41TROUBLESHOOTING and REPAIRF-41 | Lincoln Electric SVM194-A

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F-41TROUBLESHOOTING AND REPAIRF-41

EXCITER ROTOR RESISTANCE AND GROUND TESTS PROCEDURE

(Exciter / Auxiliary Power Alternator)

WARNING

Service and repair should be performed only by Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical trou- bleshooting assistance before you proceed. Call 1-888-935-3877.

TEST DESCRIPTION

This test will determine if the exciter / auxiliary power alternator rotor winding is open, shorted, or grounded.

MATERIALS NEEDED

Miscellaneous hand tools

Ohmmeter (Analog type meter required for dynamic resistance test.)

Wiring diagram

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CLASSIC® 300D & 300G

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Lincoln Electric SVM194-A 41TROUBLESHOOTING and REPAIRF-41, Exciter Rotor Resistance and Ground Tests Procedure

Contents

Classic 300 D & 300 G Electric Magnetic Fields SafetyPowered equipment For Engine Classic 300D & 300G Electric Shock can kill ARC Rays can burnFumes and Gases Can be dangerous For Electrically Cylinder may explodeIii Transformateur ET À Précautions DE SûretéPrécautions DE Sûreté Pour LES Machines À Souder À Electromagnetic Compatibility EMC L10093 3-1-96H Master Table of Contents for ALL Sections Table of Contents Installation Section Height Width Depth Weight InstallationTechnical Specifications Classic 300D Welding Output Open Circuit Output Range Auxiliary Power Optional Features Design FeaturesRated Output Duty Cycle PRE-OPERATION Installation Vehicle Mounting PRETrailer Diesel Fuel To prevent Electrical Damage when Battery ChargingEngine BREAK-IN To prevent Explosion when Table of Contents Operation Section Cold Weather Starting OperationEngine Operation See additional warning information at Welder Operation See Specifications forDo not Turn the Current Range Selec B1.4 Auxiliary Power Table of Contents Accessories Section TIG Options AccessoriesOptional Features Maintenance section Spool GUN Welder Wire Feed Module K623-1 Provides constant voltC1.3 Magnum 250 Innershield Gun for LN-23P C1.4 Classic 300D & 300G Table of Contents Maintenance Section Maintenance Maintenance Nameplates Idler MaintenancePurging Air from Fuel System Perkins Engine For Codes 10658 and below D1.4 For Codes 10911 and Above D1.5 D1.6 Resetting Procedure D1.7 Figure D1.7 Major Component Location D1.8 Classic 300D & 300G A2.1 Description Rated DC Output Model Height Width Depth WeightDC Current Range Volts @ Rated Amps Cycle Muffler When starting and stopping welding or using auxilA2.3 Engine Do not Mount Over Combustible SU Machine GroundingExhaust Spark Arrester Lift Bail Cooling System PRE-OPERATION ServiceOIL Fuel Polarity Control and Cable Sizes A2.6 Battery ChargingA2.6 Gases from Battery can explode Battery Acid can burn eyes Skin B2.1 Starting the Classic 300D Perkins Maintenance secHigh Altitude Operation Stopping the Engine B2.3 Contacts and damage the switch B2.4 Idler Operation Auxiliary Power 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 Information at Safety Precautions Nameplates Idler MaintenancePurging AIR from Fuel System Perkins 404C-22 Engine All nuts and bolts for tightness Service Decal for Codes 11249 and belowD2.4 Tension of alternator drive belt Service Decal for Codes 11250 and Above MAINTENANCED2.5D2.5 Gfci Receptacle Testing and Reset Ting Procedure D2.6MAINTENANCED2.6 D2.7 Case Front Assembly D2.8 Classic 300D & 300G A3.1 A3.2 Technical Specifications Classic 300D Kubota A3.3 Control Panel High Idle RPM OCV Adjustment Falling This operatorʼs manualAngle of Operation Not Mount Over Combustible Surfaces Polarity Control and Cable Sizes Fuel GAS ES from Battery can explode Battery Charging WarningA3.6 B3.1 Diesel Engine Starting the Classic 300D Kubota V2203M Control of Welding Current B3.3 Idler Operation B3.4 C3.1 Stick Options TIG Options C3.3 Wire Feed Options C3.4 Classic 300D & 300G D3.1 D3.2 Valve Kubota V2203M EngineD3.3 Air Bleeding D3.4 Engine Service D3.5MAINTENANCED3.5 D3.6 Figure D3.6 Major Component Location A4.1 A4.2 A4.3 General Description A4.4 See Optional Features Can Read the engine operating and maintenanceA4.5 Instructions supplied with this machine A4.6 B4.1 404D-22 Diesel Engine B4.2 B4.3 Selector setting and lower open circuit voltage B4.4 C4.1 Ball Hitch K958-1 K958-2 Control Cable Extension K937-45 Power Plug Kit K802DService Indicator Kit K1858-1 Water Valve Kit K844-1 C4.2 C4.3 Magnum Spool Gun K487-25 Wire Feed Module K623-1 C4.4 Classic 300D & 300G D4.1 D4.2 D4.3 Perkins 404D-22 Engine D4.4 MAINTENANCED4.4 D4.5MAINTENANCED4.5 D4.6 Figure D4.6 Major Component Location A5.1 A5.2 Technical Specifications Classic 300G K1754-1Description Rated DC Output Duty Cycle DC Current Range Do not Mount Over Combustible SUR Exhaust Spark Arrester Lift Bail Vehicle Mounting Gasoline A5.5 A5.6 Classic 300D & 300G B5.1 Do not Mount Over Combustible Surfaces Design FeaturesStarting and stopping welding or using auxiliary B5.2 Starting the Classic 300G GM 3.0L High Idle RPM OCV Adjustment- a potentiometer isB5.3 Refer to the Engine Throttle Body Deicing System B5.4Idler Control Operation C5.1 C5.2 Optional Equipment D5.1 Commutator and Brushes BearingsGeneral Instructions 0L Engine Idler Control MaintenanceEngine Maintenance Purging AIR from Fuel System GM D5.4 Engine Service D5.5 Figure D5.5 Major Component Location D5.6 Classic 300D & 300G 1TABLE of CONTENTS-THEORY of Operation Section E-1 Gasoline Engine Theory of Operation Perkins Classic 300G, Zenith Fuel System/GM Engine BATTERY, STARTER, Engine Alternator & Protection Circuits Classic 300D, Kubota Engine Classic 300D, Perkins Engine Excitation Flashing Fine Current AdjustmentAdjustment Coils TOR and Rotor Figure E.8 Classic 300D, Perkins Engine 11472, 11135 10657, 10658, 10911, Engine Idler Circuit Theory of Operation DC Generator Machines Classic 300D & 300G Table of Contents Troubleshooting and Repair Perform External Tests HOW to USE Troubleshooting GuideLocate Problem Symptom Recommended Electric Shock PC Board Troubleshooting Procedures Perform the Flash Voltage Adjustment TestRing Service Procedure Perform the Brush and Slip Shunt Field Coil Service ProcedureGenerator Brush Commutator Inspection Output takes a long time to Weld output is considerably Adjustment Procedure if Rocker AdjustmentPerform the Shunt Field Coil Exciter Rotor Resistance and Ground Test Shunt Field Coil RPM Adjustment TestSlip Ring Service Procedure 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 For Classic 300G Kubota powered units Engine goes to low idle, but Kubota powered Classic Classic 300G Classic 300D Kubota Powered machines Perkins powered models Troubleshooting and Repair Procedure Description 23TROUBLESHOOTING and REPAIRF-23Brush & Slip Ring Service Procedure Exciter/Auxiliary Power Alternator Seating Brushes 24TROUBLESHOOTING and REPAIRF-24Procedure Cleaning the Slip Rings Engine Alternator Test Procedure 25TROUBLESHOOTING and REPAIRF-25Test Description Engine Alternator Test Procedure Engine Fuel System Voltage Test Procedure 27TROUBLESHOOTING and REPAIRF-27 Engine Fuel System Voltage Test Procedure Engine Protection System Test Procedure 29TROUBLESHOOTING and REPAIRF-29 TOW OIL PRESSURE, Severe Engine DAM Engine Protection System Test ProcedureWarranty will not Cover the Damage TED to RUN White Overheated or with Engine RPM Adjustment Test Procedure 31TROUBLESHOOTING and REPAIRF-31Materials Needed Miscellaneous hand tools Strobe tachometer Strobe-Tach Method Engine RPM Adjustment Test ProcedureEngine RPM Adjustment Procedure later in this section Classic 300D Perkins only Low idle adjustment Classic 300D & 300G Flashing Voltage Test Procedure 35TROUBLESHOOTING and REPAIRF-35 Flashing Voltage Test Procedure Rocker Adjustment Procedure Tighten 38TROUBLESHOOTING and REPAIRF-38Rocker Adjustment Procedure Initial rocker placement 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 Shunt Field Coil Resistance and Ground Test Procedure 45TROUBLESHOOTING and REPAIRF-45 Shunt Field Coil Resistance and Ground Shunt Field Coil Resistance and Ground TestShunt coil ground test Test the shunt coil resistance Shunt Field Circuit Voltage Test Procedure 47TROUBLESHOOTING and REPAIRF-47 Shunt Field Circuit Voltage Test Procedure Exciter Stator Short Circuit & Ground Test Procedure 49TROUBLESHOOTING and REPAIRF-49 Exciter Stator Short Circuit & Ground Test Procedure Weld Circuit Ground and Short Circuit Test Procedure If the resistance is lower than 500k Ohms Weld circuit ground test 53TROUBLESHOOTING and REPAIRF-53 Perform the Weld Circuit Ground and Short Circuit Test 54TROUBLESHOOTING and REPAIRF-54Inspection and Service Procedure Welding Generator Brush and Commutator Examine the brushes 55TROUBLESHOOTING and REPAIRF-55Pitted and Are Damaged Commutator Uneven Commutator appearance Classic 300D & 300G Series Coil Short Circuit Test Procedure 57TROUBLESHOOTING and REPAIRF-57 Series Coil Short Circuit Test Procedure CH1 Scope SettingsHigh Idle no Load Fine Current Control Rheostat AT Maximum 16.6 ms Normal Open Circuit DC Weld Voltage Waveform 60TROUBLESHOOTING and REPAIRF-60 Machine Loaded Selector Switch AT Maximum Position 61TROUBLESHOOTING and REPAIRF-61Typical DC Weld Output Voltage Waveform Classic 300D & 300G Materials Needed 3/8 wrench 63TROUBLESHOOTING and REPAIRF-63Alternator Rotor Removal Replacement Procedure Description Replacement Procedure 64TROUBLESHOOTING and REPAIRF-64Alternator Rotor Removal Troubleshooting and Repair Figure F.6 Rotor Removal 66TROUBLESHOOTING and REPAIRF-66 Replacement Replacement Procedure Classic 300D & 300G Alternator Stator Removal and Replacement Procedure 69TROUBLESHOOTING and REPAIRF-69Materials Needed 3/8 nut driver Perform the Alternator Rotor Removal 70TROUBLESHOOTING and REPAIRF-70Alternator Stator Removal and Replacement Procedure Figure F.8 Lead Disconnection Points 71TROUBLESHOOTING and REPAIRF-71 Genernator Brush HOLDER/COIL Cables Replacement Rotor Removal and Replacement pro 73TROUBLESHOOTING and REPAIRF-73 Classic 300D & 300G Generator Frame Removal and Replacement Procedure 75TROUBLESHOOTING and REPAIRF-75 Perform the Alternator Stator Removal 76TROUBLESHOOTING and REPAIRF-76Removal and Replacement Generator Frame Removal and Replacement See Figure F.14 for steps 14 78TROUBLESHOOTING and REPAIRF-78 Rope Sling 79TROUBLESHOOTING and REPAIRF-79 80TROUBLESHOOTING and REPAIRF-80 Generator Armature Removal and Replacement Procedure 81TROUBLESHOOTING and REPAIRF-81 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 Wiring Diagram Codes 10545, 10546, 10657, 10658 L10877 Electrical Diagrams Classic 300G Wiring Diagram Wiring Diagram Codes 10911, 10927 L11865 Classic 300D Wiring Diagram Wiring Diagram Codes 10912, 11135 L11866 Classic 300G Wiring Diagram Wiring Diagram Codes 11110, 11111 M20499 Classic 300D Perkins Wiring Diagram Wiring Diagram Codes 11112, 11113 M20432 Classic 300D Kubota Wiring Diagram OU Tput Terminals Wiring Diagram Codes 11243, 11244 M20432-1 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 To Iron Wiring Diagram Codes 11474, 11475 M21563 L12412 Schematic Complete Machine Codes 11110, 11111 L12412 L12265 Schematic Complete Machine Codes 11112, 11113 L12265 L12265-1 Schematic Complete Machine Codes 11243, 11244 L12265-1 Lower Left Machine L12561 L13096 Schematic Complete Machine Codes 11411, 11412 L13096 L13097 Schematic Complete Machine Codes 11413, 11414 L13097 L13672 Schematic Complete Machine Codes 11472, 11473 L13672 L13351 Schematic Complete Machine Codes 11474, 11475 L13351 Wiring Diagram Wire Feed Module Option L9259 Wire Feed Module Wiring Diagram Schematic Wire Feed Module Option G2562 Classic 300D & 300G Electrical Diagrams Schematic Current Sensor PC BD Kubota Engine only S25973