Lincoln Electric SVM128-A service manual Safety, SA-250

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SAFETY

WARNING

CALIFORNIA PROPOSITION 65 WARNINGS

Diesel engine exhaust and some of its constituents

 

The engine exhaust from this product contains

are known to the State of California to cause can-

 

chemicals known to the State of California to cause

cer, birth defects, and other reproductive harm.

 

cancer, birth defects, or other reproductive harm.

 

 

 

The Above For Diesel Engines

 

The Above For Gasoline Engines

ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you purchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box 351040, Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

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FOR ENGINE powered equipment.

1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running.

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1.b.Operate engines in open, well-ventilated areas or vent the engine exhaust fumes

outdoors.

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1.c. Do not add the fuel near an open flame weld- ing arc or when the engine is running. Stop the engine and allow it to cool before refuel- ing to prevent spilled fuel from vaporizing on contact with hot engine parts and igniting. Do not spill fuel when filling tank. If fuel is spilled, wipe it up and do not start engine until fumes

have been eliminated.

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1.d. Keep all equipment safety guards, covers and devices in position and in good repair.Keep hands, hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting, operating or repairing equipment.

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1.e. In some cases it may be necessary to remove safety guards to perform required maintenance. Remove guards only when necessary and replace them when the maintenance requiring their removal is complete. Always use the greatest care when working near moving parts.

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1.f. Do not put your hands near the engine fan. Do not attempt to override the governor or idler by pushing on the throttle con- trol rods while the engine is running.

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1.g. To prevent accidentally starting gasoline engines while turning the engine or welding generator during maintenance work, disconnect the spark plug wires, distributor cap or magneto wire as appropriate.

1.h. To avoid scalding, do not remove the radiator pressure cap when the engine is hot.

ELECTRIC AND MAGNETIC FIELDS may be dangerous

2.a. Electric current flowing through any conductor causes localized Electric and Magnetic Fields (EMF). Welding current creates EMF fields around welding cables and welding machines

2.b. EMF fields may interfere with some pacemakers, and welders having a pacemaker should consult their physician before welding.

2.c. Exposure to EMF fields in welding may have other health effects which are now not known.

2.d. All welders should use the following procedures in order to minimize exposure to EMF fields from the welding circuit:

2.d.1. Route the electrode and work cables together - Secure them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and work cables. If the electrode cable is on your right side, the work cable should also be on your right side.

2.d.4. Connect the work cable to the workpiece as close as possible to the area being welded.

2.d.5. Do not work next to welding power source.

Mar ‘95

SA-250

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Contents SHIELD-ARCTMSA-250 Safety SA-250Electric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications SA-250Storing Safety PrecautionsLocation and Ventilation PRE-OPERATION Engine Service Exhaust Spark Arrester Cooling SystemMuffler TrailerElectrical Output Connections Welding Cable ConnectionsCircuit Breakers Auxiliary Power RECEPTACLES, PLUGS, and HAND-HELD EquipmentMachine Grounding SA-250 Table of Contents Operation Section Operating Instructions Safety InstructionsOperation General DescriptionRecommended Applications Operational Features and ControlsDesign Features WelderWelding Capability LimitationsControls and Settings WELDER/GENERATOR ControlsControl of Welding Current Current Range SelectorDiesel Engine Controls Figure B.3 Diesel Engine ControlsStarting the Engine Engine OperationBefore Starting the Engine Check and fill the engine fuel tankBREAK-IN Period Stopping the EngineCold Weather Starting Welding Operation After you finish weldingTable B.1 Range Settings for Wire SIZE/SPEED Auxiliary Power 12B-12Table of Contents Accessories OPTIONS/ACCESSORIES TIG Welding Accessories Semiautomatic Welding AccessoriesConnection of Lincoln Electric Wire Feeders Connection of the LN-7 toPIN Amphenol Connection of the LN-25 to Unused Lead IndividuallyFigure C.4 SA-250/LN-25 Across the ARC Connection Diagram Control K487-25 Table of Contents Maintenance Routine and Periodic Maintenance Engine MaintenanceFigure D.1 OIL Drain and Refill Eliminate Air from the Fuel System HOW to Eliminate AIR from the Fuel System Self-vent method Figure D.4 Eliminating AIR from the Fuel SystemFigure D.5 Engine Coolant Drain Plug Figure D.6 Tightening the FAN Belt First 25-50 Hours Daily or BeforeStarting Engine EveryBattery Maintenance Cleaning the BatteryWELDER/GENERATOR Maintenance Idler Maintenance Figure D.5 Major Component Locations SA-250 Table of Contents Theory of Operation Section Circuits Theory of OperationALTERNATOR, and Protection Excitation Flashing Auxiliary and Field Feedback CoilsEngine Idler Circuit Interpole and Series Coils Fine Current AdjustmentCurrent Range Selector DC Generator Machines Mechanical CouplingSA-250 Table of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures PC Board can be damaged by static electricityDetailed in the beginning of this manual Troubleshooting GuideObserve Safety Guidelines Shunt Field Winding Test Field Shunt Winding Test Output Problems Function Problems Function Problems Troubleshooting & Repair Problems Possible Areas Symptoms Misadjustments Course of ActionWelding Problems Materials Needed Alternator Rotor TestTest Description Test Procedure Slip Rings BrushesFigure F.2 Measuring Rotor Resistance Figure F.3 Measuring Rotor Resistance to Ground Field Shunt Winding Test Field Shunt Winding Test PIN TAB Idler Solenoid Test Idler Solenoid Test Engine Throttle Adjustment Test Engine Throttle Adjustment Test Strobe Tach MethodFrequency Counter Method Oscilloscope MethodAdjusting Screw Locking NUT Flashing the Fields DescriptionProcedure Do not remove brush holderHigh Idle no Load Fine Current Control Rheostat AT Maximum Scope SettingsNormal Open Circuit Voltage Waveform 115VAC Supply Normal Open Circuit DC Weld Voltage Waveform Machine Loaded Selector Switch AT Maximum Position Typical DC Weld Output Voltage WaveformAlternator Rotor Removal Replacement Replacement Alternator Rotor RemovalLoosen Screws Alternator Cover Slip Rings Brushes Figure F.13 Rotor Removal Replacement Alternator Stator Removal and Replacement Procedure Alternator Stator RemovalField Bridge Rectifier VAC Receptacle Circuit Breaker Genernator Brush HOLDER/COIL Cables Figure F.18 Drill Spot Locations Generator Frame Removal and Replacement Generator Frame Removal See Figure F.19 for steps 4Figure F.20 Wire and Selector Switch Connections Figure F.21 Case Front Removal Rope Sling ENGINE/GENERATOR Mounting Holes Troubleshooting & Repair Generator Armature Removal and Replacement Generator Armature Removal Figure F.23 Blower Paddle RemovalEngine Output AC Auxiliary Power Receptacle OutputRetest After Repair Welder DC OutputSA-250 Electrical Diagrams Section Section G SA-250 Electrical Diagrams Wiring DiagramWire Feed Module Wiring Diagram Idler PC Board M13708 Schematic Idler PC Board M13708 Components SVM Error Reporting Form

SVM128-A specifications

The Lincoln Electric SVM128-A is a cutting-edge welding machine designed to meet the demands of both professional welders and DIY enthusiasts. This versatile welding power source brings together advanced technology and robust design, making it a reliable choice for various welding applications.

One of the standout features of the SVM128-A is its capability to perform multiple welding processes. It supports MIG, TIG, and stick welding, allowing users to tackle a wide range of projects with ease. This multi-functionality makes it ideal for professionals working in different industries, as well as for hobbyists who enjoy diverse welding tasks.

The SVM128-A is equipped with inverter technology, which enhances its performance by providing a more stable arc and improved energy efficiency. This technological advancement contributes to lower operational costs and allows for a more consistent weld quality across different materials and thicknesses. Additionally, the inverter technology enables the machine to be lightweight and portable, making it convenient for jobs that require mobility.

Another prominent characteristic of the SVM128-A is its user-friendly interface. The machine features intuitive controls and a digital display that allows operators to easily set the desired welding parameters. This simplified setup helps reduce the learning curve for new users while also offering precise control for experienced professionals.

The Lincoln Electric SVM128-A is designed with durability in mind. Its robust construction ensures that it can withstand the rigors of frequent use in demanding environments. The machine is also equipped with various safety features, including thermal overload protection and a duty cycle rating that prevents overheating, ultimately extending its lifespan.

For optimal performance, the SVM128-A provides adjustable output options, allowing users to customize the welding parameters based on their specific needs. This flexibility makes it suitable for welding various metals, including steel, aluminum, and stainless steel.

In summary, the Lincoln Electric SVM128-A combines versatility, advanced technology, and a user-friendly design. With its capability to perform multiple welding processes, lightweight construction, and durable features, it stands out as an excellent option for anyone looking to achieve high-quality welds. Whether for professional or personal use, the SVM128-A is poised to deliver reliable performance and exceptional results.
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