Lincoln Electric SVM134-A service manual Throttle Adjustment Test

Page 51

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F-7

 

 

 

 

F-7

TROUBLESHOOTING & REPAIR

 

TROUBLESHOOTING GUIDE

 

 

 

Observe Safety Guidelines

 

 

 

detailed in the beginning of this manual.

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

OUTPUT PROBLEMS

 

 

 

The engine starts and runs at the

 

1. Check the DC receptacle and

1.

Check for loose or faulty con-

correct speed, but there is no DC

 

plug for loose or faulty connec-

 

nections or wires at the 115

auxiliary output voltage at the

 

tions.

 

 

VDC receptacle and associated

115VDC receptacle. The welding

 

2. Check the 15 Amp fuse. CSA

 

circuitry.

See the Wiring

generator is functioning correctly.

 

 

Diagram.

 

 

machines only.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The actual welding current is much

 

1. Check the welding cables for

1.

The engine RPM may be low. If

less than is indicated on the dials.

 

loose or faulty connections.

 

necessary perform the Engine

 

 

2. The welding cables may be

 

Throttle Adjustment Test.

 

 

 

 

 

 

 

excessively long or coiled.

2.

Perform the DC Exciter Test.

 

 

3. Check the main DC generator

3.

Check the fine current control

 

 

brushes for good commutation

 

field rheostat for resistance and

 

 

and alignment.

Contact the

 

proper operation. Normal resis-

 

 

Lincoln Electric

Service Dept.

 

tance is 64 ohms. Check asso-

 

 

1-800-833-9353 (WELD).

 

ciated wires for loose or faulty

 

 

 

 

 

connections.

See the Wiring

 

 

 

 

 

Diagram.

 

 

 

 

 

4.

Check the current range selec-

 

 

 

 

 

tor switch and contacts for prop-

 

 

 

 

 

er operation.

 

 

 

 

 

5.

Perform the

Main Generator

 

 

 

 

 

Shunt Field Winding Test.

 

 

 

 

6.

The main armature may be

 

 

 

 

 

faulty. Check for grounds.

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-800-833-9353.

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 InstallationSafety Precautions Location and VentilationStoring PRE-OPERATION Engine Service Trailers Cooling SystemMuffler Exhaust Spark ArresterFigure A.1 Ground Stud Location Machine GroundingCable size for combined length Auxiliary Power Receptacle PLUGS, and HAND-HELD EquipmentElectrical Output Connections Welding Cable ConnectionsClassic Table of Contents Operation Section Safety Instructions OperationOperating Instructions Generator Operational Features and ControlsRecommended Applications WelderWELDER/GENERATOR Controls Controls and SettingsFigure B.2 Current Controls Control of Welding CurrentReturn Section TOC Gasoline Engine ControlsEngine Operation Before Starting the EngineStarting the Engine Stopping the Engine Cold Weather StartingBREAK-IN Period After you finish welding Welding OperationTable B.1 Range Settings for Wire SIZE/SPEED Auxiliary PowerTable of Contents Accessories Semiautomatic Welding Accessories OPTIONS/ACCESSORIESClassic I Across the ARC with Connection of Lincoln Electric Wire FeedersWire Feed Module see Figure C.1 Connection of the LN-25 toClassic 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 Tool. See Figure D.4 After cleaning or when installing a new spark plugGap Specifications 0.032 inch .8 mm Set the terminal gap with a feeler gauge or gappingClassic 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 BATTERY, STARTER, Engine Alternator and OIL Switch Circuit Theory of OperationGeneral Description ENGINE, Main Generator Armature and Frame and DC Exciter Excitation FlashingMain SHUNT, Interpole and Series Coils Fine Current Adjustment Current Range SelectorEngine Idler Circuit 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 ProceduresTroubleshooting Guide Observe Safety GuidelinesDetailed in the beginning of this manual Shunt Field Winding Test Main Generator Throttle Adjustment Test Output Problems Function Problems Troubleshooting & Repair Engine Problems Welding Problems DC Exciter Test Test DescriptionMaterials Needed 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 Scope Settings Normal Open Circuit Voltage Waveform 115VDC SupplyHigh Idle no Load Fine Current Control Rheostat AT Maximum 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 Removal Procedure ReassemblyDC Exciter Armature and Field Coils 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 RemovalWelder DC Output DC Auxiliary Power Receptacle OutputRetest After Repair Engine 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
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