Lincoln Electric SVM194-A specification

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G-26

ELECTRICAL DIAGRAMS

G-26

SCHEMATIC - CURRENT SENSOR PC BD (KUBOTA ENGINE ONLY) - (S25973)

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NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.

CLASSIC® 300D & 300G

Image 232

Lincoln Electric SVM194-A service manual Schematic Current Sensor PC BD Kubota Engine only S25973

Contents

Classic 300 D & 300 G Safety Powered equipmentFor Engine Electric Magnetic Fields Electric Shock can kill ARC Rays can burn Fumes and GasesCan be dangerous Classic 300D & 300G For Electrically Cylinder may explodeIii Précautions DE Sûreté Précautions DE Sûreté PourLES Machines À Souder À Transformateur ET À Electromagnetic Compatibility EMC L10093 3-1-96H Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Classic 300DWelding Output Open Circuit Output Range Auxiliary Power Height Width Depth Weight Optional Features Design FeaturesRated Output Duty Cycle PRE-OPERATION Installation PRE TrailerDiesel Fuel Vehicle Mounting Battery Charging Engine BREAK-INTo prevent Explosion when To prevent Electrical Damage when Table of Contents Operation Section Operation Engine OperationSee additional warning information at Cold Weather Starting Welder Operation See Specifications forDo not Turn the Current Range Selec Auxiliary Power B1.4 Table of Contents Accessories Section Accessories Optional FeaturesMaintenance section TIG Options Wire Feed Module K623-1 Provides constant volt C1.3Magnum 250 Innershield Gun for LN-23P Spool GUN Welder C1.4 Classic 300D & 300G Table of Contents Maintenance Section Maintenance Maintenance Idler Maintenance Purging Air from Fuel System PerkinsEngine Nameplates D1.4 For Codes 10658 and below D1.5 For Codes 10911 and Above Resetting Procedure D1.6 Figure D1.7 Major Component Location D1.7 D1.8 Classic 300D & 300G A2.1 Description Rated DC Output Model Height Width Depth WeightDC Current Range Volts @ Rated Amps Cycle When starting and stopping welding or using auxil A2.3Engine Muffler Machine Grounding Exhaust Spark ArresterLift Bail Do not Mount Over Combustible SU PRE-OPERATION Service OILFuel Polarity Control and Cable Sizes Cooling System Battery Charging A2.6 Gases from Battery can explodeBattery Acid can burn eyes Skin A2.6 B2.1 Maintenance sec High Altitude OperationStopping the Engine Starting the Classic 300D Perkins Contacts and damage the switch B2.3 Idler Operation Auxiliary Power B2.4 C2.1 TIG Options General Options Stick Options Accessory SET K704Trailer K953-1 Wire Feed Module K623-1 Magnum Spool Gun K487-25 Wire Feeder OptionsC2.3 C2.4 Classic 300D & 300G D2.1 Safety Precautions Information at Idler Maintenance Purging AIR from Fuel SystemPerkins 404C-22 Engine Nameplates Service Decal for Codes 11249 and below D2.4Tension of alternator drive belt All nuts and bolts for tightness Service Decal for Codes 11250 and Above MAINTENANCED2.5D2.5 D2.6MAINTENANCED2.6 Gfci Receptacle Testing and Reset Ting Procedure Case Front Assembly D2.7 D2.8 Classic 300D & 300G A3.1 Technical Specifications Classic 300D Kubota A3.2 Control Panel High Idle RPM OCV Adjustment A3.3 This operatorʼs manual Angle of OperationNot Mount Over Combustible Surfaces Falling Polarity Control and Cable Sizes Fuel GAS ES from Battery can explode Battery Charging WarningA3.6 B3.1 Starting the Classic 300D Kubota V2203M Diesel Engine B3.3 Control of Welding Current B3.4 Idler Operation C3.1 TIG Options Stick Options Wire Feed Options C3.3 C3.4 Classic 300D & 300G D3.1 D3.2 Kubota V2203M Engine D3.3Air Bleeding Valve Engine Service D3.4 D3.5MAINTENANCED3.5 Figure D3.6 Major Component Location D3.6 A4.1 A4.2 General Description A4.3 See Optional Features A4.4 Read the engine operating and maintenance A4.5Instructions supplied with this machine Can A4.6 B4.1 B4.2 404D-22 Diesel Engine Selector setting and lower open circuit voltage B4.3 B4.4 C4.1 Power Plug Kit K802D Service Indicator Kit K1858-1 Water Valve Kit K844-1C4.2 Ball Hitch K958-1 K958-2 Control Cable Extension K937-45 Magnum Spool Gun K487-25 Wire Feed Module K623-1 C4.3 C4.4 Classic 300D & 300G D4.1 D4.2 Perkins 404D-22 Engine D4.3 MAINTENANCED4.4 D4.4 D4.5MAINTENANCED4.5 Figure D4.6 Major Component Location D4.6 A5.1 A5.2 Technical Specifications Classic 300G K1754-1Description Rated DC Output Duty Cycle DC Current Range Exhaust Spark Arrester Lift Bail Do not Mount Over Combustible SUR Gasoline Vehicle Mounting A5.5 A5.6 Classic 300D & 300G B5.1 Design Features Starting and stopping welding or using auxiliaryB5.2 Do not Mount Over Combustible Surfaces High Idle RPM OCV Adjustment- a potentiometer is B5.3Refer to the Engine Starting the Classic 300G GM 3.0L Throttle Body Deicing System B5.4Idler Control Operation C5.1 Optional Equipment C5.2 D5.1 Commutator and Brushes BearingsGeneral Instructions Idler Control Maintenance Engine MaintenancePurging AIR from Fuel System GM 0L Engine Engine Service D5.4 Figure D5.5 Major Component Location D5.5 D5.6 Classic 300D & 300G 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Gasoline Engine Perkins BATTERY, STARTER, Engine Alternator & Protection Circuits Classic 300G, Zenith Fuel System/GM Engine Classic 300D, Perkins Engine Classic 300D, Kubota Engine Fine Current Adjustment Adjustment CoilsTOR and Rotor Excitation Flashing Figure E.8 Classic 300D, Perkins Engine 11472, Engine Idler Circuit 11135 10657, 10658, 10911, Theory of Operation DC Generator Machines Classic 300D & 300G Troubleshooting and Repair Table of Contents HOW to USE Troubleshooting Guide Locate Problem SymptomRecommended Perform External Tests PC Board Troubleshooting Procedures Electric Shock Adjustment Test Ring Service ProcedurePerform the Brush and Slip Perform the Flash Voltage Service Procedure Generator BrushCommutator Inspection Shunt Field Coil Output takes a long time to Weld output is considerably Adjustment Procedure if Rocker AdjustmentPerform the Shunt Field Coil RPM Adjustment Test Slip Ring ServiceProcedure Exciter Rotor Resistance and Ground Test Shunt Field Coil Welding Brush and SlipFlash Voltage Engine will not crank when Function Problems System Voltage Tests Verify that the engine control Protection System Test Perform the Engine Alternator Machine will not idle down Kubota powered units For Classic 300G Engine goes to low idle, but Kubota powered Classic Perkins powered models Classic 300G Classic 300D Kubota Powered machines Troubleshooting and Repair 23TROUBLESHOOTING and REPAIRF-23 Brush & Slip Ring Service ProcedureExciter/Auxiliary Power Alternator Procedure Description 24TROUBLESHOOTING and REPAIRF-24 ProcedureCleaning the Slip Rings Seating Brushes Engine Alternator Test Procedure 25TROUBLESHOOTING and REPAIRF-25Test Description Engine Alternator Test Procedure 27TROUBLESHOOTING and REPAIRF-27 Engine Fuel System Voltage Test Procedure Engine Fuel System Voltage Test Procedure 29TROUBLESHOOTING and REPAIRF-29 Engine Protection System Test Procedure Engine Protection System Test Procedure Warranty will not Cover the DamageTED to RUN White Overheated or with TOW OIL PRESSURE, Severe Engine DAM Engine RPM Adjustment Test Procedure 31TROUBLESHOOTING and REPAIRF-31Materials Needed Miscellaneous hand tools Strobe tachometer Engine RPM Adjustment Test Procedure Engine RPM Adjustment Procedure later in this sectionClassic 300D Perkins only Strobe-Tach Method Low idle adjustment Classic 300D & 300G 35TROUBLESHOOTING and REPAIRF-35 Flashing Voltage Test Procedure Flashing Voltage Test Procedure Rocker Adjustment Procedure 38TROUBLESHOOTING and REPAIRF-38 Rocker Adjustment ProcedureInitial rocker placement Tighten Check for Max output Classic 300D & 300G Exciter Rotor Resistance and Ground Tests Procedure 41TROUBLESHOOTING and REPAIRF-41Exciter / Auxiliary Power Alternator Static Tests 42TROUBLESHOOTING and REPAIRF-42Dynamic Tests 43TROUBLESHOOTING and REPAIRF-43 Classic 300D & 300G 45TROUBLESHOOTING and REPAIRF-45 Shunt Field Coil Resistance and Ground Test Procedure Shunt Field Coil Resistance and Ground Test Shunt coil ground testTest the shunt coil resistance Shunt Field Coil Resistance and Ground 47TROUBLESHOOTING and REPAIRF-47 Shunt Field Circuit Voltage Test Procedure Shunt Field Circuit Voltage Test Procedure 49TROUBLESHOOTING and REPAIRF-49 Exciter Stator Short Circuit & Ground Test Procedure Exciter Stator Short Circuit & Ground Test Procedure Weld Circuit Ground and Short Circuit Test Procedure Weld circuit ground test If the resistance is lower than 500k Ohms 53TROUBLESHOOTING and REPAIRF-53 54TROUBLESHOOTING and REPAIRF-54 Inspection and Service ProcedureWelding Generator Brush and Commutator Perform the Weld Circuit Ground and Short Circuit Test 55TROUBLESHOOTING and REPAIRF-55 Pitted and Are Damaged CommutatorUneven Commutator appearance Examine the brushes Classic 300D & 300G 57TROUBLESHOOTING and REPAIRF-57 Series Coil Short Circuit Test Procedure Series Coil Short Circuit Test Procedure Scope Settings High Idle no Load Fine Current Control Rheostat AT Maximum16.6 ms CH1 60TROUBLESHOOTING and REPAIRF-60 Normal Open Circuit DC Weld Voltage Waveform Machine Loaded Selector Switch AT Maximum Position 61TROUBLESHOOTING and REPAIRF-61Typical DC Weld Output Voltage Waveform Classic 300D & 300G 63TROUBLESHOOTING and REPAIRF-63 Alternator Rotor Removal Replacement ProcedureDescription Materials Needed 3/8 wrench Replacement Procedure 64TROUBLESHOOTING and REPAIRF-64Alternator Rotor Removal Troubleshooting and Repair 66TROUBLESHOOTING and REPAIRF-66 Figure F.6 Rotor Removal Replacement Procedure Replacement Classic 300D & 300G Alternator Stator Removal and Replacement Procedure 69TROUBLESHOOTING and REPAIRF-69Materials Needed 3/8 nut driver 70TROUBLESHOOTING and REPAIRF-70 Alternator Stator Removal and ReplacementProcedure Perform the Alternator Rotor Removal 71TROUBLESHOOTING and REPAIRF-71 Figure F.8 Lead Disconnection Points Replacement Genernator Brush HOLDER/COIL Cables 73TROUBLESHOOTING and REPAIRF-73 Rotor Removal and Replacement pro Classic 300D & 300G 75TROUBLESHOOTING and REPAIRF-75 Generator Frame Removal and Replacement Procedure 76TROUBLESHOOTING and REPAIRF-76 Removal and ReplacementGenerator Frame Perform the Alternator Stator Removal Removal and Replacement 78TROUBLESHOOTING and REPAIRF-78 See Figure F.14 for steps 14 79TROUBLESHOOTING and REPAIRF-79 Rope Sling 80TROUBLESHOOTING and REPAIRF-80 81TROUBLESHOOTING and REPAIRF-81 Generator Armature Removal and Replacement Procedure Removal and Replacement Procedure 82TROUBLESHOOTING and REPAIRF-82Generator Armature Current Rheostat at Maximum AC Auxiliary Power Receptacle OutputRPM Classic 300D & 300G Table of Contents Diagram Section Electrical Diagrams Wiring Diagram Codes 10545, 10546, 10657, 10658 L10877 Classic 300G Wiring Diagram Classic 300D Wiring Diagram Wiring Diagram Codes 10911, 10927 L11865 Classic 300G Wiring Diagram Wiring Diagram Codes 10912, 11135 L11866 Classic 300D Perkins Wiring Diagram Wiring Diagram Codes 11110, 11111 M20499 Classic 300D Kubota Wiring Diagram Wiring Diagram Codes 11112, 11113 M20432 Wiring Diagram Codes 11243, 11244 M20432-1 OU Tput Terminals Wiring Diagram Codes 11248, 11249, 11280, 11281 M20616 Wiring Diagram Codes 11411, 11412 M21292 Wiring Diagram Codes 11413, 11414 M21293 Wiring Diagram Codes 11472, 11473 M21684 Wiring Diagram Codes 11474, 11475 M21563 To Iron Schematic Complete Machine Codes 11110, 11111 L12412 L12412 Schematic Complete Machine Codes 11112, 11113 L12265 L12265 Schematic Complete Machine Codes 11243, 11244 L12265-1 L12265-1 L12561 Lower Left Machine Schematic Complete Machine Codes 11411, 11412 L13096 L13096 Schematic Complete Machine Codes 11413, 11414 L13097 L13097 Schematic Complete Machine Codes 11472, 11473 L13672 L13672 Schematic Complete Machine Codes 11474, 11475 L13351 L13351 Wire Feed Module Wiring Diagram Wiring Diagram Wire Feed Module Option L9259 Schematic Wire Feed Module Option G2562 Classic 300D & 300G Electrical Diagrams Schematic Current Sensor PC BD Kubota Engine only S25973