A forage harvester includes a post-accelerator disposed in an interior of the forage harvester, which post-accelerator includes a conveying fan that rotates about a rotary axle. The post-accelerator is partially enclosed by a housing that is open in sections and that extends in sections into a crop-conveyance path. An extent of the extension into the crop-conveying path is adjusted by displacing the post-accelerator relative to the housing. The forage harvester also includes a wall disposed opposite an open section. The rotary axle includes ends that are mounted in bearing supports disposed on the housing via one end to be pivotable about a pivot axle. Each of the bearing supports are connected to an actuator at a free end opposing the one end disposed on the housing.