Table of Contents
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Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Section A
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Input Power Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Control Logic and Travel Boards . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Variable Voltage Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3
Troubleshooting and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . .Section B
How to Use Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . .B-2
PC Board Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . .B-3
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-4
Wire Drive Motor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-24
Travel Motor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-26
Wire Drive Motor Removal and Replacement . . . . . . . . . . . . . . . .B-30
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Section C
M15342 Connection Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
L7460 Control Box Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . .C-2
TABLE OF CONTENTS
ELECTRIC SHOCK can kill.
• Never work on the inside of the machine without removing the
input power. You can receive a life threatening electrical shock if
you fail to do this. Only qualified technicians should perform
installation, maintenance, and troubleshooting work on the
machine.
LT-7 TRACTOR
WARNING
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Troubleshooting
