Lincoln Electric SVM168-B 26TROUBLESHOOTING & REPAIRF-26, Output Rectifier Bridge Test

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F-26TROUBLESHOOTING & REPAIRF-26

OUTPUT RECTIFIER BRIDGE TEST (continued)

FIGUTPURE F.4 – LOCATIONCTIFOF OUTPUT RECTIFIER LEADS

O T RE IER

(-) (+)

(-) (+)(+) (-)

ENGINE

TEST PROCEDURE

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1.Remove the spark plug wires to prevent accidental engine kickback or starting.

2.With the 5/16” nut driver, remove the 6 sheet metal screws from the case top.

3.Remove the rubber gasket (cover seal) from the lift bail.

4.Remove the fuel cap. The rubber gasket for the fill tube will come off with the case top.

5.Remove the case top, then replace the fuel cap.

6.With the 5/16” nut driver, remove the 5 screws holding the right case side.

7.Remove the right case side by lifting up and out.

8.Conduct the test with the gasoline engine OFF.

9.Locate the Output Rectifier Bridge behind the machine case front.

10.With the 7/16” wrench or socket wrench and 6” extension, remove the nuts and washers holding the diode bridge pigtails and the heavy current-carrying leads to the studs located in the middle of the rec- tifier assembly. Note their locations and the order of fasteners for reassembly.

11.Electrically isolate the (-) diode connectors by slightly bending them back into “free air.”

12.With an ohmmeter or diode tester, check each of the four diodes from their connec- tor to their respective heat sinks. See Figure F.4.

13.Reverse the tester leads and check the diodes again. Diodes should have a low resistance in one polarity and a very high resistance in the opposite polarity.

14.Replace any “shorted” or “open” diode bridge assembly the tests indicate.

15.Reconnect the diode connectors and heavy leads to their respective studs.

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

RANGER® 10,000 & RANGER® 10,000 PLUS

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Contents Ranger 10,000 /10,000 Plus Safety Powered equipmentFor Engine ARC Rays can burn Fumes and GasesWelding and Cutting Sparks can cause fire or Explosion Cylinder may explode If damagedIii Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation SectionSection A-1 Installation Height Width Depth WeightHorsepower Operating Speed RPM Machine Grounding Safety PrecautionsSpark Arrester TowingVehicle Mounting PRE-OPERATION ServiceGasoline Can cause fire or explosionAngle of Operation Welding Output CablesTotal Combined Length of Electrode and Work Cables LiftingStacking Connection of Lincoln Electric Wire FeedersInstructions Welder OperationDuplex Receptacles Auxiliary Power120/240 Volt Dual Voltage Receptacle Motor StartingThese Devices Without Additional Resistive Type Loads Not USE These Devices With a Ranger 10,000Simultaneous Welding and Power Standby Power ConnectionsFigure A.1 Ranger 10,000 & Ranger 10,000 Plus Operation Section Section B-1Operation Engine Switch OperationWelder Controls Function and Operation Kohler Honda Robin / Subaru 20 H.P. Command Polarity SwitchRange Switch Control DialStarting the Engine STARTING/SHUTDOWN InstructionsBREAK-IN Period Stopping the EngineWire Feed Welding Processes Constant Voltage Stick Constant Current WeldingTIG Constant Current Welding Start Switch Wire FEED, LN-15 Summary of Welding ProcessesAccessories Section Section C-1Accessories Optional Equipment Field InstalledTIG Welding Recommended EquipmentStick Plasma CuttingRanger 10,000 & Ranger 10,000 Plus Maintenance Section Section D-1Maintenance Safety PrecautionsKohler Honda AIR Cleaner and Other Maintenance OIL Filter ChangeOverspeed is Hazardous Engine AdjustmentsBattery Slip RingsAir Filter Pre-CleanerOil Filter ElementFigure D.1 Major Component Location Theory of Operation Section Section E-1Theory of Operation BATTERY, STARTER, ENGINE, ROTOR, STATOR, and Idler Solenoid Theory of OperationRotor Field Feedback and Auxiliary Power Figure E.3 Rotor Field Feedback and Auxiliary PowerWeld WINDING, REACTOR, Range Switch Figure E.4 Weld WINDING, REACTOR, and Range SwitchOutput BRIDGE, Choke Polarity SWITCH, and Output Terminals Ranger 10,000 & Ranger 10,000 Plus Troubleshooting & Repair Section Section F-1Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Electric ShockTroubleshooting Guide Output ProblemsOutput Problems Field Winding Voltage Test Adjustment Test Troubleshooting Guide Output Problems Engine Problems Make sure the leads are looped Charging Circuit Test Welding Problems Ranger 10,000 & Ranger 10,000 Plus Rotor Voltage Test Test DescriptionMaterials Needed Test Procedure Rotor Resistance Test Rotor Resistance Test Figure F.2 Location of Rotor Slip RingsTroubleshooting & Repair Ranger 10,000 & Ranger 10,000 Plus Auxiliary and Field Winding Test Auxiliary and Field Winding Test To test the 115 VAC windingTo test the 230 VAC winding To test the field winding Ranger 10,000 & Ranger 10,000 Plus Output Rectifier Bridge Test 26TROUBLESHOOTING & REPAIRF-26 Output Rectifier Bridge TestFigutpure F.4 Locationctifof Output Rectifier Leads Charging Circuit Test Charging Circuit Test Figure F.5 Location of Voltage RegulatorEngine Throttle Adjustment Test Engine Throttle Adjustment Test Figure F.6 Blower Paddle Marked for STROBE-TACH MethodFigure F.7 Oscilloscope Method Scope Settings Normal Open Circuit Voltage Waveform 115 VAC SupplyHigh Idle no Load Output Control AT Maximum Typical DC Weld Output Waveform CV Mode Machine LoadedMachine Loaded to 200 Amps AT 20 VDC Typical DC Weld Output Waveform CC Mode Machine Loaded to 200 Amps AT 26 VDCTypical AC Weld Output Waveform Machine Loaded to 225 Amps AT 25 VDCAbnormal 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 10,000 & Ranger 10,000 Plus Brush Removal and Replacement DescriptionBrush Removal and Replacement ProcedureSlip Rings Figure F.9 Brush LEADS/BRUSHES Retained with Cable TIERanger 10,000 & Ranger 10,000 Plus Printed Circuit Board Removal Replacement Printed Circuit Board Removal and Replacement Figure F.10 Printed Circuit Board LocationReplacement Printed Circuit Board RemovalRanger 10,000 & Ranger 10,000 Plus Output Rectifier Bridge Removal Replacement Remove the case top, then reinstall the fuel cap Output Rectifier Bridge RemovalSection TOC Ranger 10,000 & Ranger 10,000 Plus ENGINE/ROTOR Removal and Replacement InstructionsENGINE/ROTOR Removal Figure F.12 Component LOCATIONS, ENGINE/ROTOR RemovalEngine and Rotor Removal Procedure Rotor Removal Procedure Figure F.13 Engine and Rotor Removed from Stator THRU-BOLTReplacement KIT S20788 Reassembly ProcedureRetest After Repair Electrical Diagrams Section Electrical DiagramsSection G-1 Electrical Diagrams Wiring Diagram Code 11041 only -M20226Wiring Diagram Code 11095 only M20301 Ranger 10,000 HondaRanger 10,000 Wiring Diagram Code 11398 M21269 Ranger 10,000 Plus Schematic Entire Machine Codes 11395 and 11398 L13105 L13105Schematic Entire Machine CDE 11394 L13103 L13103Schematic Entire Machine Code 11095 & 11253 only L12257 Schematic Entire Machine Code 11151 only L12249-1 L12249Electrical Diagrams Electrical Diagrams