Challenger MT975C

Last Updated: July 2024

Overview

The Challenger MT975C is powered by a 584.72 hp Caterpillar C18 ACERT turbocharged and aftercooled diesel engine with a displacement of 1105 cubic inches. It features a 24-valve configuration, liquid cooling, and a compression ratio of 16.3 to 1. The engine has a crankshaft oriented lengthwise, vertical muffler, and cooling medium temperature control via two thermostats. The full powershift transmission offers 16 forward and 4 reverse gears. This four-wheel drive tractor with triples has a chassis serial number AGCC0975PNTUG1036 and an unladen weight of 50,535 lbs. It utilizes hydrostatic steering, wet multiple disc clutch and brakes, and a 1000 rpm power take-off at 2000 engine rpm. The hydraulic system is direct engine driven with detailed performance data available from independent testing.

Key Specifications

Power Output: 584.72

Transmission: Caterpillar Powershift, full power shift

Operating Weight: 50,535

Fuel Type: Diesel

Technical Specifications

Engine

Manufacturer: Caterpillar
Model: C18 ACERT
Cooling Type: Liquid-cooled
Cylinder Orientation: -
Valve Configuration: 24-valve
Fuel Type: Diesel
Induction Type: Turbocharged aftercooled
Cylinders: 6
Displacement (ci): 1105
Bore (in): 5.709
Stroke (in): 7.205
Rated RPM: 2100
Power Output (hp): 584.72

Transmission

Type: Caterpillar Powershift, full power shift
Forward Gears: 16
Reverse Gears: 4
Total Gears: -

Dimensions

Length (in): 298
Width (in): 200
Height (in): 151
Operating Weight (lb): 50,535

Power Take-Off (PTO)

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

Miscellaneous

Chassis: -
Drive Type: -
Steering Type: -
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: -
Hitch Position: -
Hitch Capacity (lb): -
Operator Station Type: Cab
Starter Type: Electric
Brake Type: -
Hydraulic System Type: Direct engine drive

Test Results

Nebraska Tractor Test Laboratory - Test Date: June 6 - 20, 2008

Maximum Power and Fuel Consumption

Maximum Power: 584.72 HP (436.03 kW) at 1750 rpm
Fuel Consumption at Maximum Power: 32.91 Gal/hr (124.60 l/h) with a fuel efficiency of 0.394 lb/hp.hr (0.240 kg/kW.h)
Fuel Efficiency at Standard PTO Speed (1000 rpm): 16.33 Hp.hr/gal (3.22 kW.h/l)

Drawbar Performance

Power at Rated Engine Speed (8th Gear): 466.08 HP (347.56 kW) with a drawbar pull of 32089 lbs (142.74 kN) and a speed of 5.45 mph (8.77 km/h)
Fuel Consumption at Rated Speed: 0.500 lb/hp.hr (0.304 kg/kW.h) with a fuel efficiency of 14.02 Hp.hr/gal (2.76 kW.h/l)

Torque and Engine Performance

Maximum Torque: 2010 lb.-ft. (2725 Nm) at 1297 rpm
Torque Rise: 55.1% with a power increase at 1750 rpm of 12.8%

Hydraulic Performance

Maximum Force Exerted: No 3-point lift available
Pump Delivery Rate: 43.7 GPM (165.4 l/min) at minimum pressure and rated engine speed
Hydraulic Power: 66.4 HP (49.5 kW) at delivery pressure of 2761 psi (190 bar)

Overall Efficiency

Fuel Efficiency at Varying Power (at 2100 rpm): 15.80 Hp.hr/gal (3.11 kW.h/l)
Fuel Consumption: 32.80 Gal/hr (124.17 l/h) at 2100 rpm

Nebraska Tractor Test Lab. (2009). Test 1931A: Challenger MT975C. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2355