MODULAR COMBINE HARVESTER

The present invention is related to a combine harvester comprising a modular grain handling section for threshing and separating grain kernels from a harvested grain crop. The modular grain handling section comprises a transverse stage, a first rotary stage, and a second rotary stage. The transverse stage comprises a rotatable transverse drum and a transverse concave arranged in parallel thereto, the transverse drum and/or the transverse concave being configurable to selectively operate the transverse stage as either a feeding stage or a threshing stage. The first rotary stage comprises a first end of a rotatable longitudinal drum and a first longitudinal concave arranged in parallel thereto, the first end of the longitudinal drum and/or the first longitudinal concave being configurable to selectively operate the first rotary stage as either a threshing stage or a separation stage. The second rotary stage comprises a second end of the longitudinal drum and a second longitudinal concave arranged in parallel thereto, the second end of the longitudinal drum and the second longitudinal concave being configured to operate the second rotary stage as a separation stage.