Abstract: A combine harvester is provided with a threshing system, a preparation arrangement and cleaning arrangement. The preparation arrangement comprises multiple preparation stages, each of said stages being configured to transport said mixture over a given distance between a front edge and a rear edge of the stage, with an air gap being present between each pair of consecutive stages. The preparation arrangement further comprises a blower, separate from the main blower, said blower configured to direct air towards at least one of said air gaps, to thereby blow at least a portion of said mixture towards the rear of the combine harvester. The preparation arrangement comprises a plate provided with fins mounted transversally with respect to the longitudinal direction of the harvester, each fin representing one of said preparation stages, the plate further comprising one or more openings between at least one pair of consecutive fins.

Abstract: A combine harvester having a cleaning system for separating seeds from by-products, that includes a transmission having an annular member, that extends around a circular element of an eccentric device and is pivotable around said circular element, a second arm having a first end fixedly connected to the annular member, and a second end connected with a reciprocatable cleaner device of a second cleaner assembly, a first arm having a first end fixedly connected to the annular member, a first cleaner drive linkage has a first end pivotably connected to the second end of the first arm and a second end connected to a reciprocatable cleaner device of a first cleaner assembly, wherein the reciprocatable cleaner device of the second cleaner assembly and the reciprocatable cleaner device of the first cleaner assembly are reciprocatingly drivable by the cleaning system drive assembly in generally opposite directions.

Abstract: A method and system for use with the combine to modify tailings conveyed to a cleaning system grain bed. Methods and systems are provided that utilize one or more sensors to detect uneven distribution of crop material in the grain bed, which provides information for a controller to determine whether adjustments to a tailings distribution system is needed to encourage even distribution of crop material in the grain bed. Elements in the tailings distribution system can be adjusted to alter direction of tailings conveyed to the grain bed to encourage even distribution of crop material on the grain bed. The system may also inform an operator of suggested manual adjustments to mitigate the non-uniformity.