Lincoln Electric SVM208-A service manual Stator Removal Procedure

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F-45

TROUBLESHOOTING AND REPAIR

F-45

 

STATOR/ROTOR REMOVAL AND REPLACEMENT (continued)

FIGURE F.16 – OUTPUT LEAD LOCATION

TIE WRAP

W2

1 W

OUTPUT

TERMINALS

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STATOR REMOVAL PROCEDURE

1.Remove engine spark plug wire to prevent acci- dental kickback or starting.

2.With the 5/16” nutdriver, remove the 4 sheet metal screws that hold the top cover to the con- trol box. Remove the top cover.

3.Remove the 4 1/2” nuts and washers that anchor the control box to the stator frame. Two of the nuts also anchor the reactor. The reactor must be moved over to access the front left hand nut anchoring the control box. Be careful not to drop the washers into the machine.

4.Lift up the control box and unscrew the 4 rubber mounts. Set the control box onto the stator frame for the moment.

5.Pull apart the molex coupling that connects the stator to the wiring harness.

6.With the slot head screw driver, remove the 6 sheet metal screws that hold the control panel to the control box - 3 on each side. You may need to use the 5/16” end wrench on the engine side because of limited clearance. Pull the panel away from the control box.

7.With the 9/16” open end wrench, remove lead W2 (Black) from the output terminal. See Figure F.16 for location. With the diagonal cut- ters, cut the cable tie that holds the two output

leads together. Pull lead W2 back out of the way; screw the bolt back into the output termi- nal hole loosely for reassembly. Set the control panel back on the control box and hold it in place with 1 sheet metal screw in each side.

8.Remove the brush holder assembly. Open the brush holder assembly cover. Squeeze the 2 tabs and depress the cover at the top with a screw driver or your fingernail. The cover will drop open on its bottom hinge. With the 1/4” nutdriver, remove the 2 screws that hold the brush holder assembly in place. With the needlenose pliers, gently remove the black and the red wires. Set the brush holder aside. Pull the wires up into the control box.

9.Pull apart the molex coupling for the engine fly- wheel alternator. This is the single wire on the left side of the machine, running from the engine to the stator.

10.Disconnect lead W1 (Black) that connects to the reactor lead. Replace the nut, split-ring lock washer, and flat washer finger tight on the bolt for reassembly.

11.Slide the control panel and box assembly out of the machine cradle. Carefully pull the wire leads down through the box as you remove it. Note that the reactor is loose inside the box and may slide around.

BULLDOG® 140

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Contents Bulldog California Proposition 65 Warnings SafetyCan be dangerous Electric Shock can kill ARC Rays can burnWelding and Cutting Sparks can cause fire or explosion Cylinder may explode if damagedIii Sûreté Pour Soudage a L’Arc Précautions DE SûretéSafety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Bulldog 140 K2708-1 InstallationLocation and Ventilation Safety PrecautionsStoring Engine Exhaust can killStacking PRE-OPERATION Engine ServiceTilting OILElectrical Output CONNEC- Tions Welding Cable ConnectionsTable A.1 Recommended Welding Cable Size and Length Cable Installation Auxiliary Power ReceptaclesElectrical Connections Plugs and HAND-HELD EquipmentCircuit Breakers Premises WiringBulldog Ation. do not RUN TheseTable of Contents Operation Section Operation Limitations WELDER/GENERATOR ControlsOutput Panel Controls Gasoline Engine Controls Engine OperationStarting the Engine Before Starting the EngineGenerator Operation Table B.1 Generator Power Applications Control Function / Operation Welding OperationWelding Guidelines Material Thickness Electrode Type Size SettingStick Welding Learning To Stick WeldWhat Happens in the Arc? Side view Correct Welding PositionUse the following PracticeDo the following Butt JointsPenetration Fillet JointsVertical-Down Welding Vertical-Up WeldingOverhead Welding How to Hardface the Sharp Edge Metal to Ground WearWelding Sheet Metal Hardfacing To Reduce WearCast Iron Plate Preparation Welding Cast IronHigh-Speed Group AWS E6013 Low Hydrogen Group AWS E7018Out-of-Position Group AWS E6011 Bulldog Table of Contents Accessories Section Accessories OPTIONS/ACCESSORIESLincoln Electric Accessories Table of Contents Maintenance Section Maintenance Routine and Periodic Maintenance Engine MaintenanceLocation Return to Section TOC To Section TOC Engine AdjustmentsTable D.1 Engine Maintenance Parts Spark Plug ServiceOperational Clearance Screws Brushes GENERATOR/WELDER MaintenanceFigure D.7. Major Component Locations Bulldog 1TABLE of CONTENTS-THEORY of Operation Section E-1 ENGINE, EXCITATION, Rotor Stator Theory of OperationFigure E.3 Rotor Field Feedback and Auxiliary Power Rotor Field Feedback Auxiliary PowerWeld Winding and Reactor Auxiliary Power Overcurrent Protection1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide Troubleshooting and RepairPC Board Troubleshooting Procedures Output Problems Perform the Rotor Voltage Test Electric Authorized Field Ser vice FacilityProblems Symptoms Troubleshooting and Repair Perform Field Diode Test Engine Problems Troubleshooting and Repair Engine Throttle Adjustment Test Bulldog Rotor Voltage Test Test DescriptionMaterials Needed Procedure Rotor Voltage TestLead 200A Connection Ground Stud Field Diode Bridge Test + ~ Field Diode Bridge TestRotor Flashing Circuit Test Figure F.3 Brush Holder Leads 201- and 202B + Rotor Flashing Circuit TestMoving Parts can injure Bulldog Rotor Resistance Test Rotor Resistance Test Figure F.6 Brushes Retained with Cable TIE Cable TIE BrushesBulldog Engine Throttle Adjustment Test ROBIN/SUBARU Engine ROBIN/SUBARU Engine Engine Throttle Adjustment TestStrobe-tach Method Frequency Counter MethodHigh Speed Stop Screw Scope Settings High Idle no Load Normal Open Circuit Voltage Waveform 115VAC SupplyTypical Weld Output Waveform Machine LoadedMachine Loaded to 125 Amps AT 23 VAC Brush Removal and Replacement Cable TIE Brushes Brush Removal and ReplacementReturn to Section Return to Section TOC Bulldog Rheostat Removal and Replacement Figure F.11 Rheostat Removal Rheostat Removal and ReplacementCapacitor AND/OR Diode Bridge Removal and Replacement Removal and Replacement Procedure Capacitor Removal and ReplacementCapacitor AND/OR Diode Bridge Figure F.13 Field Diode Bridge Location Procedure Field Diode Bridge Removal and ReplacementBulldog Instructions STATOR/ROTOR Removal and ReplacementGeneratorengine STATOR/ROTOR Removal and ReplacementFigure F.15 Generator Components Troubleshooting and Repair Figure F.16 Output Lead Location TIE Wrap Terminals Stator Removal ProcedureNuts Thru Bolts SupportReassembly Procedure Rotor Removal ProcedureFigure F.19 Checking ROTOR-STATOR AIR GAP Retest After Repair Auxiliary Power Receptacle OUTPUT1Engine Output WELDER/GENERATOR OUTPUT1Bulldog Table of Contents Diagram Section Wiring Diagram Bulldog S28101