Adjust Low Idle | Lincoln Electric SVM134-A guide

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F-25

F-25

TROUBLESHOOTING & REPAIR

ENGINE THROTTLE ADJUSTMENT TEST (continued)

FIGURE F.9 – LOW IDLE ADJUSTMENT

SPEED

ADJUSTMENT

SCREW

IDLER

ROD

LOCKING

NUT

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Adjust Low Idle

a.Make sure there is no load on the machine.

b.Set the Idler switch to AUTO and wait for the engine to change to low idle speed.

c.Check the alignment of the idler rod so that the plunger can move freely.

d.Using the 7/16” wrench, loosen the idler rod locking nut. This is located on the idler rod between the carburetor ball joint and the idler solenoid. See Figure F.9.

e.Adjust the idler rod stickout from the ball joint to set the low idle speed to the bottom of the range (1000 RPM). The flattened por- tion of the idler rod must be vertical. This ensures free pivoting of the idler rod in the idler solenoid plunger. To achieve this, turn the idler rod into the ball joint (no more than one-half turn).

f.Tighten the locking nut to the ball joint. The low idle RPM should now be slightly less than the bottom value of the range.

g.Using the speed adjustment screw on the carburetor, set the low RPM to within the range (1000 - 1050 RPM). See Figure F.9.

CLASSIC I

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Lincoln Electric SVM134-A service manual Adjust Low Idle

Contents

Classic I TM California Proposition 65 Warnings Safety Electric Shock can kill Iii Welding Sparks can cause fire or explosion Sûreté Pour Soudage a L’Arc Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Classic Installation Safety Precautions Location and VentilationStoring PRE-OPERATION Engine Service Muffler Cooling SystemExhaust Spark Arrester Trailers Figure A.1 Ground Stud Location Machine Grounding Electrical Output Connections Auxiliary Power Receptacle PLUGS, and HAND-HELD EquipmentWelding Cable Connections Cable size for combined length Classic Table of Contents Operation Section Safety Instructions OperationOperating Instructions Recommended Applications Operational Features and ControlsWelder Generator WELDER/GENERATOR Controls Controls and Settings Figure B.2 Current Controls Control of Welding Current Return Section TOC Gasoline Engine Controls Engine Operation Before Starting the EngineStarting the Engine Stopping the Engine Cold Weather StartingBREAK-IN Period After you finish welding Welding Operation Table B.1 Range Settings for Wire SIZE/SPEED Auxiliary Power Table of Contents Accessories Semiautomatic Welding Accessories OPTIONS/ACCESSORIES Wire Feed Module see Figure C.1 Connection of Lincoln Electric Wire FeedersConnection of the LN-25 to Classic I Across the ARC with Classic Table of Contents Maintenance Engine Maintenance Safety Precautions Routine and Periodic Maintenance Figure D.1 OIL Drain and Refill MAX MIN Figure D.2A Engine Coolant Drain Plug Gap Specifications 0.032 inch .8 mm After cleaning or when installing a new spark plugSet the terminal gap with a feeler gauge or gapping Tool. See Figure D.4 Classic I charging system is Negative Battery Maintenance Return to Section Return to Section TOC WELDER/GENERATOR Maintenance Idler Maintenance Figure D.5 Major Component Locations Classic Table of Contents Theory of Operation Section BATTERY, STARTER, Engine Alternator and OIL Switch Circuit Theory of OperationGeneral Description ENGINE, Main Generator Armature and Frame and DC Exciter Excitation FlashingMain SHUNT, Interpole and Series Coils Fine Current Adjustment Current Range SelectorEngine Idler Circuit DC Generator Machines Return to Section TOC Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & Repair PC Board can be damaged by static electricity PC Board Troubleshooting Procedures Troubleshooting Guide Observe Safety GuidelinesDetailed in the beginning of this manual Shunt Field Winding Test Main Generator Throttle Adjustment Test Output Problems Function Problems Troubleshooting & Repair Engine Problems Welding Problems DC Exciter Test Test DescriptionMaterials Needed DC Exciter Test Test Procedure Figure F.2 Exciter Cover Removal Shunt Coil and Series Coil Resistance Tests Small Flex Lead Solid Idler Solenoid Test Troubleshooting & Repair Main Generator Shunt Field Winding Test Main Generator Shunt Field Winding Test Figure F.6 Plug P10 PIN Assignments TAB Engine Throttle Adjustment Test Strobe Tach Method Engine Throttle Adjustment Test Adjust High Idle Engine Throttle Adjustment Test Adjust Low Idle Description Flashing the Fields Flashing the Fields Procedure Figure F.11 Brush HOLDER/BATTERY Jumper Connections Scope Settings Normal Open Circuit Voltage Waveform 115VDC SupplyHigh Idle no Load Fine Current Control Rheostat AT Maximum Normal Open Circuit DC Weld Voltage Waveform Typical DC Weld Voltage Waveform Machine Loaded Selector Switch AT Maximum DC Exciter Armature and Field Coils Removal and Replacement DC Exciter Armature Removal Procedure ReassemblyDC Exciter Armature and Field Coils Perform the DC Exciter Armature Removal Procedure Field Coils Removal Procedure Main Generator Frame Removal and Replacement Replacement Bolt / NUT Main Generator Frame Removal Perform the DC Exciter Armature Removal Lead Figure F.16 Selector Switch Lead Removal Terminal Figure F.18 Choke Control Cable Removal Loosen Here Main Generator Frame Removal Figure F.20 Front Panel Fastener Removal Troubleshooting & Repair Remove Mounting NUTS, Washers Bolts Feet Perform the DC Exciter Armature Reassembly Procedure Main Generator Armature Removal and Replacement Armature is now free to be removed from the engine Main Generator Armature Removal Retest After Repair DC Auxiliary Power Receptacle OutputEngine Output Welder DC Output Electrical Diagrams Section Wiring Diagram Classic Electrical Diagrams Wiring Diagram Wire Feed Module Wire Feed Module Wiring Diagram 16990 M Schematic Idler PC Board Idler PC Board Assembly Idler PC Board