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Steiger Cougar III ST-251

Steiger Cougar III ST-251 tractor
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The Steiger Cougar III ST-251 is a four-wheel drive farm tractor produced by Steiger from 1976 to 1982. It features a powerful Cummins 14.0L 6-cylinder turbocharged diesel engine delivering 250 hp, with a choice of 10-speed or 20-speed transmissions. Built in Fargo, North Dakota, USA, it includes articulated power steering, hydraulic disc brakes, and a Safari Cab with heat and air-conditioning. The tractor has a wheelbase of 128 inches, weighs 26610 lbs shipping weight, and has a fuel capacity of 267 gallons. It is designed for heavy-duty agricultural tasks with robust hydraulics and optional rear hitch type III.
Steiger Cougar III ST-251Steiger tractorfarm tractor250 hp tractorCummins NT-855C engine10-speed transmission20-speed transmission4WD tractor
Power250 hp
Founded1976 - 1982
ModelST-251

Technical Specifications

Detailed specifications and technical data for Steiger Cougar III ST-251

Power

Engine power:250 hp (186.4 kW)
Drawbar (tested):199.04 hp (148.4 kW)
Drawbar (claimed):206 hp (153.6 kW)

Tires

Ag rear:23.1-34
Ag front:23.1-34

Engine

Type:turbocharged diesel
Model:Cummins NT-855C
Power:250 hp (186.4 kW)
Torque:850 lb-ft (1152.6 Nm)
Cooling:liquid-cooled
Starter:electric
Idle RPM:830-2260
Cylinders:6-cylinder
Rated RPM:2100
Torque RPM:1400
Bore/Stroke:5.50x6.00 inches (140 x 152 mm)
Displacement:855 ci (14.0 L)
Oil capacity:44 qts (41.6 L)
Starter volts:12
Coolant capacity:56 qts (53.0 L)
Compression ratio:14.1:1

Capacity

Fuel:267 gal (1010.6 L)
Hydraulic system:33 gal (124.9 L)

Dimensions

Width:96 inches (tractor body) (243 cm)
Length:252 inches (640 cm)
Rear axle:Raba 598
Wheelbase:128 inches (325 cm)
Front axle:Raba 598
Max weight:34000 lbs (15422 kg)
Shipping weight:26610 lbs (12070 kg)
Height (exhaust):155.8 inches (395 cm)

Electrical

Ground:negative
Batteries:2
Battery AH:208
Battery Group:8D
Battery volts:12
Charging amps:90
Charging system:alternator

Hydraulics

Type:open center
Valves:4
Capacity:33 gal (124.9 L)
Pressure:2250 psi (155.1 bar)
Pump flow:30.8 gpm (116.6 lpm)

Mechanical

Cab:Safari Cab standard with heat and air-conditioning
Drive:Four-wheel drive
Brakes:Hydraulic disc brakes
Steering:Articulated power steering
Final drives:outboard planetary

Production

Series:III Series
Built in:Fargo, North Dakota, USA
Drive type:Four-wheel Drive (4WD) tractor
Original price:$75,000 in 1982
Years produced:1976 - 1982

Transmission

Note:Ten-speed transmission with two-speed transfer case.
Options:10-speed, 20-speed
10-speed gears:10 forward and 2 reverse
20-speed gears:20 forward and 4 reverse
10-speed clutch:hydraulic dry discs
20-speed clutch:394mm dry disc
10-speed transmission:Spicer SST 1010

Tractor hitch

Rear Type:III Optional

Serial Numbers

1976:106-00001
1977:106-00166
1978:106-00256
1979:106-00370
1980:106-00737
1981:106-01055
1982:106-01501