Tractors
Productivity and performance

Case IH has added performance across both the wheeled and Quadtrac versions of its Steiger tractors. Increased drawbar horsepower in six new models is being put to work in a durable package designed to drive power to the ground, while still going easy on operators and fuel. The models were introduced in early 2006.

New Tier 3 compliant, 24 valve electronic engines provide power for all six models, topping out with the STX530 rated at 530 horsepower in wheeled, Quadtrac and scraper configurations. A 15 litre Cummins QSX15 engine offers 40 percent torque rise, growing an additional 54 horsepower at 1800rpm.

Like the STX530, the other five new models also match engine horsepower to their names. The wheeled STX280 and STX330, which feature AccuSteer versions, use new 8.3 litre and nine litre engines, respectively. Both the STX380 and the STX430 share a new 12.9 litre Case IH engine with 40 percent torque rise and are available in wheeled, heavy-duty wheeled, scraper and Quadtrac configurations. The STX480 offers the same configurations as the STX380 and STX430, and is powered by the same engine as the STX530. These electronic engines continually monitor operating conditions and adjust fuel and air flows. By automatically optimizing performance, engine life and fuel efficiency are improved.

Each of the in-line, six cylinder engines are turbocharged and air-to-air aftercooled using an efficient cross-flow head design that intakes air from one side and vents exhaust directly out the other side. Compared to systems that exhaust air on the same side as the air intake, the cross-flow head keeps air cooler, provides smooth air flow and better coolant circulation for longer engine life.

To accommodate the extra cooling needs of higher horsepower engines, the engine air filter for the STX380, STX430, STX480 and STX530 tractors has been relocated under the hood, improving the efficiency of air flow and filter life. Engine speeds have also been decreased to 2000rpm for the majority of the line, rising to 2100rpm on the STX530.

To improve ride, reduce operator fatigue and extend the life of the transmission, the Case IH 16F/2R speed full powershift transmission has been upgraded with electronic pulse width modulated (PWM) shift solenoids. During a gear change, these solenoids will modulate the pressure to the clutch packs for smooth engagement. Producers can further automate their operations with the electronic end-of-row function. The system will record and then control up to 30 steps in two sequences, including up and down shifting, raising and lowering the three-point hitch, using remotes, throttle and more, through a single switch, greatly simplifying operation at the headlands.