Lincoln Electric SVM134-A service manual DC Exciter Armature and Field Coils, Reassembly

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F-33

F-33

TROUBLESHOOTING & REPAIR

DC EXCITER ARMATURE AND FIELD COILS

REMOVAL AND REPLACEMENT (continued)

FIGURE F.12 – EXCITER COVER REMOVAL

	POLE PIECE BOLTS (4)
	EXITER FRAME
ARMATURE	BRUSH HOLDER
ARMATURE	ASSEMBLY (2)
SLEEVE COLLAR
FLAT WASHER
ARMATURE LOCKING NUT
EXITER COVER

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PROCEDURE

DC Exciter Armature Removal Procedure

1.Turn the engine OFF.

2.Using the 3/8” nut driver, remove the exciter cover. See Figure F.12.

3.Using the 3/8” wrench, remove the two brush holder assemblies. Note insulator placement for reassembly.

4.Bend the flat washer away from the armature locking nut.

5.Using the 1-5/8” socket wrench, remove the armature locking nut, washer, and sleeve col- lar.

6.Carefully remove the armature by sliding it from the shaft.

NOTE: The sleeve collar may have to be removed with a gear puller. Be careful not to damage the armature commutator.

Reassembly:

7.Upon reassembly, the armature locking nut should be torqued to 170 ft.-lbs. Install a new sleeve collar if necessary (Part number T5345). Bend the flat washer against the locking nut.

8.Install the brush holder assemblies. Note insulator placement.

9.Check the armature air gap. Minimum gap should be .025”.

10.Install the exciter cover.

CLASSIC I

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Contents Classic I TM California Proposition 65 Warnings 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 Table of Contents Installation Section Technical Specifications Classic InstallationStoring Safety PrecautionsLocation and Ventilation PRE-OPERATION Engine Service Muffler Cooling SystemExhaust Spark Arrester TrailersFigure A.1 Ground Stud Location Machine GroundingElectrical Output Connections Auxiliary Power Receptacle PLUGS, and HAND-HELD EquipmentWelding Cable Connections Cable size for combined lengthClassic Table of Contents Operation Section Operating Instructions Safety InstructionsOperation Recommended Applications Operational Features and ControlsWelder GeneratorWELDER/GENERATOR Controls Controls and SettingsFigure B.2 Current Controls Control of Welding CurrentReturn Section TOC Gasoline Engine ControlsStarting the Engine Engine OperationBefore Starting the Engine BREAK-IN Period Stopping the EngineCold Weather Starting After you finish welding Welding OperationTable B.1 Range Settings for Wire SIZE/SPEED Auxiliary PowerTable of Contents Accessories Semiautomatic Welding Accessories OPTIONS/ACCESSORIESWire Feed Module see Figure C.1 Connection of Lincoln Electric Wire FeedersConnection of the LN-25 to Classic I Across the ARC withClassic Table of Contents Maintenance Engine Maintenance Safety Precautions Routine and Periodic MaintenanceFigure D.1 OIL Drain and Refill MAX MIN Figure D.2A Engine Coolant Drain Plug Gap Specifications 0.032 inch .8 mm After cleaning or when installing a new spark plugSet the terminal gap with a feeler gauge or gapping Tool. See Figure D.4Classic I charging system is Negative Battery MaintenanceReturn to Section Return to Section TOC WELDER/GENERATOR MaintenanceIdler Maintenance Figure D.5 Major Component Locations Classic Table of Contents Theory of Operation Section General Description BATTERY, STARTER, Engine Alternator and OIL Switch CircuitTheory of Operation Main SHUNT, Interpole and Series Coils ENGINE, Main Generator Armature and Frame and DC ExciterExcitation Flashing Engine Idler Circuit Fine Current AdjustmentCurrent Range Selector DC Generator Machines Return to Section TOC Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board can be damaged by static electricity PC Board Troubleshooting ProceduresDetailed in the beginning of this manual Troubleshooting GuideObserve Safety Guidelines Shunt Field Winding Test Main Generator Throttle Adjustment Test Output Problems Function Problems Troubleshooting & Repair Engine Problems Welding Problems Materials Needed DC Exciter TestTest Description DC Exciter Test Test ProcedureFigure F.2 Exciter Cover Removal Shunt Coil and Series Coil Resistance Tests Small Flex Lead SolidIdler Solenoid Test Troubleshooting & Repair Main Generator Shunt Field Winding Test Main Generator Shunt Field Winding Test Figure F.6 Plug P10 PIN Assignments TAB Engine Throttle Adjustment Test Strobe Tach Method Engine Throttle Adjustment TestAdjust High Idle Engine Throttle Adjustment TestAdjust Low Idle Description Flashing the FieldsFlashing the Fields ProcedureFigure F.11 Brush HOLDER/BATTERY Jumper Connections High Idle no Load Fine Current Control Rheostat AT Maximum Scope SettingsNormal Open Circuit Voltage Waveform 115VDC Supply Normal Open Circuit DC Weld Voltage Waveform Typical DC Weld Voltage Waveform Machine Loaded Selector Switch AT MaximumDC Exciter Armature and Field Coils Removal and Replacement DC Exciter Armature and Field Coils DC Exciter Armature Removal ProcedureReassembly Perform the DC Exciter Armature Removal Procedure Field Coils Removal ProcedureMain Generator Frame Removal and Replacement Replacement Bolt / NUT Main Generator Frame RemovalPerform the DC Exciter Armature Removal Lead Figure F.16 Selector Switch Lead Removal TerminalFigure F.18 Choke Control Cable Removal Loosen Here Main Generator Frame Removal Figure F.20 Front Panel Fastener Removal Troubleshooting & Repair Remove Mounting NUTS, Washers Bolts FeetPerform the DC Exciter Armature Reassembly Procedure Main Generator Armature Removal and Replacement Armature is now free to be removed from the engine Main Generator Armature RemovalRetest After Repair DC Auxiliary Power Receptacle OutputEngine Output Welder DC OutputElectrical Diagrams Section Wiring Diagram Classic Electrical DiagramsWiring Diagram Wire Feed Module Wire Feed Module Wiring Diagram16990 M Schematic Idler PC BoardIdler PC Board Assembly Idler PC Board