Manuals / Lincoln Electric / Power Tools / Welder

Lincoln Electric SVM187-A service manual Figure F.9 Slip Ring Locations

Models: SVM187-A

1 142

Download 142 pages 41.75 Kb

Page 75

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-35

TROUBLESHOOTING AND REPAIR

F-35

EXCITER ROTOR RESISTANCE AND GROUND TEST (Exciter / Auxiliary Power Alternator) (continued)

FIGURE F.9 – SLIP RING LOCATIONS

BRUSHES

BRUSH HOLDER ASSEMBLY

OHMMETER LEADS

NEGATIVE	POSITIVE
SLIP RING	SLIP RING

PROCEDURE (continued)

5.Using the ohmmeter, check the rotor winding resis- tance across the slip rings. Normal resistance is approximately 41.5* ohms, at 77°F. (25° C.) See Figure F.9.

6.Measure the resistance to ground. Place one meter probe on either of the slip rings. Place the other probe on any good, unpainted chassis ground. The resistance should be very high, at least 500,000 (500k) ohms.

If the resistance measurements are not as specified the rotor may be faulty and should be replaced.

If these resistance values are normal, continue testing, using the dynamic rotor resistance and ground test.

SAE-400 SEVERE DUTY

Image 75

Lincoln Electric SVM187-A service manual Figure F.9 Slip Ring Locations

Contents

SAE-400 Severe Duty SAE-400 Severe Duty ISAFETYiCan be dangerous SafetyElectric Shock can kill Fumes and GasesPowered equipment For ElectricallyIii Sûreté Pour Soudage a LʼArc Précautions DE SûretéElectromagnetic Compatibility EMC Safety Vii Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications SAE-400 Severe DutyHeight Width Depth Weight Angle of Operation Safety PrecautionsLOCATION/VENTILATION StackingPRE-OPERATION Engine Service Engine Cooling System Engine BREAK-INSpark Arrestor Machine Grounding Welding Output CablesTable A.1 Combined Length of Electrode Work Cables Table of Contents Operation Section General Description Safety InstructionsOperation Operating InstructionsFor Stick Welding Design Features and Advantages Duty CycleFor Auxiliary Power Other FeaturesEngine Controls Welder Controls Remote ControlAuxiliary Power Controls Polarity SwitchStopping the Engine Engine OperationCold Weather Starting Starting InstructionsTypical Fuel Consumption SAE-400 Severe Duty Table of Contents Accessories Section K1690-1 Gfci Receptacle KIT AccessoriesOptional Field Installed Accessories OrderTable of Contents Maintenance Section Engine OIL Change MaintenanceRoutine Maintenance Periodic MaintenanceFuel Filters Bearing MaintenanceFuel PRE-FILTER/WATER Separator Assembly Cooling SystemEngine Maintenance Components Water Separator ElementSecondary Fuel Filter For machines with integral spark arresting muf- flers Ting ProcedureSpark Arrestor For machines with separate spark arresting unitSAE-400 Severe Duty 1TABLE of CONTENTS-THEORY of Operation Section E-1 Engine Starting and PROTEC- Tion Theory of OperationFigure E.2 Engine Starting and Protection Automatic Engine Idle SystemEXCITER/AUXILIARY Alternator Operation FlashingBuilding output EXCITER/AUXILIARY Alternator OperationAC Auxiliary Output Excitation and field control OverviewProducing weld current Welding Generator OPERA- TionSeries coils and reactor Reactor AssemblyWelding Generator Opera TionInterpole coils SAE-400 Severe Duty 1TABLE of Contents Troubleshooting and Repair F-1 Course of Action 2TROUBLESHOOTING and Repair F-2HOW to USE Troubleshooting Guide Locate Problem SymptomPC Board Troubleshooting Procedures Troubleshooting and RepairAdjustment Test Troubleshooting and Repair Problems Symptoms Possible Areas MisadjustmentsRecommended Course of Action Rocker Adjustment Procedure if necessary Possible Areas of MisadjustmentsTroubleshooting and Repair Adjustment Procedure Welding arc is loud and spatters excessively RPM Adjustment Test System Voltage Tests Protection System Test Perform the Engine Alternator Problems Symptoms Troubleshooting and Repair Low idle RPM may be too low. Perform the Engine Idle Troubleshooting and Repair Troubleshooting and Repair SAE-400 Severe Duty Engine RPM Adjustment Test Test DescriptionMaterials Needed Engine RPM Adjustment Test Test ProcedureStrobe-Tach Method Frequency counter method Figure F.2 Engine Components Code 11199Engine RPM Adjustment Procedure High Idle AdjustmentLow idle adjustment Code 10856 only Exciter / Auxiliary Power Alternator Brush and Slip Ring Service ProcedureFigure F.3 Exciter Cover Screw Locations ProcedureCleaning slip rings BrushesSeating brushes SAE-400 Severe Duty Test Description Exciter Rotor Voltage TestFigure F.6 Exciter Cover Screw Locations Exciter Rotor Voltage TestFigure F.7 Exciter Rotor Voltage Test Circuit and Ground Test Exciter Rotor Resistance and Ground Test Exciter / Auxiliary Power AlternatorStatic Tests Figure F.9 Slip Ring Locations Dynamic Tests Figure F.10 Slip Ring LocationsEngine not running Flashing Voltage TestFlashing Voltage Test Figure F.13 IDLER/ENGINE Protection PC Board Codes Figure F.14 IDLER/ENGINE Protection PC Board Codes 11199 If battery voltage is detectedTest Description Exciter Stator Short Circuit & Ground TestExciter Stator Short Circuit & Ground Test Welding Generator Brush and Commutator Inspection Service Figure F.15 Generator Cover Screw Locations ServiceBlackened Commutator Normal appearanceExamine the brushes Welding Generator Brush and Commutator InspectionPitted and Arc Damaged Commutator Uneven Commutator appearanceWeld Circuit Ground and Short Circuit Test If the resistance is lower than 500k Ohms Weld circuit ground testShunt Field Coil Resistance and Ground Test Shunt Field Coil Resistance and Ground Test Shunt Coil Resistance TestShunt Coil Ground Test Shunt Field Circuit Voltage Test Shunt Field Circuit Voltage Test Dead SHORT, 1ST STEP, and Open Reactor Tests Contact Contact Springs Position Insulated Filler Rotor Winding Movable ContactsMin. open Position First StepRocker Adjustment Procedure Factory set point drill marks Figure F.18 Rocker W/MARKSRocker Adjustment Procedure Initial rocker placementCheck for Max output SAE-400 Severe Duty Test Description Output Control Unit Variable Reactor Inspection and Service ProcedureServicing the continuous control unit Figure F.20 Brush & Spring Winding Insulated WedgeSteel Coil Insulator Contacts Chamfered END of Shaft AT this END Figure F.22 Shaft & TubeSAE-400 Severe Duty Test Description Engine Protection System Circuit TestEngine Protection System Circuit Test 66TROUBLESHOOTING and Repair F-66Figure F.24 Engine Alternator Code 11199 &11408 67TROUBLESHOOTING and Repair F-67SAE-400 Severe Duty Engine Alternator Test Troubleshooting and RepairEngine Alternator Test Run/stop switch on#59 #51 SAE-400 Severe Duty Test Description Engine Fuel System Voltage TestsEngine Fuel System Voltage Tests Figure F.28 PC Board Engine Fuel System Voltage TestsFor Codes 11199 Test Description Alternator Rotor Removal and ReplacementRotor Removal Alternator Rotor Removal and ReplacementRotor Replacement SAE-400 Severe Duty Test Description Alternator Stator Removal and ReplacementAlternator Stator Removal and Replacement Figure F.31 Rocker & Mark Locations Alternator Stator Removal and ReplacementReplacing the Exciter Alternator Stator Test Description Generator Frame Removal and ReplacementGenerator Frame Removal and Replacement Remove the generator frameReplacing the Generator Frame Generator Armature Removal and Replacement Generator Armature Removal and Replacement Removing the ArmatureReplacing the armature Retest After Repair Table of Contents Diagram Section Electrical Diagrams Wiring Diagram SAE-400 Perkins M20544 M21283 Wiring Diagram Generator Frame M5570 Electrical Diagrams Schematic Complete Machine Code 11199 G4924 Schematic Complete Machine Code 11408 G5827 Section TOC Schematic IDLER/ENGINE Shutdown PC Board Code 10856 L11006-2 PC Board Assembly IDLER/ENGINE Shutdown PC Board L12400-2 Schematic IDLER/ENGINE Shutdown PC Board G4828-2