load Output Control AT Maximum Scope SettingsNormal Open Circuit Voltage Waveform 115 VAC Supply Machine Loaded Typical DC Weld Output Waveform CV ModeMachine Loaded to 200 Amps AT 26 VDC Typical DC Weld Output Waveform CC ModeMachine Loaded to 225 Amps AT 25 VDC Typical AC Weld Output WaveformAbnormal Open Circuit Weld Voltage Waveform CV Mode Abnormal Open Circuit DC Weld Voltage Waveform Normal Open Circuit Weld Voltage Waveform CV Mode Normal Open Circuit DC Weld Voltage Waveform CC Mode Normal Open Circuit AC Weld Voltage Waveform Ranger Description Brush Removal and ReplacementProcedure Brush Removal and ReplacementFigure F.10 Brush LEADS/BRUSHES Retained with Cable TIE Slip RingsRanger Field Capacitor AND/OR Rectifier Bridge Removal Replacement Field Capacitor AND/OR Rectifier Bridge Removal ReplacementProcedure Rectifier Bridge Removal and Replacement Ranger Printed Circuit Board Removal Replacement Procedure Printed Circuit Board Removal and ReplacementPrinted Circuit Board Removal Ranger Output Rectifier Bridge Removal Replacement Output Rectifier Bridge Removal Remove the case top, then reinstall the fuel capSection TOC Ranger Instructions ENGINE/ROTOR Removal and ReplacementFigure F.14 Component LOCATIONS, ENGINE/ROTOR Removal ENGINE/ROTOR RemovalEngine and Rotor Removal Procedure Figure F.15 Engine and Rotor Removed from Stator Rotor Removal ProcedureReassembly Procedure Replacement KIT S20788Retest After Repair Table of Contents Diagrams Section Dimension RANGER8 Dimension Print Ranger 8 Honda & KohlerConnection of Ranger 8 to LN-7 & K240 Contactor KIT DiagramsWiring Diagram Onan NON CSA Model Electrical DiagramsWiring Diagram Onan CSA Model K1418-2 Ranger 8 Onan CSA Version Wiring DiagramWiring Diagram Kohler NON CSA Model K1419-1 Ranger 8 Kohler Wiring DiagramWiring Diagram Kohler CSA Model K1419-2 Ranger 8 Kohler CSA Wiring DiagramK2160-1 Ranger 8 Honda CSA Wiring Diagram 16482 Schematic IDLER/CONTROL PC BoardPC Board Assembly IDLER/CONTROL SVM Error Reporting Form