Mobile harvesting unit

A mobile graff harvesting unit including a wheeled harvester body and a harvesting header at the front of the harvester body, the harvester body containing a threshing unit adapted for separating stalks in a cut crop from graff, a mixture including grain, chaff and weed seeds, a discharge, and a storage tank, whereby a crop cut by said harvesting header from a field area is threshed by said threshing unit to separate said stalks from said graff, said graff is collected within said storage tank and said stalks are returned to said field area via said discharge, said harvesting unit including an elongated hitching arm having opposite lateral ends, said hitching arm being connected at one of said ends to the harvester body and having means at said other of said ends adapted for attachment to a rear portion of a propulsion device provided with a power take off shaft, the hitching arm having a raised section intermediate said opposite ends passing over and clear of said harvesting header;

• wherein said hitching arm carries and guides a driveline for transferring power from said power take off shaft of said propulsion device to the harvesting unit, said driveline comprising at least one rotatable shaft adapted for connection to said power take off shaft.