A harvesting machine with a discharge assembly for the transfer of harvested crop to a transport vehicle includes an actuator that is adapted to move the discharge assembly about a horizontal axis, thereby adjusting the height of the outlet end of the discharge assembly. A stop element can be moved between an active position and an inactive position. In the active position, the stop element limits the range of movement of the actuator such that the discharge assembly cannot be moved to a position that is lower than a lowest active position. In the inactive position, the stop element does not limit the range of movement of the actuator, thus the discharge assembly can be moved to a position that is lower than the lowest active position. Therefore, the discharge assembly remains above the lowest active position during the harvesting operation.