Table of Contents
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Challenger
®
MT735 / MT745 / MT755 / MT765
MT745B / MT755B / MT765B
Track Tractor
SERVICE MANUAL
79023971 C Rev.
CONTENTS
INTRODUCTION...............................................................................................................................................................01A
ENGINE .............................................................................................................................................................................02A
ENGINE AUXILIARY.........................................................................................................................................................02B
POWERTRAIN SYSTEM OPERATION...........................................................................................................................03A
POWERTRAIN DISASSEMBLY AND ASSEMBLY.........................................................................................................03B
STEERING AND BRAKE SYSTEM .................................................................................................................................04A
UNDERCARRIAGE...........................................................................................................................................................05A
HYDRAULIC AND THREE POINT HITCH TESTING AND ADJUSTING.......................................................................06A
HYDRAULIC SCHEMATICS ............................................................................................................................................06B
ELECTRICAL SCHEMATICS...........................................................................................................................................07A
TRACTOR MANAGEMENT SYSTEM CENTER (TMC) .................................................................................................08A
AUTO-GUIDE SYSTEMS OPERATION ..........................................................................................................................08B
CAB HEATING AND AIR CONDITIONING .....................................................................................................................09A
COMPONENT SPECIFICATIONS...................................................................................................................................10A
COMPONENT DISASSEMBLY AND ASSEMBLY..........................................................................................................10B
TROUBLESHOOTING ......................................................................................................................................................11A
© AGCO Corporation, All rights reserved.
Part Number 79023971 C Rev. (English)
Printed in U.S.A.
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Summarization of Contents
Introduction to Challenger Tractors
Service Manual Scope
Defines the scope of the service manual for Challenger MT735/MT745/MT755/MT765 series.
Manual Structure and Page Numbering
Explains the manual's structure into divisions with part numbers and revision levels.
Units of Measurement Used
Details metric and US units used in the manual for measurements and hardware.
Ordering Replacement Parts
Lists required information for ordering replacement parts efficiently.
Important Safety Information
Crucial safety precautions for operation, maintenance, and repair to prevent injury or death.
Safety Alert Symbol Explained
Explains the meaning and use of the safety alert symbol for hazard awareness.
Signal Words for Hazards
Defines DANGER, WARNING, and CAUTION signal words for hazard severity.
Informational Messages Explained
Explains the use of IMPORTANT and NOTE for additional information and tips.
General Hazard Information
Covers general hazards like tractor movement, foreign material, and cleaning solutions.
Pressurized Air Safety Precautions
Safety precautions when using pressurized air for cleaning to prevent injury.
Asbestos Information
States AGCO parts are asbestos-free and recommends genuine AGCO parts.
Electrical Storm Injury Prevention
Guidelines for safety during electrical storms when operating or near the machine.
Safe Mounting and Dismounting Procedures
Safe procedures for mounting and dismounting the tractor using steps and handholds.
Before Starting Engine Procedures
Pre-start checks and procedures to ensure safe engine ignition.
Engine Starting Procedures
Procedures for starting the engine, including transmission lever position and ventilation.
Before Operation Checks
Pre-operation checks for clearing area, securing doors, mirrors, and fastening seat belt.
Safe Operation Practices
Safe operating practices, control usage, and awareness of surroundings.
Tractor Parking Procedures
Procedures for safely parking the tractor on level surfaces or grades.
Operator Station Guidelines
Guidelines for modifications and securing items within the operator station.
Crushing and Cutting Prevention
Safety measures to prevent crushing or cutting injuries from equipment and moving parts.
Rollover Protective Structure (ROPS) Information
Instructions against modifying the ROPS and its importance for protection.
Machine Identification Information
Information on product identification numbers (PIN) and serial numbers for components.
Torque Specifications Overview
General warnings and guidelines for applying correct torque to fasteners.
Constant Torque Hose Clamps
Explains the purpose and installation of constant torque hose clamps to prevent leaks.
Fasteners Information
Provides torque specifications for metric fasteners.
Metric Fasteners Torque Values
Detailed torque values for various metric thread sizes under different conditions.
Inch Fasteners Torque Values
Provides torque specifications for inch fasteners.
Tightening Straight Thread Fittings
Guidelines and torque values for proper tightening of straight thread hydraulic fittings.
Metric Conversion Information
Conversion factors and tables for metric and imperial units.
Safety Guidelines for Operation and Maintenance
General Safety Information
Provides an overview of safety information within the manual.
Important Safety Information
Crucial safety precautions for operation, maintenance, and repair to prevent injury or death.
Safety Alert Symbol
Explains the meaning and use of the safety alert symbol for hazard awareness.
Signal Words
Defines DANGER, WARNING, and CAUTION signal words for hazard severity.
Informational Messages
Explains the use of IMPORTANT and NOTE for additional information and tips.
General Hazard Information
Covers general hazards like tractor movement, control operation, and safe practices.
Mounting and Dismounting
Safe procedures for mounting and dismounting the tractor using steps and handholds.
Operator Station Safety
Guidelines for modifications and securing items within the operator station.
Crushing and Cutting Prevention
Safety measures to prevent crushing or cutting injuries from equipment and moving parts.
Rollover Protective Structure (ROPS)
Instructions against modifying the ROPS and its importance for protection.
Refueling and Welding Safety
Safety precautions for refueling, welding, and handling fluids.
Moving Parts Safety
Warnings about keeping clear of moving fan blades and other hazardous moving parts.
Engine and System Pressure Safety
Precautions when working with hot engines and systems under pressure.
Hydraulic Lines and Battery Safety
Guidelines for inspecting hydraulic lines and safe battery handling.
Lighting and Auto-Guide System Safety
Safety checks for lights, SMV, and operator attention for Auto-Guide system.
Disassembly and Assembly Procedures
Engine Service and Repair
Refers to engine manufacturer publications for detailed engine service and repair.
Alternator - Remove and Install
Procedures for removing and installing the alternator on the tractor.
Electric Starting Motor - Remove and Install
Steps for removing and installing the electric starting motor.
Fuel Filter and Fuel Filter Base - Remove
Procedure for removing primary and secondary fuel filters and their bases.
Fuel Filter and Fuel Filter Base - Install
Procedure for installing primary and secondary fuel filters and their bases.
Cooling Assembly - Remove
Steps and required tools for removing the cooling assembly.
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