vi

TABLE OF CONTENTS

 

 

 

 

vi

 

 

 

Page

 

 

Safety

i-iv

 

 

 

 

 

 

 

 

 

 

Installation

Section A

 

 

Technical Specifications - LN-742

A-1

 

 

Mounting Location

A-2

 

 

Input Cable Connections

A-2

 

 

Work Cable

A-5

 

 

Gun and Cable Assemblies

A-5

 

 

Gun Cable Connections

A-5

 

 

Water Connections (For Water Cooled Guns)

A-6

 

 

GMAW Shielding Gas Hookup

A-7

 

 

 

Operation

Section B

 

 

Operating Instructions

B-1

 

 

Safety Precautions

B-1

 

 

General Description

B-1

 

 

Recommended Processes and Equipment

B-1

 

 

Controls and Settings

B-2

 

 

Acceleration Setting

B-3

 

 

English or Metric Speed Display Units

B-3

 

 

Circuit Protection

B-3

 

 

Drive Roll Installation

B-3

 

 

Idle Roll Pressure Setting

B-7

 

 

Wire Loading

B-8

 

 

Making a Weld

B-12

 

 

Wire Reel Changing

B-12

 

 

 

Accessories

Section C

 

 

General

C-1

 

 

Flux System Components

C-2

 

 

Power Input Cables

C-3

 

 

Welding Guns

C-3

 

 

Spindles, Stands, and Adapters

C-4

 

 

Attaching the Wire Reel Stand

C-5

 

 

Drive Roll Kits

C-6

 

 

 

 

 

 

 

 

 

Maintenance

Section D

 

 

Routine Maintenance

D-1

 

 

Periodic Maintenance

D-1

 

 

 

 

 

 

 

 

Troubleshooting and Repair

Section E

 

 

How To Use Troubleshooting Guide

E-1

 

 

Troubleshooting Guide

E-2

 

 

 

 

 

 

 

 

 

Electrical Diagram

Section F

 

 

 

 

 

 

 

Parts Manual

P-228

 

 

 

 

 

 

 

 

LN-742 & LN-742H

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Lincoln LN-742H manual Table of Contents

LN-742, LN-742H specifications

The Lincoln LN-742H and LN-742 are renowned models in the realm of industrial welding equipment, specifically designed to cater to the needs of professional welders and fabricators. These machines stand out for their robustness, advanced technology, and ease of use, making them popular choices in various industries, including construction, automotive, and manufacturing.

One of the main features of the Lincoln LN-742H and LN-742 is their powerful Arc control capabilities. The machines are equipped with innovative technology that allows for consistent arc stability, which is crucial for achieving high-quality welds. The adjustable arc force enables users to tailor the welding parameters to their specific applications, facilitating optimal penetration and minimal spatter.

The LN-742H model is particularly notable for its enhanced portable design, making it easier for operators to transport the machine to different job sites. This portability does not compromise its power, as it offers a high output suitable for both thin and thicker materials. Moreover, the LN-742 model comes with a highly efficient cooling system that ensures the machine runs smoothly without overheating, even during prolonged use.

Both models feature an intuitive user interface that simplifies the welding process. The digital display offers real-time feedback on the welding parameters, allowing welders to make precise adjustments as needed. This feature is especially beneficial for beginners, who may be unfamiliar with optimal welding settings.

Another impressive characteristic of the Lincoln LN-742H and LN-742 machines is their versatility. They support various welding processes, including MIG, TIG, and stick welding, giving users the flexibility to choose the most suitable method for their projects. This adaptability makes these models an ideal solution for shops that handle a wide range of welding tasks.

Durability is a significant consideration in the design of the LN-742H and LN-742, as they are built with high-quality materials that withstand heavy use and challenging conditions. The rugged construction extends the lifespan of the machines, reducing the need for frequent repairs and servicing.

In summary, the Lincoln LN-742H and LN-742 welding machines exemplify advanced engineering and user-focused design. Their combination of powerful performance, portability, user-friendly features, and versatile applications makes them essential tools for professionals in the welding industry, paving the way for excellence in metal fabrication and repair.