From the threshing unit, the crop enters the high-performance cleaning system. Here, the material is evenly distributed across the cleaning shoe and a grain and a chaff layer are formed. The two layers are separated by a powerful fan. The cleaning area of the Fendt CORUS 500 is 4.7 m². Electrically adjustable high-performance sieves are also available especially for use in high-yield areas. These work efficiently, cleanly and reduce grain losses even at high throughput. To prevent the material from slipping sideways on slopes, the adjustable sieves have high partitions. This prevents losses and increases the capacity of the sieves. The sieves can be easily pulled out for cleaning. Thanks to the gentle threshing system and the gentle separation and cleaning, the straw is ideally suited for further use as bedding or feed.