CHOPPER ARRANGEMENT FOR AN AGRICULTURAL HARVESTER

The invention provides a chopper arrangement for an agricultural harvester, having a housing and a plurality of rotatable knife rows in the housing The rotatable knife rows are rotatable about an axis to move crop material in the housing along a crop flow path. The chopper arrangement includes a counter knife arrangement including a first counter knife bank and a second counter knife bank downstream of the first counter knife bank according to the crop flow path. The counter knife arrangement is movable between an engaged position, in which the first and second counter knife banks at least partially overlap the plurality of rotatable knife rows, and a disengaged position, in which the first and second counter knife banks are retracted away from the plurality of rotatable knife rows. The counter knife arrangement also includes a mechanical linkage coupling the first counter knife bank to the second counter knife bank to provide for simultaneous movement of the first and second counter knife banks upon actuation of the counter knife arrangement between the engaged and disengaged positions.