Return to Section Return to Section TOC | Lincoln Electric SVM208-A

TOC

TOC

F-33	TROUBLESHOOTING AND REPAIR	F-33

BRUSH REMOVAL AND REPLACEMENT (continued)

Return to Section

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master

Return to Master TOC

Return to Master TOC

Return to Master TOC

8.To reinstall the brush holder assembly, depress the spring-loaded brushes into the holder and slip a suitable non-metallic, fairly stiff retainer through the slots at the top and bottom of the holder. A cable tie works well; see Figure F.10. This will hold the brushes up so that you can easily install the holder.

9.With the needlenose pliers, reinstall the red and the black wires to the appropriate termi- nals on the brushes. The red wire is inboard.

10.Slip the holder into position in the generator end bracket. Be careful not to loosen the 2 attached wires.

11.Reinstall and tighten the 2 screws with the 1/4” nut driver.

12.Slowly remove the non-metallic retainer from the brush holder and let the brushes snap back against the slip rings.

13.Check the wire connections or clearance and tightness.

14.Snap the brush holder cover back into posi- tion.

BULLDOG® 140

Image 81

Lincoln Electric SVM208-A service manual Return to Section Return to Section TOC

Contents

Bulldog California Proposition 65 Warnings Safety Can be dangerous Electric Shock can kill ARC Rays can burn Welding and Cutting Sparks can cause fire or explosion Cylinder may explode if damagedIii Sûreté Pour Soudage a L’Arc Précautions DE Sûreté Safety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Bulldog 140 K2708-1 Installation Location and Ventilation Safety PrecautionsStoring Engine Exhaust can kill Stacking PRE-OPERATION Engine ServiceTilting OIL Electrical Output CONNEC- Tions Welding Cable ConnectionsTable A.1 Recommended Welding Cable Size and Length Cable Installation Auxiliary Power ReceptaclesElectrical Connections Plugs and HAND-HELD Equipment Circuit Breakers Premises Wiring Bulldog Ation. do not RUN These Table of Contents Operation Section Operation Limitations WELDER/GENERATOR ControlsOutput Panel Controls Gasoline Engine Controls Engine Operation Starting the Engine Before Starting the Engine Generator Operation Table B.1 Generator Power Applications Control Function / Operation Welding Operation Welding Guidelines Material Thickness Electrode Type Size SettingStick Welding Learning To Stick Weld What Happens in the Arc? Side view Correct Welding Position Use the following PracticeDo the following Butt Joints Penetration Fillet Joints Vertical-Down Welding Vertical-Up Welding Overhead Welding How to Hardface the Sharp Edge Metal to Ground WearWelding Sheet Metal Hardfacing To Reduce Wear Cast Iron Plate Preparation Welding Cast Iron High-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 Adjustments Table D.1 Engine Maintenance Parts Spark Plug ServiceOperational Clearance Screws Brushes GENERATOR/WELDER Maintenance Figure D.7. Major Component Locations Bulldog 1TABLE of CONTENTS-THEORY of Operation Section E-1 ENGINE, EXCITATION, Rotor Stator Theory of Operation Figure E.3 Rotor Field Feedback and Auxiliary Power Rotor Field Feedback Auxiliary Power Weld Winding and Reactor Auxiliary Power Overcurrent Protection 1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide Troubleshooting and Repair PC Board Troubleshooting Procedures Output Problems Perform the Rotor Voltage Test Electric Authorized Field Ser vice Facility Problems 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 Test Rotor Flashing Circuit Test Figure F.3 Brush Holder Leads 201- and 202B + Rotor Flashing Circuit Test Moving Parts can injure Bulldog Rotor Resistance Test Rotor Resistance Test Figure F.6 Brushes Retained with Cable TIE Cable TIE Brushes Bulldog Engine Throttle Adjustment Test ROBIN/SUBARU Engine ROBIN/SUBARU Engine Engine Throttle Adjustment TestStrobe-tach Method Frequency Counter Method High Speed Stop Screw Scope Settings High Idle no Load Normal Open Circuit Voltage Waveform 115VAC Supply Typical Weld Output Waveform Machine LoadedMachine Loaded to 125 Amps AT 23 VAC Brush Removal and Replacement Cable TIE Brushes Brush Removal and Replacement Return to Section Return to Section TOC Bulldog Rheostat Removal and Replacement Figure F.11 Rheostat Removal Rheostat Removal and Replacement Capacitor 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 Replacement Bulldog Instructions STATOR/ROTOR Removal and Replacement Generatorengine STATOR/ROTOR Removal and Replacement Figure F.15 Generator Components Troubleshooting and Repair Figure F.16 Output Lead Location TIE Wrap Terminals Stator Removal Procedure Nuts Thru Bolts Support Reassembly Procedure Rotor Removal Procedure Figure F.19 Checking ROTOR-STATOR AIR GAP Retest After Repair Auxiliary Power Receptacle OUTPUT1Engine Output WELDER/GENERATOR OUTPUT1 Bulldog Table of Contents Diagram Section Wiring Diagram Bulldog S28101