A fan unit for a combine harvester cleaning unit having at least two fan wheels, each fan wheel being enveloped by a fan wheel housing having at least one inlet segment and at least one outlet segment extending tangentially from the fan wheel housing, each outlet segment being connected to a common channel section and each vertical side wall of an outlet segment adjacent another outlet segment is inclined toward the vertical side wall of the adjacent outlet segment. This construction has as an advantage that it allows for improved flow characteristics of the air exiting the outlet thereby permitting better separation of MOG and grain in the sieves of the cleaning unit of which the fan unit is a part.

An agricultural motor vehicle able to connect to a variety of agricultural implements, and comprising a structural set having four parts: a lower chassis, an intermediate structure, a front complementary structure, and a rear complementary structure. The set is supported over a set of front traction wheels and a set of smaller rear wheels and also houses a vibrating sieve, above which is located a beating cylinder, the front edge of which connects to a concentrating guiding roller and a hinged inlet nozzle, as well as a cockpit and a grain dumper located over the set. Preceding the grain dumper is a clean grain collection gutter, a motor power set, a suction cleaning set, a clean grain elevator and lastly, a retractable side belt, whose lower edge is hinged at its midpoint and located on the upper edge of the intermediate structure.

A grain cleaning system in an agricultural harvester, that includes a chaff pan with a pivotal axis near an end of the chaff pan. The chaff pan has a dual locking system coupled thereto for holding the chaff pan in two different positions. The dual locking system has a first over-center locking arrangement and a second over-center locking arrangement. The first locking arrangement is used to hold the chaff pan in an upward position when the first locking arrangement is locked. The first locking arrangement includes a first linkage element; and a second linkage element. The second locking arrangement holds the chaff pan in a locked downward position when the second locking arrangement is locked. The second locking arrangement includes a first linkage element; and a second linkage element. The first linkage element of the first locking arrangement is also the first linkage element of the second locking arrangement.

A combine harvester having a grain pan arranged to catch a crop stream, the grain pan being driven in an oscillating manner to convey the crop stream rearwardly to a rear edge. A cleaning unit including a fan for generating a cleaning airstream which is directed under the rear edge. The grain pan includes a floor profile which defines a transverse profile comprising ridges and troughs. The troughs provide a plurality of longitudinal channels, wherein the ridge-to-trough height increases in the direction of conveyance. Crop material conveyed by the grain pan experiences channels that deepen towards the rear edge of the pan.

A combine grain cleaning system having front and rear rollers, a conveyor belt having an upper surface extending from the front roller to the rear roller, a motor operatively connected to the conveyor belt and configured to drive the upper surface in a belt travel direction from the front roller to the rear roller, and a baffle located adjacent the rear roller. The baffle has a leading edge, a trailing edge located behind the leading edge with respect to the belt travel direction and below the leading edge with respect to a vertical direction, and a baffle surface extending from the leading edge to the trailing edge. One or more sieves are located below the baffle, and a fan is provided to direct an airflow at least partially upwards in the vertical direction adjacent the rear roller. A method for separating grain is also provided.

An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester includes a vane. The vane includes: a generally helically curved inner profile; a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane, the outer profile being configured to be positioned closer to the rotor cage than the inner profile; and a flat portion located midway along the outer profile.

A sieve for a harvester, wherein the sieve has a plurality of louvers and a plurality of cross members adjacent to each one of the plurality of louvers. Wherein, each of the cross members have a fluid channel that directs a fluid through the plurality of louvers.

A cleaning system for a combine harvester includes a fan, at least one duct having an interior passageway that is positioned to receive an air stream from the fan, and a surface defined within the interior passageway of the at least one duct that is configured to restrict a volume of the flow of air passing through the at least one duct and increase a pressure of the air stream passing through the duct.

An agricultural harvester includes a chassis and a residue handling system carried by the chassis. The residue handling system includes a set of rotating knives disposed in a housing, a first set of counter-knives, and a residue pivoting platform and/or a second set of counter-knives. Crop residue travels through the system in a residue flow direction. The first set of counter-knives are configured to enter the housing proximate to the set of rotating knives. The residue pivoting platform is positioned proximate to the first set of counter-knives in an upstream direction relative to the crop residue flow direction. The second set of counter-knives are configured to enter the housing proximate to the set of rotating knives. The second set of counter-knives are in a downstream direction relative to the crop residue flow from at least one of the residue pivoting platform and the first set of counter-knives.

A combine comprising a chassis, a crop residue handling system including a residue chopper, residue spreader, a spreader chute and a swath selection door, a receiver configured to determine a location of the combine, and a controller that controls the residue handling system. The controller configured to determine the location of the combine on a map, execute a crop residue spreading mode in response to the controller determining that the location of the combine is located in a designated crop residue spreading zone indicated on the map, and execute a crop residue windrow mode in response to the controller determining that the location of the combine is located in a designated crop residue windrow zone indicated on the map.