Lincoln Electric SVM 113-A service manual Figure F.12 Idle Speed Adjustment Screw Locations

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F-28

F-28

TROUBLESHOOTING & REPAIR

ENGINE THROTTLE ADJUSTMENT TEST (continued)

FIGURE F.12 - IDLE SPEED ADJUSTMENT SCREW LOCATIONS

HIGH IDLE INCREASE SPEED SCREW

HIGH IDLE DECREASE SPEED SCREW

GOVERNOR CONTROL LEVER

CARBURETOR THROTTLE LEVER

LOW IDLE SPEED SCREW

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5.ADJUST HIGH IDLE: With the Idler Switch set on HIGH, the tach should read between 3700 and 3800 RPM.

a.If the engine speed is above 3800 RPM, turn the High Idle Increase Speed screw counter-clockwise sev- eral turns. Turn the High Idle Decrease Speed screw clockwise until the engine speed is between 3700 and 3800 RPM. See Figure F.12.

Next, turn the High Idle Increase Speed screw clockwise until the screw contacts the tab on the Governor Control Lever. Do NOT tighten the screw any further, as this may cause the tab to bend. See Figure F.12.

b.If the engine speed is below 3700 RPM, turn the High Idle Decrease Speed screw counter-clockwise sev- eral turns. Turn the High Idle Increase Speed screw clockwise until the engine speed is between 3700 and 3800 RPM. See Figure F.12.

Next, turn the High Idle Decrease Speed screw clockwise until the screw contacts the tab on the Governor Control Lever. Do NOT tighten the screw any further, as this may cause the tab to bend. See Figure F.12.

c.After the adjustments are made, try to move the Governor Control Lever. There should be no move- ment. The two high idle speed screws are designed to work against opposite sides of the Governor Control Lever tab so that no movement (and therefore no increase in speed) is possible.

6.ADJUST LOW IDLE: Using a piece of dowel rod or a long screw driver, push the gover- nor arm back until the Carburetor Throttle Lever rests against the Low Idle Speed screw. See Figure F.12. You can also push the arm back with your hand, but this is not recommended because you could be burned by the hot muffler. Adjust the Low Idle Speed screw until the engine speed is 2075 + 75 RPM.

Set the Idler Switch on AUTO. The engine should go to low idle in about 12 seconds.

Use the 3/8" wrench to turn the adjustment nut on the idler solenoid plunger, which changes the amount of throw in the gover- nor arm. See Figure F.13. for location of the adjustment nut. Adjust the nut until the tach reads between 2250 and 2500 RPM.

WELDANPOWER 125

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Contents Weldanpowertm Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications WeldanpowerSafety Precautions Location and VentilationStoring PRE-OPERATION Engine Service Electrical Output Connections Welding Cable ConnectionsAuxiliary Power Receptacles Machine GroundingPlugs and HAND-HELD Equipment Premises Wiring Circuit BreakersThese Devices Without Table of Contents Operation Section Operating Instructions Safety InstructionsOperation General DescriptionRecommended Applications Operational Features and ControlsDesign Features Advantages Welding CapabilityControls and Settings WELDER/GENERATOR ControlsGasoline Engine Controls Figure B.2 Gasoline Engine ControlsEngine Operation Before Starting the EngineStarting the Engine Stopping the Engine For Best Engine StartingGeneral Information Welding OperationBREAK-IN Period LOW OIL SensingTo USE the Weldanpower 125 for WELD- ING TIG WeldingTable B.2 Electrode Selection Guide Auxiliary Power To USE the Weldanpower 125 AS AN Auxiliary Power SupplyTable B.3 Generator Power Applications Table of Contents Accessories OPTIONS/ACCESSORIES Lincoln Electric AccessoriesBriggs and Stratton Accessories Table of Contents Maintenance Routine and Periodic Maintenance Engine MaintenanceFigure D.3 Clean Finger Guard MaintanenceFigure D.5 SET Spark Plug GAP WELDER/GENERATOR Maintenance Table D.2 Engine Maintenance PartsFigure D.6 Major Component Locations Table of Contents Theory of Operation Section ENGINE, EXCITATION, Rotor and Stator Idler BoardRotor Field Feedback Auxiliary Power Engine Idle Control Auxiliary Power Overcurrent ProtectionWeld WINDING, Output Rectifier and Choke Figure E.4 Weld WINDING, Output Rectifier and ChokeTable of Contents Trouble Shooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Electric Shock can killTroubleshooting Guide Output ProblemsOutput Rectifier Troubleshooting & Repair Perform the Engine Throttle Engine Problems Main Stator Winding Test Engine Throttle Adjustment Troubleshooting & Repair Weldanpower Rotor Voltage Test Test DescriptionMaterials Needed Test Procedure Rotor Voltage TestRotor Resistance Test Rotor Resistance Test Figure F.3 Brushes Retained with Cable TIE Output Rectifier Bridge Test Output Rectifier Bridge Test Main Stator Test Main Stator Test Figure F.6 Main Stator Molex Plug Test Points Rotor Flashing Circuit Test Rotor Flashing Circuit Test WP125 Idler Engine Throttle Adjustment Test Test Procedure Figure F.12 Idle Speed Adjustment Screw Locations Figure F.13 LOW Idle Adjustment NUT on Idler Solenoid TOC Scope Settings Normal Open Circuit Weld Voltage WaveformHigh Idle no Load Output Control AT Maximum Normal Open Circuit Voltage Waveform 115 VAC Supply Typical Weld Output Waveform Machine LoadedMachine Loaded to 125 Amps AT 25 VAC Abnormal Open Circuit Weld Voltage Waveform Brush Removal and Replacement DescriptionProcedure Figure F.14 Brushes Retained with Cable TIEProcedure Rheostat Removal and Replacement Rheostat Removal and Replacement Field Capacitor Removal and Replacement Field Capacitor Removal and Replacement Field Diode Bridge Removal and Replacement Field Diode Bridge Removal and Replacement Figure F.18 Field Diode Bridge Location Idler Printed Circuit Board Removal Replacement Carefully remove the board Output Rectifier Bridge Removal Replacement Output Rectifier Bridge Removal and Replacement Troubleshooting & Repair Output Choke Removal and Replacement Output Choke Removal and Replacement Section TOC STATOR/ROTOR Removal and Replacement InstructionsStator Removal Procedure Troubleshooting & Repair Rotor Removal Procedure Reassembly ProcedureFigure F.24 Checking ROTOR-STATOR AIR GAP Feeler Gauge Troubleshooting & Repair Engine Output Auxiliary Power Receptacle OUTPUT1Retest After Repair WELDER/GENERATOR OUTPUT1Weldanpower Table of Contents Diagrams Section Wiring Diagram Code 10158 Diagrams SchematicIdler PC Board M17578 Dimension Print Weldanpower Weldanpower M17578 Idler PC Board M17578-1M17578 Idler PC Board Bill of Materials DescriptionWeldanpower
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