Steiger Cougar III ST-280

Last Updated: July 2024

Overview

The Steiger Cougar III ST-280 is a robust and hefty four-wheel-drive tractor, designed for large scale agricultural tasks that require substantial power and traction. It features a 4x4 articulated wheel configuration, offering exceptional mobility and maneuverability in various terrain conditions. The hydrostatic power steering aids in handling the substantial weight of the tractor which factors in at an operating weight of 30,500 pounds, scaling to a maximum capacity of 34,000 pounds. Engine options include a Cummins or Caterpillar six-cylinder diesel engine, each contributing substantially to the tractor's 280 horsepower output, suitable for demanding applications. The displacement of the engine is listed at either 855 or 893 cubic inches, with adjustments in the bore and stroke measurements corresponding to each version, alongside a robust 20-speed transmission system with 20 forward and 4 reverse gears. With large agricultural tires measuring 18.4 inches in width and 38 inches in diameter on both the front and rear, and a wheelbase of 128 inches, the Cougar III ST-280 provides a stable footprint for a wide range of farming activities.
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Key Specifications

Category: Utility, Four-Wheel Drive

Power Output: 280

Drive Type: 4WD

Operating Weight: 30500; 34000 (Max capacity)

Fuel Type: Diesel

Steiger Cougar III ST-280 vs. Similar Tractors

Power Output
Excellent
Greater than 94% of similar tractors.
Operating Weight
Excellent
Greater than 95% of similar tractors.

Technical Specifications

Engine

Manufacturer
Cummins; Caterpillar
Model
-
Cooling Type
-
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
Diesel
Induction Type
-
Cylinders
6
Displacement (ci)
855; 893
Bore (in)
5.50; 5.40
Stroke (in)
6.00; 6.50
Rated RPM
2100
Power Output (hp)
280

Transmission

Type
-
Forward Gears
20
Reverse Gears
4
Total Gears
24

Dimensions

Length (in)
252
Width (in)
96
Height (in)
155.8 (to exhaust)
Operating Weight (lb)
30500; 34000 (Max capacity)

Power Take-Off (PTO)

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

Miscellaneous

Chassis
4x4 articulated 4WD
Drive Type
4WD
Steering Type
Hydrostatic power
Coolant Capacity (qts)
61; 70
Front Tire Diameter (in)
38
Front Tire Width (in)
18.4
Rear Tire Diameter (in)
38
Rear Tire Width (in)
18.4
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
Manufacture - End Year
-
Hitch Type
Three-Point Hitch (optional)
Hitch Category
Category 3
Hitch Position
Rear
Hitch Capacity (lb)
-
Operator Station Type
-
Starter Type
Electric Starter (12 volts)
Brake Type
-
Hydraulic System Type
Open Center

Test Results

Nebraska Tractor Test Laboratory - Test Date: 1981

Maximum Power and Fuel Consumption

  • Maximum Power: Data not provided in provided text.
  • Fuel Consumption at Maximum Power: Data not provided in provided text.

Drawbar Performance

  • Power at Rated Engine Speed (10th Gear): Data not provided in provided text.
  • Fuel Consumption at Rated Speed: Data not provided in provided text.

Torque and Engine Performance

  • Maximum Torque: Data not provided in provided text.
  • Torque Rise: Data not provided in provided text.

Hydraulic Performance

  • Maximum Force Exerted: Data not provided in provided text.
  • Pump Delivery Rate: Data not provided in provided text.
  • Hydraulic Power: Data not provided in provided text.

Overall Efficiency

  • Fuel Efficiency at Standard PTO Speed (1000 rpm): Data not provided in provided text.
  • Fuel Consumption: Data not provided in provided text.



NTTL.(1981). Test 1401: Steiger Cougar III ST-280 diesel 20-Speed. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/1719

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