Drive system for combine harvester processor and method of providing such

A combine harvester comprising:

• an axial flow crop processor with a rotor mounted for rotation inside a rotor housing arranged substantially longitudinally with respect to the harvester;
• a feed beater mounted for rotation on a substantially transverse axis and serving to tangentially impel crop material into the crop processor;
• a multi-speed beater drive system comprising:
• a beater shaft upon which the beater is mounted via bearings to permit relative rotational movement;
• a secondary shaft arranged parallel to the beater shaft;
• a first selectable drive path between the beater shaft and the beater;
• and,
• a second, alternate, selectable drive path between the secondary shaft and the beater;
• and
• a grain cleaning shoe driven via a driveline which includes the secondary shaft;
• wherein both the beater shaft and the secondary shaft are driven simultaneously during operation.