A pull-type crop harvesting machine (10) has a header carried on a frame mounted on ground wheels with a hitch arm (19) extending from the frame over the header to a hitch connector of a tractor. The hitch arm (19) is mounted for pivotal movement about a generally upright axis such that in a first position the tractor tows the frame in echelon to one side and in a second position the tractor tows the frame in echelon. There is provided connecting assembly (23) for connecting the forward end of the hitch arm (19) to a hitch connector of the tractor and a mechanical connection from the PTO of the tractor to a pump for hydraulically driving the cutting assembly. The connecting assembly (23) provides three axes of pivotal movement for up and down, tilting and side to side movement of the header relative to the tractor. These axes are defined by pivot couplings which are stacked so that the forward end of the hitch arm extends over the connecting assembly and the pump so that the mechanical connection to the pump passes underneath forward end of the hitch arm (19).
