Search
Find your tractor.
Menu ☰
Years in Production / 1976–1982
Steiger
Cougar III ST-251
Explore the specifications, hardware, and original references for the Steiger Cougar III ST-251.
250hp
Source index power
4x4 Only
Drive
1976–1982
Production years
Steiger
Manufacturer
Cougar III ST-251 / 01
At a glance
Production
Four-wheel Drive (4WD) tractor
Built in Fargo, North Dakota, USA
Original price was $75,000 in 1982
- Manufacturer
- Steiger
Mechanical
Four-wheel drive
Articulated power steering
Hydraulic disc brakes
Safari Cab standard with heat and air-conditioning.
- Final Drives
- outboard planetary
Capacity
- Fuel
- 267 gal1010.6 L
- Hydraulic System
- 33 gal124.9 L
Hydraulics
- Type
- open center
- Capacity
- 33 gal124.9 L
- Pressure
- 2250 psi155.1 bar
- Valves
- 4
- Pump Flow
- 30.8 gpm116.6 lpm
Hitch
- Rear Type
- III OptOptional
Electrical
- Ground
- negative
- Charging System
- alternator
- Charging Amps
- 90
- Batteries
- 2
- Battery Volts
- 12
- Battery Ah
- 208
- Battery Group
- 8D
Cougar III ST-251 / 02
Under the hood
Engine Detail
Cummins NT-855C
turbocharged diesel
6-cylinder
liquid-cooled
- Displacement
- 855 ci14.0 L
- Bore Stroke
- 5.50x6.00 inches140 x 152 mm
- Power
- 250 hp186.4 kW
- Compression Ratio
- 14.1:1
- Rated Rpm
- 2100
- Idle Rpm
- 830-2260
- Torque
- 850 lb-ft1152.6 Nm
- Torque Rpm
- 1400
- Starter
- electric
- Starter Volts
- 12
- Oil Capacity
- 44 qts41.6 L
- Coolant Capacity
- 56 qts53.0 L
- Cylinders
- 6
- Cooling
- liquid-cooled
Cougar III ST-251 / 03
Gears & controls
Transmission (Option 1)
- Transmission
- Spicer SST 1010
- Gears
- 10 forward and 2 reverse
- Clutch
- hydraulic dry discs
Transmission (Option 2)
Ten-speed transmission with two-speed transfer case.
- Gears
- 20 forward and 4 reverse
- Clutch
- 394mm dry disc
Cougar III ST-251 / 04
Size. Stance. Footprint.
Dimensions
- Length
- 252 in640 cm
- Width
- 96 in243 cm
- Height
- 155.8 in395 cm
- Wheelbase
- 128 in325 cm
Dimensions And Tires
- Wheelbase
- 128 inches325 cm
- Weight
- 26610 lbs12070 kg
- Front Tire
- 23.1-34
- Rear Tire
- 23.1-34
Tires And Tracks
- Front Ag
- 23.1-34
- Rear Ag
- 23.1-34
Cougar III ST-251 / 05
Tests (NTTL)
Nebraska Tractor Test 1233
Diesel 10-speed 4WDMarch 26 - April 30, 1977
Drawbar performance
Gear 6 used for power test.
Gear 2 used for pull test.
- Id
- 1233
- Max Power
- 199.04 hp148.4 kW
- Fuel Use
- 13.5 gal/hour51.1 l/hour
- Max Pull
- 26,880 lbs12192 kg