Steiger Cougar III ST-270

Last Updated: July 2024

Overview

The Steiger Cougar III ST-270 is a powerful four-wheel drive articulated tractor designed for heavy agricultural applications. Powered by a Caterpillar 3306 turbocharged aftercooled diesel engine with a 17.5:1 compression ratio, it generates 270 horsepower at 2,200 RPM. The engine has a displacement of 638 cubic inches and a bore of 4.75 inches with a 6-inch stroke. The transmission is a selective gear fixed ratio type with 20 forward and 4 reverse gears, offering advertised speeds from 1.9 mph to 16.7 mph. The tractor features a direct engine drive hydraulic control system and sits on 23.1-34 front and rear tires with 8 ply rating and specified inner/outer psi. It has an operating weight of 29,930 lbs with the operator and dimensions of 252 inches in length, 96 inches in width, and 155.8 inches in height. The tractor's robust design, powerful engine, and capable transmission make it suitable for demanding agricultural tasks requiring substantial traction and drawbar performance.
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Key Specifications

Category: Utility, Four-Wheel Drive

Power Output: 270

Transmission: Selective gear fixed ratio

Drive Type: 4WD

Operating Weight: 29930

Fuel Type: turbocharged aftercooled diesel

Steiger Cougar III ST-270 vs. Similar Tractors

Power Output
Excellent
Greater than 94% of similar tractors.
Operating Weight
Above Average
Greater than 71% of similar tractors.

Technical Specifications

Engine

Manufacturer
Caterpillar
Model
3306
Cooling Type
liquid-cooled
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
turbocharged aftercooled diesel
Induction Type
turbocharged aftercooled
Cylinders
6
Displacement (ci)
638
Bore (in)
4.75
Stroke (in)
6
Rated RPM
2200
Power Output (hp)
270

Transmission

Type
Selective gear fixed ratio
Forward Gears
20
Reverse Gears
4
Total Gears
-

Dimensions

Length (in)
252
Width (in)
96
Height (in)
155.8
Operating Weight (lb)
29930

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)
56
Front Tire Diameter (in)
34
Front Tire Width (in)
-
Rear Tire Diameter (in)
34
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
-
Manufacture - End Year
-
Hitch Type
-
Hitch Category
Category 3
Hitch Position
-
Hitch Capacity (lb)
-
Operator Station Type
-
Starter Type
Electric
Brake Type
-
Hydraulic System Type
open center

Test Results

Nebraska Tractor Test Laboratory - Test Date: April 18 to May 2, 1977

Maximum Power and Fuel Consumption

  • Maximum Power: 218.74 HP (163.12 kW) at 2200 rpm
  • Fuel Consumption at Maximum Power: 16.419 Gal/hr (62.134 l/h) with a fuel efficiency of 0.518 lb/hp.hr (0.313 kg/kW.h)

Drawbar Performance

  • Maximum Available Power—Two Hours: 218.74 HP (163.12 kW) with a drawbar pull of 12877 lbs (57.28 kN) and a speed of 6.37 mph (10.23 km/h)
  • 75% of Pull at Maximum Power—Ten Hours: 181.02 HP (134.99 kW) with a drawbar pull of 10114 lbs (44.99 kN) and a speed of 6.71 mph (10.80 km/h)
  • 50% of Pull at Maximum Power—Two Hours: 124.81 HP (93.07 kW) with a drawbar pull of 6698 lbs (29.79 kN) and a speed of 6.99 mph (11.24 km/h)

Sound Level

  • Maximum Available Power—Two Hours: 80.0 dB(A)
  • 75% of Pull at Maximum Power—Ten Hours: 80.0 dB(A)
  • 50% of Pull at Maximum Power—Two Hours: 80.5 dB(A)

Tractor Specifications

  • Engine Make: Caterpillar Diesel
  • Type: 6-cylinder vertical with turbocharger and intercooler
  • Transmission: Selective gear fixed ratio with advertised speeds from 1.9 mph to 16.7 mph (3.0 km/h to 26.9 km/h)
  • Static Weight with Operator: Rear 13000 lbs (5897 kg), Front 16930 lbs (7679 kg), Total 29930 lbs (13576 kg)



NTTL.(1977). Nebraska Tractor Test 1238 for Steiger Cougar III ST-270 Diesel. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/1558

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