Lincoln Electric SVM157-A service manual FAN BLADE/MOTOR Replacement

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F-48	TROUBLESHOOTING AND REPAIR	F-48

FAN BLADE/MOTOR REPLACEMENT (Continued)

PROCEDURE

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1.Using a 3/8” nutdriver, remove the lower right side of the case wraparound cover.

2.Perform the Output Capacitor Bank

Removal Procedure.

3.Using a 5/16” nutdriver, remove the four fan mounting screws from the rear of the machine. See Figure F.22.

4.Using an open end 11/32” wrench, remove the two fan motor mounting nuts and lock- washers. See Figure F.22.

5.Using a flathead screwdriver, loosen the fan blade mounting band. See Figure F.22.

6.Pry the fan blade off of the mounting shaft. NOTE: If fan blade cracks or breaks

upon removal, replace it.

7.Carefully manuver the fan motor and fan blade out of the right side of the machine.

8.Replace the fan motor and fan blade if nec- essary.

9.Tighten the fan blade mounting band.

10.Carefully manuver the fan assembly into its original position.

11.Replace the two 11/32” fan motor mounting nuts and lockwashers.

12.Replace the four 5/16” fan assembly mount- ing screws in the rear of the machine.

NOTE: Make sure the fan blade is free to rotate when all of the mounting bolts are replaced.

13.Perform the Output Capacitor Bank

Replacement Procedure.

14.Replace the lower right case cover.

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FIGURE F.22. - FAN MOUNTING BOLTS

REAR

Fan

Blade

Fan

Motor

}
}	Fan
}
	Mounting
	Band
	11/32"
	Mounting
	Nuts

5/16" Bolts

POWER MIG 200

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Contents Power MIG Safety Depends on YouSafety California Proposition 65 WarningsElectric Shock can kill ARC Rays can burnCylinder may explode if damaged IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation SectionInstallation Technical Specifications Power MIG3INSTALLATIONA-3 Figure A.1 Dual Voltage Machine Input Connections Output Polarity Connections Figure A.2 Triple Voltage Machine Input ConnectionsShielding GAS GUN and Cable InstallationCylinder may explode if damaged Operation Section Operation Section BOperation Wear eye, ear and body protec- tionProduct Description Wire Drive RollWire Size Conversion Parts Recommended Processes and EquipmentWire Reel Loading READI-REELS, Spools or Coils Procedure for Changing Drive and Idle Roll SetsTo Start the Welder Feeding Wire Electrode Making a Weld Idle Roll Pressure SettingFAN Control Avoiding Wire Feeding ProblemsWire Feed Overload Protection Input Line Voltage VariationsAccessories Section K363P READI-REEL Adapter AccessoriesDrive Roll Kits Dual Cylinder Mounting KIT K1702-1Installed Adapter KIT and Spool GUNPower MIG Maintenance Section Maintenance This screw should only be gently tightened Cause poor wire feedingLiner Removal and REPLACE- Ment Overtightening will split or collapse the linerGUN Handle Disassembly English Metric Description SizeMaintenance Power MIG Line Switch Theory of Operation SectionTheory of Operation Output Rectification Contactor and Control Board Motor Control BoardControl BOARD, GUN Trigger and Wire Drive Motor Figure E.4 Optional CircuitsWirefeed Overload Protection Thermal and Overload ProtectionPower MIG Troubleshooting and Repair Section Troubleshooting and Repair Section FTroubleshooting and Repair How To Use Troubleshooting GuidePC Board Troubleshooting Procedures Perform the Main Transformer Perform the Output Contactor Avoid contact with any portion These capacitors is toxicYour body Function Problems Tachometer Feedback Test Welding Problems Weld bead is narrow or ropy Make sure the welding proce Test Description Main Transformer TestMaterials Needed ON/OFF Power Switch will be hot during these tests Main Transformer TestX10 Table F.1. Test Points Input Voltage Test PointsWire Drive Motor and Tachometer Feedback Test Test Procedure Figure F.4. Plug J4Disconnect the main AC input power to the machine Test for Supply Voltage to TachometerTest for Feedback Voltage to Control Board VDCOutput Bridge Rectifier Test Test Procedure Output Bridge Rectifier TestContactor Test Contactor Test Figure F.7. Contactor Terminals and LeadsVolts 10.0 Typical Output Voltage Waveform Machine Loaded MAX TAP GVolts 20.0 Normal Open Circuit Voltage Waveform MAX TAP GMachine Loaded to 180 Amps AT 16 VDC Scope Settings Volts 20.0 Control Board Replacement DescriptionControl Board Replacement ProcedureWire Drive Motor Assembly Replacement Wire Drive Motor Assembly Replacement Wire DriveBolt Gas Hose TOC Output Diode Bridge Rectifier Replacement Output Diode Bridge Rectifier Mounting Bracket Mounting Bolts Rectifier Power MIG Output Capacitors Replacement Output Capacitors Replacement Figure F.14. Capacitor Bank LocationLead Mounting Bolts Nuts & Lock washers Places Power MIG 41TROUBLESHOOTING and REPAIRF-41 Main Transformer ReplacementMain Transformer Replacement See Figure F.17Replacement Figure F.17. Leads X9, X10, 104B,104C, & H1BX2 X3 X4 X5 X6 X7 Lead Power MIG FAN BLADE/MOTOR Replacement FAN BLADE/MOTOR Replacement Perform the Output Capacitor Bank Removal ProcedureOutput Contactor Replacement Output Contactor Replacement Figure F.24Mounting Bolts Retest After Repair Electrical Diagrams Table of Contents Electrical Diagrams SectionPower MIG 200 208/230V Wiring DiagramSchematic Control PC Board PC Board ASSEMBLY-CONTROL G3851-1SVM Error Reporting Form