AGCO Challenger MT255B User Manual

© AGCO Corporation, 2006 All rights reserved.
Part Number 79024230 A Rev. (English)
Printed in U.S.A.
November 2006
Challenger
®
MT255B
Hydrostatic Compact Tractor
SERVICE MANUAL
79024230 A Rev.
CONTENTS
GENERAL INFORMATION ....................................................................................................................................01
SPLITTING THE TRACTOR...................................................................................................................................02
ENGINE ............................................................................................................................................................... 03A
ENGINE ACCESSORIES .................................................................................................................................... 03B
TRANSMISSION.....................................................................................................................................................04
HYDROSTATIC TRANSMISSION..........................................................................................................................05
FRONT AXLE .........................................................................................................................................................06
REAR AXLE HOUSING .........................................................................................................................................07
STEERING..............................................................................................................................................................08
HYDRAULICS ........................................................................................................................................................09
ELECTRICAL ACCESSORIES ..............................................................................................................................10

AGCO Challenger MT255B Specifications

General

Brand	AGCO
Model	Challenger MT255B
Category	Tractor
Language	English

Summary

General Information

Tractor Types and Identification Marks

Identifies model name plates and punched serial numbers on the tractor frame and engine block.

Name Plate Details

Explains model name plates for Massey Ferguson, Challenger, and AGCO, including identification codes.

Technical Specifications

Provides detailed technical specifications including dimensions, weight, engine details, PTO, and hydraulics.

Traveling Speeds

Lists forward and reverse ground speeds for different models and tire types, indicating mph and kph.

General Operation Precautions

Provides safety and procedural guidelines for disassembling and reassembling tractor components before operation.

Common Parts Installation Guidance

Details specific installation guidance for bearings, seals, and O-rings.

Common Parts Installation Details

Covers installation advice for snap rings, spring pins, and cotter pins.

Fastener and Fitting Precautions

Covers safe practices for bolts, nuts, grease fittings, and adhesive application.

Splitting the Tractor

Disassembly of Function Blocks

Outlines general procedures for tractor disassembly, including hood and side cover removal.

Hood and Front Grill Removal

Details the steps for opening, supporting, and removing the tractor hood, grill, and related components.

Seat, Fenders, and Floor Deck Removal

Provides instructions for removing seat, fenders, floor decks, ROPS, and related control levers.

Column and Rear Cover Removal

Details steps for removing column covers, rear covers, and related wiring harness connectors.

Front Cover and Electrical Component Removal

Covers removal of front cover, meter panel, fuse box, hood stay, and disconnection of electrical cables.

Fuel Tank and Steering Assembly Removal

Details disconnecting fuel lines, steering hoses, and removing the steering post assembly and fuel tank.

Frame Component Removal

Provides steps for removing front and rear frame mounting bolts and the floor frame.

Hydraulic and Brake System Component Removal

Details disconnecting hydraulic hoses, brake rods, and removing brake pedal and PTO lever.

Final Disconnection and Frame Separation

Covers removing the neutral switch, final mounting bolts, and lifting the frame for separation.

Radiator Removal

Provides steps for draining coolant, disconnecting hoses, and removing the radiator assembly.

Engine and Front Transmission Separation

Details procedures for separating the engine from the front transmission, including shaft cover adjustments.

Draining Oil and Pipe Disconnection

Covers draining transmission oil, removing suction and delivery pipes, and disconnecting power steering hoses.