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Challenger® MT400B Series tractors offer a variety of configurations to fit almost any farming or ranching operation — including 2-wheel or 4-wheel drive; open platform or cab and a choice of open- or closed-center hydraulics.
These tough tractors deliver all the strength, power and reliability one would expect from a Challenger tractor. Whether they’re at work around the farm, moving materials on the construction site or mowing the median on a state highway, Challenger MT400B Series tractors give more at every turn.
More torque, more control, more serviceability features and more fuel left at the end of the day are just a few trademarks of the MT400B Series.
| Model | PTO hp (kW) | Engine | ||
| MT445B | 75 (56) | Cat® C4.4 ACERT | ||
| MT455B | 85 (63) | Cat® C4.4 ACERT | ||
| MT465B | 95 (71) | Cat® C4.4 ACERT | ||
| MT475B | 100 (75) | Cat® C6.6 ACERT | ||
| Click on model number to view complete specs in AGCO Compare | ||||
Legendary Cat® diesel engines power all of the MT400B Series tractors. Whether it’s the Cat C4.4 ACERT® or the Cat C6.6 ACERT® (MT475B only), these engines provide outstanding power and reliability, not to mention the latest tier III technology for lower emissions, increased fuel efficiency and decreased noise levels.
![]() Cat C6.6 ACERT® |
![]() Cat C4.4 ACERT® |
Additional Features:

The AutoPower IV is the kind of versatile, reliable transmission operators have been looking for to meet today’s demanding applications. With a combination of four ranges and four powershifts, it is easily the simplest 16 X 16 semi-powershift transmission in its market.
Single-Lever ControlSimply pulse the special T-handle forward or back to make sequential shifts through the four ranges and powershifts – all without clutching.
Fingertip Power ControlThe three-function shuttle lever, located on the left side of the steering column, provides convenient fingertip control of forward/reverse shuttling, powershift changes and declutching.
Shuttle IntensityA rotary dial on the right-hand console lets the operator adjust the intensity of shuttle engagement to match application needs and preferences.
Creeper and supercreeper provide gear reduction ratios of 4:1 and 14:1 for speeds down to .4 mph (0.6 km/h) using creeper and .11 mph (0.2 km/h) with supercreeper.

Hydraulic muscle comes standard with the MT400B Series. Plus, there are plenty of options and flexibility features for virtually any application.

Cab or flat-deck platform, the MT400B Series provides plenty of comfort, control, roominess and visibility – all designed to improve operator efficiency and productivity.

All MT400B Series tractors come with a fully adjustable spring suspension seat as standard equipment. All cab models feature an optional air-ride swivel seat with armrests as well as an instructor seat.
All major tractor and implement controls are conveniently located on the right-hand control console for maximum productivity and minimal fatigue.
The new Mechanical Cab Suspension system option utilizes silent block bushes at the front of the cab and a pair of spring assisted shock absorbers mounted at the rear. Damping is also provided in three dimensions with a panhard rod for lateral stability.
All models feature a narrow, sloping hood and either an A-post mounted exhaust or an optional down-swept exhaust (4-cylinder models only).

The Electronic Linkage Control (ELC) system features electronic draft sensing and lift capacities up to 9,189 lbs (4,168 kg).
Hitch-mounted implements are precisely controlled with the MT400B Series’ ELC system. These category II hitches are ideal for implements such as planters, cultivators, rear blades and mowers.
All MT400B models also feature an independent dual speed (540/1,000 rpm) PTO and an optional economy PTO. Speeds are clearly displayed on the easy-to-read digital display on the instrument panel.
The economy PTO is perfect for equipment that does not require maximum horsepower. This option reduces engine speed by 23 percent while still maintaining full PTO shaft speed. The slower engine speeds reduce fuel consumption, noise, vibration and wear.
The MT475B is also available with an integrated front 3-point hitch and PTO system. 21 spline, 1,000 rpm front PTO and two hydraulic remotes are also optional for added versatility.

The MT400B series was engineered with serviceability in mind.
Several features contribute to easy service including:

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