Systems for regulating the flow of material other than grain through common concaves while simultaneously equalizing the flow of grain through common concaves

A concave system for a combine harvester, comprising:

• a concave configured to be placed within the combine harvester around a rotor positioned within the combine harvester;
• a cover plate or MOG limiter;
• an over-center latch assembly for attaching the cover plate or MOG limiter to an outer surface of the concave, the over-center latch assembly comprising:
• a base plate including a pair of ears protruding therefrom, the base plate attached directly to the cover plate or MOG limiter;
• a handle in rotational communication with the pair of ears;
• a lever operatively connected to the base plate via a center pin in rotational communication with the handle that allows the lever to rotate with respect to the handle;
• and
• a loop at a distal end of the lever that is configured to attach to a catch at an end of the concave;
• and
• a wire lock clevis pin positioned between a center rail of the concave and a rail of the cover plate or MOG limiter to assist with securing the cover plate or MOG limiter to the concave;
• wherein the over-center latch assembly secures the cover plate or MOG limiter to the outer surface of the concave.