Lincoln Electric SVM208-A service manual Engine Operation, Gasoline Engine Controls

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B-4

OPERATION

B-4

 

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GASOLINE ENGINE CONTROLS

Refer to your engine manual for the location of the fol- lowing features:

1.FUEL SHUTOFF VALVE: Stops the flow of gaso- line from the fuel tank to the carburetor. Should be closed whenever you are finished using the Bulldog® 140. Must be opened before you start the engine.

2.FUEL TANK AND CAP: See TECHNICAL SPECI- FICATIONS for capacity.

NOTE: If you use any other alternate fuel tank or supply, be sure to use a recommended in- line fuel filter.

3.MUFFLER: Reduces engine noise output.

See SPARK ARRESTER in the INSTALLATION section of this manual.

4.“ON/OFF Switch: A two position switch located on the rear of the engine. In the “ON”(I) position, the engine ignition circuit is energized and the engine can be started by pulling the recoil rope starter. In the “OFF”(O) position, the electronic ignition is grounded and the engine shuts down.

5.AIR CLEANER: Filters intake air to the carburetor. See ENGINE MAINTENANCE in the MAINTE- NANCE section of the engine owner’s manual for details about the specific type of air cleaner to use.

6.CHOKE: Provides a richer air/fuel mixture for cold engine starting conditions. See the topic ENGINE OPERATION, for details on setting the choke.

7.RECOIL STARTER: Manual, rope-type starter. The handle position allows

easy starting from either ground level or pickup-truck level

8.OIL DRAIN PLUG: Permits convenient draining of engine oil during maintenance. Both sides of the engine are equipped with an oil drain plug.

9.OIL FILL PLUG: Permits convenient filling of engine oil during maintenance. Both sides of the engine are equipped with an oil fill plug.

ENGINE OPERATION

WARNING

DO NOT RUN THE ENGINE AT EXCESSIVE SPEEDS. The maximum allowable high idle speed for the Bulldog® 140 is 3750 RPM, no load. Do NOT adjust the governor screw on the engine. Severe personal injury and damage to the machine can result if it is operated at speeds above the maximum rated speed.

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Read and understand all safety instructions included in the engine manufacturer’s Operating and Maintenance Instructions manual that is shipped with the Bulldog® 140.

BULLDOG® 140

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Contents Bulldog Safety California Proposition 65 WarningsElectric Shock can kill ARC Rays can burn Can be dangerousIii Welding and Cutting Sparks can cause fire or explosionCylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcSafety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Bulldog 140 K2708-1Safety Precautions Location and VentilationStoring Engine Exhaust can killPRE-OPERATION Engine Service StackingTilting OILTable A.1 Recommended Welding Cable Size and Length Electrical Output CONNEC- TionsWelding Cable Connections Auxiliary Power Receptacles Cable InstallationElectrical Connections Plugs and HAND-HELD EquipmentPremises Wiring Circuit BreakersAtion. do not RUN These BulldogTable of Contents Operation Section Operation Output Panel Controls LimitationsWELDER/GENERATOR Controls Engine Operation Gasoline Engine ControlsBefore Starting the Engine Starting the EngineGenerator Operation Table B.1 Generator Power Applications Welding Operation Control Function / OperationMaterial Thickness Electrode Type Size Setting Welding GuidelinesStick Welding Learning To Stick WeldWhat Happens in the Arc? Correct Welding Position Side viewPractice Use the followingDo the following Butt JointsFillet Joints PenetrationVertical-Up Welding Vertical-Down WeldingHow to Hardface the Sharp Edge Metal to Ground Wear Overhead WeldingWelding Sheet Metal Hardfacing To Reduce WearWelding Cast Iron Cast Iron Plate PreparationOut-of-Position Group AWS E6011 High-Speed Group AWS E6013Low Hydrogen Group AWS E7018 Bulldog Table of Contents Accessories Section Lincoln Electric Accessories AccessoriesOPTIONS/ACCESSORIES Table of Contents Maintenance Section Maintenance Location Routine and Periodic MaintenanceEngine Maintenance Engine Adjustments Return to Section TOC To Section TOCOperational Clearance Table D.1 Engine Maintenance PartsSpark Plug Service GENERATOR/WELDER Maintenance Screws BrushesFigure D.7. Major Component Locations Bulldog 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation ENGINE, EXCITATION, Rotor StatorRotor Field Feedback Auxiliary Power Figure E.3 Rotor Field Feedback and Auxiliary PowerAuxiliary Power Overcurrent Protection Weld Winding and Reactor1TABLE of Contents Troubleshooting and Repair F-1 Troubleshooting and Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Output Problems Electric Authorized Field Ser vice Facility Perform the Rotor Voltage TestProblems Symptoms Troubleshooting and Repair Perform Field Diode Test Engine Problems Troubleshooting and Repair Engine Throttle Adjustment Test Bulldog Materials Needed Rotor Voltage TestTest Description Lead 200A Connection Ground Stud ProcedureRotor Voltage Test Field Diode Bridge Test Field Diode Bridge Test + ~Rotor Flashing Circuit Test Rotor Flashing Circuit Test Figure F.3 Brush Holder Leads 201- and 202B +Moving Parts can injure Bulldog Rotor Resistance Test Rotor Resistance Test Cable TIE Brushes Figure F.6 Brushes Retained with Cable TIEBulldog Engine Throttle Adjustment Test ROBIN/SUBARU Engine Engine Throttle Adjustment Test ROBIN/SUBARU EngineStrobe-tach Method Frequency Counter MethodHigh Speed Stop Screw Scope Settings Normal Open Circuit Voltage Waveform 115VAC Supply High Idle no LoadMachine Loaded to 125 Amps AT 23 VAC Typical Weld Output WaveformMachine Loaded Brush Removal and Replacement Brush Removal and Replacement Cable TIE BrushesReturn to Section Return to Section TOC Bulldog Rheostat Removal and Replacement Rheostat Removal and Replacement Figure F.11 Rheostat RemovalCapacitor AND/OR Diode Bridge Removal and Replacement Capacitor AND/OR Diode Bridge Removal and ReplacementProcedure Capacitor Removal and Replacement Procedure Field Diode Bridge Removal and Replacement Figure F.13 Field Diode Bridge LocationBulldog STATOR/ROTOR Removal and Replacement InstructionsSTATOR/ROTOR Removal and Replacement GeneratorengineFigure F.15 Generator Components Troubleshooting and Repair Stator Removal Procedure Figure F.16 Output Lead Location TIE Wrap TerminalsThru Bolts Support NutsRotor Removal Procedure Reassembly ProcedureFigure F.19 Checking ROTOR-STATOR AIR GAP Auxiliary Power Receptacle OUTPUT1 Retest After RepairEngine Output WELDER/GENERATOR OUTPUT1Bulldog Table of Contents Diagram Section Wiring Diagram Bulldog S28101