Abstract: The present invention pertains an onboard device for checking the quality of DEF in a work machine, comprising a flow channel configured to fluidly connect a DEF inlet with a DEF tank. The flow channel comprises a DQS configured to be brought into contact with DEF passing through the flow channel. The present invention also pertains to a method of checking the quality of DEF comprising the steps of tilling DEF into a flow channel configured to fluidly connect a DEF inlet with a DEF tank; and checking, by means of a DQS, the quality of the DEF in the flow channel.

Abstract: A rotary thresher for a combine harvester including at least a first concave and a second concave, which may be rotated around a rotor to move to or from a threshing position or one or more of one or more resting positions. The concaves are mounted in a frame that is configured to rotate around the rotor such that the second concave moves during rotation from a first resting position to the threshing position while the first concave is moved from the threshing position to a second resting position.

Abstract: A rotary thresher for a combine harvester including a plurality of concaves which may be rotated around a rotor to move to or from a threshing position or one or more of one or more resting positions.