A control arm linkage system includes a pair of upper control arms and a pairoflower control arms to attach a crop harvesting header to a harvester frame ofanagricultural harvester. The attachment of the header to the harvester via thecontrolarm linkage system allows the header to move relative the harvester, with theheader being displaced upward and heeled backwards in response to an upwardforce being imparted onto a lower surface of the header. The control aimlinkagesystem thus allows the header to automatically adjust and adapt to unexpectedraised mound that may be encountered along the path of the header duringharvesting.
