Steiger Cougar III ST-270 Tractor

Manufacturer	Steiger
Price	78,000(USD)
Model	Cougar III ST-270
Equipment Type	Four-wheel Drive 4WD Tractors
Factory	Fargo, North Dakota, USA

NEBRASKA TRACTOR TEST 1238

Description

10-speed 4WD April 18 - May 2, 1977 Link: Nebraska Tractor Test 1238 file

STEIGER COUGAR III ST-270 POWER

Engine

270hp / 201.3kW

ENGINE DETAIL

The Steiger Cougar III ST-270 features a robust Caterpillar 3306 turbocharged diesel engine, delivering 270 hp and 775 lb-ft of torque at 1400 RPM, which provides strong low-end power ideal for heavy tillage and hauling tasks. Its high compression ratio of 17.5:1 enhances fuel efficiency but may require higher-grade fuel to mitigate knocking. Key considerations include the substantial 29-quart oil and 56-quart coolant capacities, which ensure adequate lubrication and cooling during extended operation, but may increase maintenance complexity.

Description	Caterpillar 3306 turbocharged aftercooled diesel 6-cylinder liquid-cooled
Displacement	638ci / 10.5L
Bore/Stroke	4.75x6.00inches / 121x 152mm
Power	270hp / 201.3kW
Compression	17.5:1
Rated RPM	2200
Idle RPM	830-2470
Torque	775lb-ft / 1050.9Nm
Torque RPM	1400
Starter volts	12
Oil capacity	29qts / 27.4L
Coolant capacity	56qts / 53.0L

STEIGER COUGAR III ST-270 ENGINE

The Steiger Cougar III ST-270 is powered by a robust Caterpillar 10.5L 6-cylinder diesel engine, delivering strong torque suitable for heavy-duty agricultural tasks. With a substantial 267-gallon fuel tank, this tractor is optimized for extended operation without frequent refueling, making it ideal for large farming operations or remote tasks. However, the vehicle's size and weight may present challenges in maneuverability in tighter spaces.

Description	Caterpillar 10.5L 6-cyl diesel
Fuel tank	267gal / 1010.6L

TRANSMISSIONS OVERVIEW

The Steiger Cougar III ST-270 features a robust 10-speed transmission with an optional 20-speed upgrade, enhancing operational efficiency and versatility across varying field conditions. The 20-speed configuration allows for finer control over speed and torque, which is beneficial for intricate tasks like planting or tilling in uneven terrains. However, operators should be aware of the increased complexity in maintenance and potential for more frequent repairs associated with additional gears.

Description

10-speed 20-speed

TRANSMISSION 1

The Steiger Cougar III ST-270 features a 10-speed forward and 2-speed reverse gear system, providing versatile torque management and operational flexibility for various field conditions. Its hydraulic dry disc clutch ensures smooth engagement and disengagement, enhancing drivability but may require more frequent maintenance compared to wet clutches. Ideal for heavy-duty tasks, it excels in high-torque applications but may pose challenges in very wet or muddy conditions where traction is key.

Gears	10 forward and 2 reverse
Clutch	hydraulic dry discs

TRANSMISSION 2

The Steiger Cougar III ST-270 features a Dana-Spicer 1010-3B transmission, providing 20 forward and 4 reverse gears, which enhances versatility in various field operations. Its ten-speed transmission combined with a two-speed transfer case allows for optimized power distribution across diverse terrains, improving maneuverability and traction. However, the 356mm dry disc clutch may present challenges in high-load scenarios, necessitating proper maintenance to prevent slippage and maximize efficiency.

Transmission	Dana-Spicer 1010-3B
Gears	20 forward and 4 reverse
Clutch	356mm dry disc
Description	Ten-speed transmission with two-speed transfer case

MECHANICAL

The Steiger Cougar III ST-270 features a 4x4 articulated chassis with outboard planetary final drives, providing superior traction and stability on uneven terrain, beneficial for heavy-duty applications. Its hydrostatic power steering enhances maneuverability, while the hydraulic disc brakes offer reliable stopping power in demanding conditions. The option for 10-speed and 20-speed transmissions allows for versatility in operational speed, making it suitable for both fieldwork and transport scenarios, though the complexity of the transmission may require more maintenance.

Chassis	4x4 articulated 4WD
Final drives	outboard planetary
Steering	hydrostatic power
Brakes	hydraulic disc
Cab	Safari Cab standard with heat and air-conditioning
Transmissions	10-speed 20-speed

HYDRAULICS

Type	open center
Pressure	2250psi / 155.1bar
Valves	4
Pump flow	29.2gpm / 110.5lpm

TRACTOR HITCH

Rear Type

3 (optional)

STEIGER COUGAR III ST-270 TIRES

The Steiger Cougar III ST-270 features a robust 23.1-34 tire configuration, which enhances traction on varied terrains, making it suitable for heavy-duty agricultural applications. Its high flotation design minimizes soil compaction, promoting sustainable farming practices. However, the large tire size may pose challenges in maneuverability within tighter spaces, such as small fields or crowded work environments.

Ag front	23.1-34
Ag rear	23.1-34

DIMENSIONS

Wheelbase	128inches / 325cm
Length	252inches / 640cm
Width	96inches / 243cm (tractor body)
Height (exhaust)	155.8inches / 395cm
Shiping weight	26,250lbs / 11907kg
Max weight	34,000lbs / 15422kg
Clearance (rear axle)	20inches / 50cm
Front axle	Raba 598
Rear axle	Raba 598

DIMENSIONS & TIRES

The Steiger Cougar III ST-270 features a substantial 128-inch wheelbase which enhances stability during heavy-duty applications such as plowing or tilling. Its weight of 26,250 lbs contributes to traction and reduces soil compaction, beneficial for performance in varied terrains. However, the large 23.1-34 tires may limit maneuverability in tighter spaces, making it less suitable for smaller fields or orchards.

Wheelbase	128inches / 325cm
Weight	26,250lbs / 11907kg
Front tire	23.1-34
Rear tire	23.1-34

COUGAR III ST-270 SERIAL NUMBERS

1977	105-00330
1978	105-00477
1979	105-00658
1980	105-00872
1981	105-0100

ELECTRICAL

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

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