Rotary shoe cleaner

A rotary cleaning system for a combine harvester, the rotary cleaning system comprising:

• a hollow drum having a plurality of apertures along at least a portion of a length of an exterior surface of the drum, the drum having a feeding end that receives a harvested crop and a discharge end through which chaff is expelled from the harvested crop;
• a hollow guiding vane positioned in an interior of the drum, the guiding vane includes an opening that receives the harvested crop therein, wherein one of the drum and the guiding vane is rotatable while the other one of the drum and the guiding vane is stationary to move chaff through the guiding vane to the discharge end and expel grain through the plurality of apertures in the drum;
• and
• a plurality of fingers positioned near an interior surface of the drum, wherein the plurality of fingers pass through the guiding vane when either the drum or the guiding vane rotates.