Challenger MT635

Last Updated: July 2024

Overview

The Challenger MT635 is a row-crop tractor with a 4x4 MFWD four-wheel-drive chassis, power steering, and an 18-speed power shift transmission with 6 reverse gears for a total of 24 gears. Its 6-cylinder Sisu turbocharged, aftercooled, liquid-cooled diesel engine (model: Crankshaft lengthwise, Serial No. H18085) has a displacement of 449 cubic inches, bore of 4.251 inches, stroke of 5.278 inches, and a rated power output of 174.62 HP at 1950 rpm. It is fitted with rear 18.4R42 and front 14.9R30 tires. With an operating weight of 18975 lbs, this tractor has robust capabilities for heavy-duty tasks. Key dimensions are 203 inches length, 98.2 inches width, and 121 inches height for the cab. Additional features include a closed center pressure flow compensated hydraulic system, power take-off specifications, multiple wet disc brakes, and detailed hydraulic/drawbar performance data from independent testing.
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Key Specifications

Category: Row Crop

Transmission: Power shift

Drive Type: 4WD

Operating Weight: 18975

Fuel Type: Diesel

Challenger MT635 vs. Similar Tractors

Operating Weight
Average
Greater than 68% of similar tractors.

Technical Specifications

Engine

Manufacturer
Sisu
Model
-
Cooling Type
Liquid-cooled
Cylinder Orientation
Vertical
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Turbocharged aftercooled
Cylinders
6
Displacement (ci)
449
Bore (in)
4.251
Stroke (in)
5.278
Rated RPM
2200
Power Output (hp)
-

Transmission

Type
Power shift
Forward Gears
18
Reverse Gears
6
Total Gears
-

Dimensions

Length (in)
203
Width (in)
98.2
Height (in)
121 (cab)
Operating Weight (lb)
18975

Power Take-Off (PTO)

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

Miscellaneous

Chassis
4x4 MFWD 4WD
Drive Type
4WD
Steering Type
Power
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
Rear tires - Two 18.4R42; Front tires - Two 14.9R30
Manufacture - End Year
-
Hitch Type
Type III
Hitch Category
-
Hitch Position
Rear
Hitch Capacity (lb)
-
Operator Station Type
Cab
Starter Type
Electric
Brake Type
-
Hydraulic System Type
Closed center pressure flow compensated (PFC)

Test Results

Nebraska Tractor Test Laboratory - Test Date: September 15-26, 2000

Maximum Power and Fuel Consumption

  • Maximum Power: 174.62 HP (130.21 kW) at 1950 rpm
  • Fuel Consumption at Maximum Power: 9.88 Gal/hr (37.42 l/h) with a fuel efficiency of 0.398 lb/hp.hr (0.242 kg/kW.h)
  • Fuel Efficiency: 17.67 Hp.hr/gal (3.48 kW.h/l)

Drawbar Performance

  • Power at Rated Engine Speed: 164.45 HP (122.63 kW) at 2200 rpm with a drawbar pull depending on gear
  • Varying Power Fuel Consumption:
  • 144.09 HP (107.45 kW) at 2269 rpm, 9.48 Gal/hr (35.87 l/h), fuel efficiency of 0.462 lb/hp.hr (0.281 kg/kW.h)
  • 109.03 HP (81.31 kW) at 2293 rpm, 7.90 Gal/hr (29.89 l/h), fuel efficiency of 0.509 lb/hp.hr (0.310 kg/kW.h)

Torque and Engine Performance

  • Maximum Torque: 561 lb.-ft. (761 Nm) at 1350 rpm
  • Torque Rise: 43.0%

Hydraulic Performance

  • Pump Delivery Rate at Minimum Pressure: 29.7 GPM (112.4 l/min)
  • Pump Delivery Rate at Maximum Hydraulic Power: 22.7 GPM (85.9 l/min)
  • Hydraulic Power: 35.6 HP (26.6 kW) at 2690 psi (185 bar)

Overall Efficiency

  • Fuel Efficiency at Standard PTO Speed (1000 rpm): 16.82 Hp.hr/gal (3.31 kW.h/l)
  • Fuel Consumption: 10.19 Gal/hr (38.59 l/h) at 2092 rpm



NTTL.(2003).Tractor test 1781C: Challenger MT635 Diesel. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2293

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