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F-1TABLE OF CONTENTS - TROUBLESHOOTING AND REPAIR F-1

Troubleshooting and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-1

How to Use Troubleshooting Guide

. .F-2

PC Board Troubleshooting Procedures

. .F-3

Troubleshooting Guide

. .F-4

Test Procedures

 

Engine RPM Adjustment Test

.F-21

Brush And Slip Ring Service Procedure (Exciter / Auxiliary Power Alternator)

.F-25

Exciter Rotor Voltage

.F-29

Exciter Rotor Resistance And Ground Test (Exciter / Auxiliary Power Alternator

F-33

Flashing Voltage Test (Engine Not Running)

.F-37

Exciter Stator Short Circuit & Ground Test

.F-41

Welding Generator Brush And Commutator Inspection And Service

.F-43

Weld Circuit Ground And Short Circuit Test

.F-47

Shunt Field Coil Resistance And Ground Test

.F-49

Shunt Field Circuit Voltage Test

.F-51

Dead Short, 1st Step, And Open Reactor Test

.F-53

Rocker Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-55 Output Control Unit (Variable Reactor) Inspection And Service Procedure . . . . . . . . . . . . . . . . . . . .F-59 Engine Protection System Circuit Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-65 Engine Alternator Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-69

Engine Fuel System Voltage Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-73Removal and Replacement Procedures

Alternator Rotor Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-77 Alternator Stator Removal And Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-81

Generator Frame Removal And Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-85

Generator Armature Removal And Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-87

Retest And Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-89

SAE-400 SEVERE DUTY

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Lincoln Electric SVM187-A service manual 1TABLE of Contents Troubleshooting and Repair F-1

SVM187-A specifications

The Lincoln Electric SVM187-A is a cutting-edge welding machine designed for professional welders and industrial applications. Known for its reliability and performance, it stands out in the competitive welding equipment market. This versatile machine is structured to handle various welding processes, making it a popular choice among users.

One of the primary features of the SVM187-A is its multifunctional capabilities. It supports MIG, TIG, and Stick welding, allowing users to switch between different welding techniques seamlessly. This flexibility makes it suitable for diverse applications, whether working on automotive repairs, metal fabrication, or construction projects. Additionally, the machine is equipped with a robust power output, ranging from low to high amperage settings, enabling users to tackle a wide array of materials, including mild steel, stainless steel, and aluminum.

The SVM187-A incorporates advanced inverter technology, which ensures increased efficiency and reduced energy consumption. This technology leads to a more compact design, making the unit portable and easy to transport. The lightweight construction of the machine does not compromise its durability; it is built with high-quality materials to withstand the rigors of a professional workshop.

Another notable characteristic of the SVM187-A is its user-friendly interface. The intuitive control panel includes digital displays for precise settings adjustments, ensuring accuracy during operation. Beginners and seasoned welders alike can benefit from the clear and straightforward design, reducing training time and enhancing productivity.

Safety features are paramount in the SVM187-A's design. The machine is equipped with thermal overload protection, ensuring that it operates within a safe temperature range to prevent damage and promote longevity. Additionally, it features automatic voltage regulation, which maintains a stable arc even under varying input voltage conditions.

In summary, the Lincoln Electric SVM187-A is a versatile, efficient, and user-friendly welding machine suited for both professional and industrial applications. Its multifunctionality, inverter technology, and robust safety features set it apart from competitors, making it a reliable choice for welders seeking to elevate their craftsmanship while ensuring safety and efficiency. This machine represents the innovation and quality that Lincoln Electric is renowned for in the welding industry.