The Opti-Clean system optimizes the strike and the throwing angles of each of the main components in CR9000 Elevation models. The grain pan is not coupled with the pre-sieve and top sieve so that each element can operate as its optimum efficiency. The cascade distance between the grain pan and the pre-sieve is increased for greater capacity, while a long sieve stroke and a steep throwing angle keep more material airborne, for even a higher cleaning efficiency. The opposing motion of the grain pan and bottom sieve to the pre-sieve reduces overall machine vibrations and increases operator comfort.
