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Lincoln LT-7 - User Manual

Lincoln LT-7
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LT-7 TRACTOR TROUBLESHOOTING
TROUBLE SHOOTING GUIDE
Sales and Service through Subsidiaries and Distributors Worldwide
22801 St. Clair Ave. Cleveland, Ohio 44117-1199 U.S.A. Tel. (216) 481-8100
World's Leader in Welding and Cutting Products Premier Manufacturer of Industrial Motors
IM279-TS
JUNE 1995
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However, your
overall safety can be increased by
proper installation ... and thought-
ful operation on your part. DO
NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS MAN-
UAL AND THE SAFETY PRE-
CAUTIONS CONTAINED
THROUGHOUT. And, most
importantly, think before you act
and be careful.
Question and Answer IconNeed help?

Do you have a question about the Lincoln LT-7 and is the answer not in the manual?

Summary

LT-7 Tractor Troubleshooting Guide

Safety Overview

Emphasizes the importance of safety precautions and reading the manual for safe operation.

Troubleshooting Guide Introduction

Introduces the troubleshooting guide section.

General Safety Information

California Proposition 65 Warnings

Discloses potential health risks associated with diesel/gasoline engine exhaust.

Engine Operation Safety

Safety precautions for operating engine-powered equipment.

Electric and Magnetic Field Hazards

Discusses potential dangers of EMF fields and how to minimize exposure.

Specific Safety Hazards

Electrical Shock Hazards

Details the dangers of electric shock and necessary precautions during operation and maintenance.

Arc Ray Hazards

Explains the risks of arc rays and protective measures for eyes and skin.

Fumes and Gases Hazards

Highlights the dangers of welding fumes and gases and ventilation requirements.

Additional Safety Precautions

Welding Spark and Fire Hazards

Addresses the risks of welding sparks causing fires or explosions and preventative measures.

Compressed Gas Cylinder Safety

Provides safety guidelines for handling and storing compressed gas cylinders.

Electrical Equipment Safety

Outlines safety requirements for electrically powered equipment installation and grounding.

Theory of Operation

General Description of LT-7 Tractor

Provides a general overview of the LT-7 tractor's capabilities and specifications.

Input Power Circuits

Explains how the LT-7 tractor receives and utilizes 115VAC input power.

Theory of Operation - Boards

Control, Logic, and Travel Boards

Details the functions and interactions of the control, logic, and travel boards.

Theory of Operation - Voltage Board

Variable Voltage Board Function

Describes the role of the variable voltage board in arc length control and sensing.

Theory of Operation Notes

Troubleshooting and Repair

How to Use the Troubleshooting Guide

Provides a three-step procedure for using the troubleshooting guide effectively.

Troubleshooting and Repair - PC Boards

PC Board Troubleshooting Procedures

Details procedures for troubleshooting and replacing PC boards, including static precautions.

Troubleshooting - Functional Problems

Troubleshooting - Travel Problems

PC Board Status Lights

Wire Drive Motor Test

Travel Motor Test

Motor Test Notes

Wire Drive Motor Removal and Replacement

Diagrams

Connection Schematic M15342

Presents the connection schematic diagram for the LT-7 tractor.

Diagrams - Control Box

Control Box Wiring Diagram L7460

Illustrates the wiring diagram for the LT-7 tractor's control box.

Diagrams Notes

Summary

LT-7 Tractor Troubleshooting Guide

Safety Overview

Emphasizes the importance of safety precautions and reading the manual for safe operation.

Troubleshooting Guide Introduction

Introduces the troubleshooting guide section.

General Safety Information

California Proposition 65 Warnings

Discloses potential health risks associated with diesel/gasoline engine exhaust.

Engine Operation Safety

Safety precautions for operating engine-powered equipment.

Electric and Magnetic Field Hazards

Discusses potential dangers of EMF fields and how to minimize exposure.

Specific Safety Hazards

Electrical Shock Hazards

Details the dangers of electric shock and necessary precautions during operation and maintenance.

Arc Ray Hazards

Explains the risks of arc rays and protective measures for eyes and skin.

Fumes and Gases Hazards

Highlights the dangers of welding fumes and gases and ventilation requirements.

Additional Safety Precautions

Welding Spark and Fire Hazards

Addresses the risks of welding sparks causing fires or explosions and preventative measures.

Compressed Gas Cylinder Safety

Provides safety guidelines for handling and storing compressed gas cylinders.

Electrical Equipment Safety

Outlines safety requirements for electrically powered equipment installation and grounding.

Theory of Operation

General Description of LT-7 Tractor

Provides a general overview of the LT-7 tractor's capabilities and specifications.

Input Power Circuits

Explains how the LT-7 tractor receives and utilizes 115VAC input power.

Theory of Operation - Boards

Control, Logic, and Travel Boards

Details the functions and interactions of the control, logic, and travel boards.

Theory of Operation - Voltage Board

Variable Voltage Board Function

Describes the role of the variable voltage board in arc length control and sensing.

Theory of Operation Notes

Troubleshooting and Repair

How to Use the Troubleshooting Guide

Provides a three-step procedure for using the troubleshooting guide effectively.

Troubleshooting and Repair - PC Boards

PC Board Troubleshooting Procedures

Details procedures for troubleshooting and replacing PC boards, including static precautions.

Troubleshooting - Functional Problems

Troubleshooting - Travel Problems

PC Board Status Lights

Wire Drive Motor Test

Travel Motor Test

Motor Test Notes

Wire Drive Motor Removal and Replacement

Diagrams

Connection Schematic M15342

Presents the connection schematic diagram for the LT-7 tractor.

Diagrams - Control Box

Control Box Wiring Diagram L7460

Illustrates the wiring diagram for the LT-7 tractor's control box.

Diagrams Notes

Lincoln LT-7 Specifications

General IconGeneral
BrandLincoln
ModelLT-7
CategoryTractor
LanguageEnglish