Challenger MT855E

Last Updated: July 2024

Overview

The Challenger MT855E is a powerful tracked tractor equipped with a 12-cylinder, turbocharged, liquid-cooled diesel engine by AGCO Power. The engine has a displacement of 1026 cubic inches and delivers a rated power of 490 horsepower (365.4 kW) with a maximum power of 529 horsepower (394.5 kW). At the rated engine speed (PTO speed) of 2100 rpm, the engine outputs 409.08 horsepower (305.05 kW). The MT855E features a selective gear fixed ratio transmission with full range operator-controlled power shift, offering 16 forward and 4 reverse gears. The tractor has a track width ranging from 100.0" (2540 mm) to 120.0" (3048 mm) and an unladen operating weight of 43,840 lbs (19,872 kg). Additional notable features include a maximum torque of 1564 lb-ft (2121 Nm) at 1251 rpm, a torque rise of 52.9%, and detailed hydraulic performance specifications.

Key Specifications

Power Output: 490 (365.4 kW), Max Power 529 HP (394.5 kW); Rated Engine Speed (PTO speed): 409.08 HP (305.05 kW) at 2100 rpm

Transmission: selective gear fixed ratio with full range operator-controlled power shift

Operating Weight: 43840

Fuel Type: diesel

Lift Capacity: Max capacity 55913 lbs

Technical Specifications

Engine

Manufacturer: AGCO
Model: AGCO Power
Cooling Type: liquid-cooled
Cylinder Orientation: -
Valve Configuration: 48-valve
Fuel Type: diesel
Induction Type: turbocharged
Cylinders: 12
Displacement (ci): 1026
Bore (in): 4.37
Stroke (in): 5.709
Rated RPM: -
Power Output (hp): 490 (365.4 kW), Max Power 529 HP (394.5 kW); Rated Engine Speed (PTO speed): 409.08 HP (305.05 kW) at 2100 rpm

Transmission

Type: selective gear fixed ratio with full range operator-controlled power shift
Forward Gears: 16
Reverse Gears: 4
Total Gears: -

Dimensions

Length (in): -
Width (in): Track width: 100.0" (2540 mm) to 120.0" (3048 mm)
Height (in): -
Operating Weight (lb): 43840

Power Take-Off (PTO)

PTO Type: -
PTO Speed 1 (rpm): -
PTO Speed 2 (rpm): -
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: -
Drive Type: -
Steering Type: power differential
Coolant Capacity (qts): -
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: -
Manufacture - End Year: -
Hitch Type: -
Hitch Category: Cat. 4
Hitch Position: -
Hitch Capacity (lb): Max capacity 55913 lbs
Operator Station Type: -
Starter Type: electric
Brake Type: -
Hydraulic System Type: closed center pressure flow compensated

Test Results

Nebraska Tractor Test Laboratory - Test Date: October 28 to November 7, 2016

Maximum Power and Fuel Consumption

Maximum Power: 453.59 HP (338.24 kW) at 1599 rpm
Fuel Consumption at Maximum Power: 23.96 Gal/hr (90.71 l/h) with a fuel efficiency of 0.370 lb/hp.hr (0.225 kg/kW.h)
DEF Consumption: 0.67 Gal/hr (2.52 l/h)

Drawbar Performance

Power at Rated Engine Speed (6th Gear): 360.27 HP (268.65 kW) with a drawbar pull of 30305 lbs (134.80 kN) and a speed of 4.46 mph (7.18 km/h)
Fuel Consumption at Rated Speed: 0.496 lb/hp.hr (0.302 kg/kW.h) with a fuel efficiency of 14.11 Hp.hr/gal (2.78 kW.h/l)

Torque and Engine Performance

Maximum Torque: 1564 lb.-ft. (2121 Nm) at 1251 rpm
Torque Rise: 52.9% with a power increase at 1599 rpm of 10.9%

Hydraulic Performance

Maximum Force Exerted: 20936 lbs (93.1 kN) at hitch points
Pump Delivery Rate: 86.6 GPM (327.7 l/min) at minimum pressure and rated engine speed
Hydraulic Power: 133.8 HP (99.8 kW) at delivery pressure of 2769 psi (191 bar)

Overall Efficiency

Fuel Efficiency at Standard PTO Speed (1000 rpm): 17.18 Hp.hr/gal (3.38 kW.h/l)
Fuel Consumption: 25.87 Gal/hr (97.94 l/h) at 1979 rpm

NTTL.(2016).Test 2167: Challenger MT855E Diesel. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2593