Abstract: An agricultural vehicle is disclosed having a screen provided with an array of soft buttons and connected to a computer programmed to display on the screen menu items selectable by operation of the soft buttons. In the invention, an additional input device is provided for selecting a menu item from those displayed on the screen, the input device comprising a continuously rotatable knob which is also axially depressible to select an item from a displayed menu, rotation of the knob serving to change the menu item that is selected upon depression of the knob.

Abstract: Steering equipment for a work vehicle includes a steering transmission shaft mounted so that the shaft can turn within a steering column, and with a control device for actuating a steering operating unit. The control device includes a reference member, which can move along the transmission shaft and a sensor device fixed to the steering column in a position substantially facing the reference member for detecting a position of the reference member along the transmission shaft. The sensor provides a displacement signal that is used to vary the steering ratio, such as steering speed.

Abstract: Steering equipment for a work vehicle includes a steering transmission shaft mounted so that the shaft can turn within a steering column, and with a control device for actuating a steering operating unit. The control device includes a reference member, which can move along the transmission shaft and a sensor device fixed to the steering column in a position substantially facing the reference member for detecting a position of the reference member along the transmission shaft. The sensor provides a displacement signal that is used to vary the steering ratio, such as steering speed.

Abstract: A transmission is described for a motor vehicle having selectable four-wheel drive. The transmission includes a coupling for selectively applying torque to the front wheels of the vehicle to switch between two-wheel drive and four-wheels drive in dependence upon slipping of the driven wheels. The coupling includes a drive member rotatable with the rear wheels, a driven member rotatable with the front wheels, the drive and driven members being movable axially relative to one another. The drive and driven member have teeth which mesh with one another in a first relative axial position of the drive and driven members to transmit torque from the drive to the driven member, but which are disengaged from one another in a second relative axial position of the drive and driven members to disconnect the drive to the front wheels.