Challenger MT645D

Last Updated: September 2024

Overview

The Challenger MT645D is a powerful 4WD tractor built for serious farm work. It has a strong Sisu Diesel engine with 6 cylinders and 250.8 horsepower. This engine is turbocharged and cooled by liquid, which helps it run well even in tough conditions. The tractor uses No. 2 Diesel fuel.

One special thing about the MT645D is its CVT transmission. This means it has infinite forward and reverse gears, making it easy to find the right speed for any job. The tractor is big, measuring 215.7 inches long and 141 inches tall. It's also heavy, weighing 25,365 pounds. The MT645D has large tires, with 600/65R34 in front and 710/75R42 in the back. These help it move well in different types of soil.

The tractor has a comfortable cab for the driver and uses hydrostatic power steering. It has a strong hydraulic system and a rear hitch for attaching tools. The PTO can run at 1000 rpm, which is good for powering many farm implements. Safety features include wet disc brakes that can be controlled by foot pedals. Overall, the Challenger MT645D is a versatile and robust tractor suitable for large-scale farming operations.
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Key Specifications

Power Output: 251 hp (187.0 kW)

Transmission: CVT (combination of mechanical and hydrostatic sections)

Drive Type: 4WD

Operating Weight: 25365 lb (11505 kg)

Fuel Type: No. 2 Diesel

Challenger MT645D vs. Similar Tractors

Power Output

The Power Output for the Challenger MT645D is Excellent. It is greater than 93% of similar Utility tractors in our database.

Horsepower distribution of Utility tractors

(across 6.6K+ tractors in our database)

Operating Weight

The Operating Weight for the Challenger MT645D is Excellent. It is greater than 95% of similar Utility tractors in our database.

Operating weight distribution of Utility tractors

(across 6.4K+ tractors in our database)

Engine Displacement

The Engine Displacement for the Challenger MT645D is Excellent. It is greater than 93% of similar Utility tractors in our database.

Engine displacement distribution of Utility tractors

(across 1K+ tractors in our database)

Engine Rated RPM

The Engine Rated RPM for the Challenger MT645D is Poor. It is greater than 9% of similar Utility tractors in our database.

Engine rated RPM distribution of Utility tractors

(across 1K+ tractors in our database)

Technical Specifications

Engine

Manufacturer
Sisu Diesel
Cooling Type
Liquid-cooled
Fuel Type
No. 2 Diesel
Induction Type
Turbocharged air-to-air intercooled
Cylinders
6
Displacement
514 ci (8.4 L)
Bore
4.37 in (111.0 mm)
Stroke
5.71 in (145.0 mm)
Rated RPM
1950
Power Output
251 hp (187.0 kW)

Transmission

Type
CVT (combination of mechanical and hydrostatic sections)
Forward Gears
Infinite
Reverse Gears
Infinite

Drivetrain

Chassis
4x4
Drive Type
4WD
Steering Type
Hydrostatic power
Brake Type
Multiple wet disc hydraulically operated by two foot pedals that can be locked together

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