Challenger MT855B
Power
460 hp
Production
2005-2008
Engine
Turbocharged diesel, 6-cylinder 24-valve
Transmission
Cat Powershift
From the same series:
Introduction
Challenger MT855B Agricultural Crawler Tractor
The Challenger MT855B is a high-horsepower agricultural crawler tractor manufactured by AGCO in Jackson, Minnesota, USA. Produced between 2005 and 2008, this machine belongs to the MT800B series, engineered for heavy-duty field operations requiring significant traction and power.
Engine and Performance
The tractor is powered by a Caterpillar C15, a 15.2-liter, 6-cylinder turbocharged diesel engine. It generates a gross power output of 460 hp (343.0 kW) at a rated speed of 2100 RPM. The engine delivers a peak torque of 1423 lb-ft (1929.6 Nm) at 1300 RPM, providing the necessary force for demanding tillage and heavy pulling tasks. The unit is liquid-cooled, features a 24-valve configuration, and meets Tier III emission standards.
Transmission and Drivetrain
The MT855B utilizes a Cat Powershift transmission, which is a full power shift system offering 16 forward gears and 4 reverse gears. This configuration allows for seamless gear changes under load, essential for maintaining consistent speed and efficiency during field work. Power is delivered to the ground via a crawler track system, featuring 27.5-inch wide tracks that provide high flotation and traction.
Hydraulics and Hitch
The hydraulic system is a closed-center pressure flow compensated (PFC) type. It provides a total flow capacity of 43.5 gpm (164.6 lpm), with an optional capacity of up to 59 gpm, operating at a pressure of 2900 psi (200.0 bar). The rear of the tractor is equipped with 4 to 6 hydraulic valves and a Type III/IVN rear hitch, which offers a lift capacity of 19,500 lbs (8845 kg). An independent rear PTO is standard, operating at 1000 RPM with a 1.75-inch shaft.
Operator Environment and Dimensions
Designed for long operational hours, the tractor includes a standard cab equipped with air conditioning. The machine has a wheelbase of 118 inches (299 cm) and an operating weight of 41,000 lbs (18,597 kg). The braking system consists of hydraulic wet disc brakes, ensuring reliable stopping power for the tractor's substantial mass.
Conclusion
The Challenger MT855B is a specialized high-capacity tractor designed for large-scale agricultural operations. Its combination of high-torque Caterpillar power, a robust power-shift transmission, and a high-capacity hydraulic system makes it suitable for heavy primary tillage and intensive draft applications.
Production Information of Challenger, MT855B
- Agricultural Crawler tractor
- Built in Jackson, Minnesota, USA
| Manufacturer | Challenger (a part of AGCO) |
|---|
Engine Specifications of Challenger, MT855B
- Caterpillar C15
- Liquid-cooled inline
- 6-cylinder 24-valve
- Turbocharged diesel
| Power (gross) | 460 hp [343.0 kW] |
|---|---|
| Rated RPM | 2100 |
| Displacement | 928 ci [15.2 L] |
| Bore/Stroke | 5.402x6.752 inches [137 x 172 mm] |
| Emissions | Tier III |
| Compression | 16.5:1 |
| Air cleaner | Dual paper elements |
| Starter volts | 12 |
| Torque RPM | 1300 |
| Torque | 1423 lb-ft [1929.6 Nm] |
Transmission Information of Challenger, MT855B
Transmission variants 1
| Transmission | Cat Powershift |
|---|---|
| Type | Full power shift |
| Gears | 16 forward and 4 reverse |
Mechanical Specs of Challenger, MT855B
- Hydraulic wet disc brakes
- Cab standard with air-conditioning.
| Drive | Crawler |
|---|
Power Information of Challenger, MT855B
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 (1.75) |
Hydraulics Specifications of Challenger, MT855B
| Type | Closed center PFC |
|---|---|
| Type(optional) | 59 gpm [223.3 lpm] |
| Total flow | 43.5 gpm [164.6 lpm] |
| Pressure | 2900 psi [200.0 bar] |
| Rear valves | 4 to 6 |
Three-Point Hitch of Challenger, MT855B
| Rear Type | III/IVN |
|---|---|
| Rear lift | 19,500 lbs [8845 kg] |
Electrical System of Challenger, MT855B
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Battery CCA | 1000 |
| Charging amps | 185 |
| Batteries | 4 |
Where it sits
With 460 HP, the Challenger MT855B sits between MT845B (400 HP) and MT855C (475 HP) in Challenger's range. Its power puts it in the 99th percentile of 2000s models in our database (2822 machines).
Frequently asked questions
How much horsepower does the Challenger MT855B have?
The Challenger MT855B delivers 460 HP.
What years was the Challenger MT855B produced?
The Challenger MT855B was produced in 2005-2008.
What engine does the Challenger MT855B have?
The Challenger MT855B is powered by a Turbocharged diesel, 6-cylinder 24-valve engine.
What transmission does the Challenger MT855B use?
The Challenger MT855B uses a Cat Powershift transmission.