An agricultural vehicle includes a chassis; a threshing and separating assembly carried by the chassis; and a cleaning system carried by the chassis and configured to receive crop material that has passed through the threshing and separating assembly. The cleaning system includes a pan configured to receive crop material from the threshing and separating assembly on a pan surface and to shake in a fore-to-aft direction; at least one sieve located below the pan and configured to shake in fore-to-aft and lateral directions, the sieve including a sieve surface configured to receive crop material from the pan; and at least one divider associated with and extending at least 3 centimeters above at least one of the pan surface and the sieve surface.

A combine harvester including at least one straw walker extending in a longitudinal direction of the harvester and supported by a front and rear shaft. The shafts are rotatable about respective rotation axes, and each shaft provided with one or more eccentric portions. The straw walker is rotatably mounted on an eccentric portion of the respective front and rear shafts, so that the simultaneous rotation of the shafts actuates a reciprocating motion of the straw walker. The combine further comprises a pivot frame and one or more actuators, configured to adjust the angular position of the frame by pivoting the frame about a pivot axis oriented transversally to said longitudinal direction. The front and rear shafts are configured to rotate with respect to the pivot frame, so that the straw walker's angular position is adjustable while the straw walker executes said reciprocating motion.

A cleaning system for an agricultural harvester includes: at least one sieve; a cleaning blower directed at the at least one sieve and configured to supply a cleaning air flow directed at the at least one sieve; and a conveyor assembly configured to supply crop material to the at least one sieve. The conveyor assembly includes: a conveyor frame; a shaker coupled to the conveyor frame and configured to shake the conveyor frame; and an endless conveyor carried by the conveyor frame and including a conveyor loop with a substantially solid surface and a conveyor driver coupled to the conveyor loop, the conveyor driver being configured to selectively rotate the conveyor loop.

A sieve for use in an agricultural harvester includes a framework with a pair of opposed side members. A plurality of overlapped louvres extend between the pair of opposed side members and are overlapped relative to each other. The opposed side members are each comprised of an extruded metal side member with a partially open elongate channel having a predefined cross section, and a polymeric strip having a mating cross section carried within the elongate channel.

A crop processing system in a combine harvester for directing grain and MOG on a return pan, having a crop processor arranged to thresh and separate grain from a crop stream, a return pan located below a rear portion of the crop processor to collect separated material falling from the crop processor and convey the material forward with respect to the normal forward direction of travel of the combine harvester, a plurality of paddles on the return pan, an inclinometer which measures the angle of the slope of the combine to the horizontal, and an ECU coupled to the paddles and able to command one or more actuators coupled to the paddles and adjust them to a preferred position according to the slope of the combine.

A cleaning shoe for a combine harvester, including a frame, a sieve and at least one reciprocating mechanism attached to the sieve for reciprocating the sieve in a forwards and backwards motion and the reciprocating mechanism includes an eccentric drive housing, pivotably mounted to the frame, and arranged to rotate around a pivot point thus changing its angle to the horizontal, and an actuator connected to the eccentric drive housing, which varies the angle to the horizontal of the reciprocating motion of the sieve by varying the angle to the horizontal of the eccentric drive housing.

A grain cleaning apparatus comprises a stratification pan for receiving material from a threshing system of a combine harvester. Material is divided into lanes on the stratification pan by dividers, and at least some of the dividers are provided with a respective pivotable guide plate for guiding material into a lane at a selected side of the divider. The pivoting of the guide plates is controlled in dependence on a lateral inclination of the combine harvester.