- (agriculture) The part of a harvester or combine which both sieves out large impurities such as rocks and blows out light impurities such as chaff
2003, William W. Casady, “Grain Harvesting Systems”, in Dennis R. Heldman, editor, Encyclopedia of Agricultural, Food, and Biological Engineering, pages 449:
- The cleaning shoe expels lightweight material known as chaff as well as material with intermediate aerodynamic properties, such as straw, from the back of the combine.
- (rail transport, machinery) A brake shoe used to clean a wheel
1913, Pennsylvania Railroad Test Dept., Brake Tests, pages 245:
- After every test (except those at 30 mph) the wheel was cleaned by making two stops with cleaning shoes from a speed of 40 miles per hour.
part of a combine
brake shoe used for cleaning