Lincoln Electric SVM208-A service manual Generator Operation

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B-6

OPERATION

B-6

 

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STOPPING THE ENGINE

1.Remove all welding and generator power loads and let the engine cool by running it for several minutes.

2.Stop the engine by placing the “ON/OFF” switch in the “OFF”(O) position.

3.Close the fuel shutoff valve.

WARNING

Close the fuel valve when the machine is trans- ported to prevent fuel leakage from the carburetor.

For long periods of storage, turn off the fuel shut- off valve and let the engine run until there is no more fuel in the line. Use a fuel additive such as Sta-Bil to minimize fuel gum deposits.

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RUNNING THE ENGINE

The engine is set at the factory to run at high idle speed when not under load. You should not adjust this setting yourself.

BREAK-IN PERIOD

The engine will use a greater amount of oil during its “break-in” period. Check the oil frequently during break-in. For more details, see the MAINTENANCE section in the engine owner’s manual.

CAUTION

During break-in, the unit should be subjected to moderate loads. Before stopping the engine, remove all loads and allow the engine to cool sev- eral minutes.

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LOW OIL SENSING

This engine has a built in sensor which responds to low oil level (not pressure). When activated, the system will shut the engine down. The engine will not restart untill sufficient oil is added. Check oil level frequently and add oil as required to the full mark on the dipstick. (DO

NOT OVERFILL)

GENERATOR OPERATION

CAUTION

Be sure that any electrical equipment plugged into the generator’s AC power receptacles can with- stand a ±10% voltage and a ±4% frequency varia- tion. Some electronic devices cannot be powered by the Bulldog® 140. Refer to Table A.2, ELECTRI- CAL DEVICE USE WITH THE Bulldog® 140, in the INSTALLATION section of this manual.

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GENERAL INFORMATION

The Bulldog® 140 generator is rated at 4000 continu- ous watts (5500 surge watts). It provides both 120 volt and 240 volt power. You can draw up to 20 amps from either side of the 120 volt duplex receptacle, but no more than 33.3 amps from both sides at once. Up to

16.7amps can be drawn from the single 240 volt receptacle.

Electrical loads in watts are approximately calculated by multiplying the voltage rating of the load by the num- ber of amps it draws. (This information is given on the load device nameplate.) For example, a device rated 120 volts, 2 amps will need 240 watts of power (120 x 2 = 240).

You can use Table B.1, GENERATOR POWER APPLICATIONS, to determine the wattage require- ments of the most common types of loads you can power with the Bulldog® 140. Be sure to read the notes at the bottom of the table.

TO USE THE Bulldog® 140 AS AN AUXILIARY POWER SUPPLY:

1.Start the gasoline engine. See ENGINE OPERA- TION in this section of the manual and the engine owner’s manual.

2.Set the current control dial on the output control panel to “GENERATOR”. See Figure B.1.

3.Plug the load(s) into the appropriate 120 volt or 240 volt power receptacle.

NOTE: During welding, the maximum generator out- put for auxiliary loads is 100 watts.

NOTE: You can supply multiple loads as long as the total load does not exceed 5,500 surge watts or 4,000 Continuous watts. Be sure to start the largest loads first.

BULLDOG® 140

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Contents Bulldog Safety California Proposition 65 WarningsElectric Shock can kill ARC Rays can burn Can be dangerousCylinder may explode if damaged Welding and Cutting Sparks can cause fire or explosionIii 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 K2708-1Storing Safety PrecautionsLocation and Ventilation Engine Exhaust can killTilting PRE-OPERATION Engine ServiceStacking OILWelding Cable Connections Electrical Output CONNEC- TionsTable A.1 Recommended Welding Cable Size and Length Electrical Connections Auxiliary Power ReceptaclesCable Installation Plugs and HAND-HELD EquipmentPremises Wiring Circuit BreakersAtion. do not RUN These BulldogTable of Contents Operation Section Operation WELDER/GENERATOR Controls LimitationsOutput Panel Controls Engine Operation Gasoline Engine ControlsBefore Starting the Engine Starting the EngineGenerator Operation Table B.1 Generator Power Applications Welding Operation Control Function / OperationStick Welding Material Thickness Electrode Type Size SettingWelding Guidelines Learning To Stick WeldWhat Happens in the Arc? Correct Welding Position Side viewDo the following PracticeUse the following Butt JointsFillet Joints PenetrationVertical-Up Welding Vertical-Down WeldingWelding Sheet Metal How to Hardface the Sharp Edge Metal to Ground WearOverhead Welding Hardfacing To Reduce WearWelding Cast Iron Cast Iron Plate PreparationLow Hydrogen Group AWS E7018 High-Speed Group AWS E6013Out-of-Position Group AWS E6011 Bulldog Table of Contents Accessories Section OPTIONS/ACCESSORIES AccessoriesLincoln Electric Accessories Table of Contents Maintenance Section Maintenance Engine Maintenance Routine and Periodic MaintenanceLocation Engine Adjustments Return to Section TOC To Section TOCSpark Plug Service Table D.1 Engine Maintenance PartsOperational Clearance 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 Test Description Rotor Voltage TestMaterials Needed Rotor Voltage Test ProcedureLead 200A Connection Ground Stud 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 Strobe-tach Method Engine Throttle Adjustment TestROBIN/SUBARU Engine Frequency Counter MethodHigh Speed Stop Screw Scope Settings Normal Open Circuit Voltage Waveform 115VAC Supply High Idle no LoadMachine Loaded Typical Weld Output WaveformMachine Loaded to 125 Amps AT 23 VAC 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 Procedure Capacitor Removal and Replacement Removal and ReplacementCapacitor AND/OR Diode Bridge 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 Engine Output Auxiliary Power Receptacle OUTPUT1Retest After Repair WELDER/GENERATOR OUTPUT1Bulldog Table of Contents Diagram Section Wiring Diagram Bulldog S28101