Case IH CVX 120-170 / Steyr CVT 120-170

Steyr developed a stepless transmission in the 1990s at the same time as ZF, and the situation did not change even after ZF purchased Steyr’s transmission production. The Case IH and Steyr S-Tronic transmission was announced at the end of 1997, but it only went on sale at the beginning of 2000. The transmission was fundamentally quite similar to the ZF stepless transmission used by JD (John Deere) and DF (Deutz-Fahr). It had four speed ranges, and the share of mechanical drive in the main working areas was greater than in Fendt’s Vario. Instead of a throttle pedal, there was a speed pedal, and electronics adjusted the engine speed suitably, taking into account power demand and efficiency. The speed range was either 0-40 km/h or 0-50 km/h.

The transmission was controlled via buttons on the armrest handle. The direction change lever was located on the armrest as well as under the steering wheel on the left side. There was no neutral position on the direction selector. The cab’s basic structure was the same as Case IH’s cab built in France for the large CS models.

The engines were also the same 6-cylinder SisuDiesels as in the CS 120-150 models. At the top of the range, there was also a 170-horsepower version. The engines featured electronic control and a viscous fan. The constant power range was between 1850-2300 rpm, and torque increase was 37%. The engine and transmission communicated via a CAN bus.

The hydraulics were load-sensing and had an output of 116 liters per minute. The four external hydraulic valves were electrically controlled, and one valve also had timer control. The power take-off had four speeds, typical of Steyr. The front axle was standard equipped with Carraro hydraulic independent suspension. The cab was also suspended, and the lift had anti-sway damping.

The Steyr CVT was available, alongside the traditional red and white version, also as a silver and black Exclusiv model, which had more extensive standard equipment.

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