A harvester grain unloading auger may have auger flights within an unloader housing, wherein a discharge speed adjustment mechanism is coupled to the unloader housing to receive grain from the grain unloading auger at a first speed. The discharge speed adjustment mechanism discharges the grain at a second speed greater than the first speed.

A harvester grain unloading auger may have auger flights within an unloader housing, wherein a discharge speed adjustment mechanism is coupled to the unloader housing to receive grain from the grain unloading auger at a first speed. The discharge speed adjustment mechanism discharges the grain at a second speed greater than the first speed.

In a combine, each of a plurality of dust-sending valves 30B includes a first dust-sending member 31 provided in an upper portion of a threshing chamber 16 in a state of extending in a left-right direction of a threshing chamber and in a state in which a sending angle is changeable by swinging, and a second dust-sending member 32 provided in a state of being fixed to a position located on an upstream side in a rotation direction of a threshing cylinder with respect to the first dust-sending member 31 such that a sending angle is not changeable. A portion of a top plate 19 facing the second dust-sending member 32 has an arc shape as viewed in a direction along a rotation axis P of a threshing cylinder 20.

A combine includes a sorter 2B including a sieve case 23 drivable to swing; a first chaff sieve 27 held by the sieve case 23 and configured to receive a processing target falling through a receiver net 8 and sort the processing target; a second chaff sieve 28 held by the sieve case 23 in such a manner as to coincide with the first chaff sieve 27 in the front-back direction relative to the sorter 2B and configured to receive a processing target falling through the first chaff sieve 27 and sort the processing target; and a winnowing fan 29 configured to blow sorting air along the first and second chaff sieves 27 and 28.

A combine harvester has at least one rotor oriented in the longitudinal direction of the harvester and configured to separate grains and light chaff from a stream of residue material transported to the distal end of the rotor, where said stream is ejected downwards into a chopper housing. The chopper housing has a pair of chopper wheels configured so that the stream of residue material is ejected directly into the area between said chopper wheels, with essentially no residue being allowed to enter the space between the circumference of the wheels and the sidewalls of the chopper housing. The harvester also has a spreader with a pair of laterally placed spreader openings in the chopper housing, preferably with a pair of spreader snouts mounted on said openings.

A combine harvester has at least one rotor oriented in the longitudinal direction of the harvester and configured to separate grains and light chaff from a stream of residue material transported to the distal end of the rotor, where said stream is ejected downwards into a chopper housing. The chopper housing has a pair of chopper wheels configured so that the stream of residue material is ejected directly into the area between said chopper wheels, with essentially no residue being allowed to enter the space between the circumference of the wheels and the sidewalls of the chopper housing. The harvester also has a spreader with a pair of laterally placed spreader openings in the chopper housing, preferably with a pair of spreader snouts mounted on said openings.

An agricultural combine has a threshing drum and a matching concave, the threshing drum comprising multiple threshing slats having an outer surface segment which, when the drum is rotated with respect to the concave with crop material in the drum, beats and squeezes the crop material thereby releasing grain from residue in the crop material, wherein at least the outer surface segment is formed from a material having a Shore A hardness higher than 90 and lower than 95.

An agricultural combine has a threshing drum and a matching concave, the threshing drum comprising multiple threshing slats having an outer surface segment which, when the drum is rotated with respect to the concave with crop material in the drum, beats and squeezes the crop material thereby releasing grain from residue in the crop material, wherein at least the outer surface segment is formed from a material having a Shore A hardness higher than 90 and lower than 95.

An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester. The vane system includes a vane having 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; a first flat portion proximate an end of the vane on the outer profile; and a second flat portion proximate to another end of the vane on the outer profile.

Methods and systems utilize multiple components to improve the threshing operation within an agricultural combine. The methods and systems include a unique concave design, open valley rasp bars, and restrictor plates. Application of the methods and systems' components allows more efficient threshing operations for large grains such as corn and, also, for small grains such as soybeans resulting in an increased capture and retention of seed from the threshing operation.