Steiger
Steiger Cougar III ST-251
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.
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 |