control system for operating a machine (1), where the harvester (1) of a tractor (2) and at least two (2) coupled to the tractor units (3, 4, 5) in at least one fortbewegungsrichtung, namely in the harvester (1) rear unit (3),4) and at least one in fortbewegungsrichtung the harvester (1) front unit (5), with one of the or each rear unit (3, 4) which hydrauliksteuereinheit (6)the a to a hydraulic system (9) of the tr u00e4gerfahrzeugs (2) dockable hydraulikblock (7) and an electronic control unit (8), and which the legislation of a entlastungsdrucks for the or each rear unit (3, 4) is used, and with the or each rear unit (3),4) assigned hydrauliksteuereinheit (6) of the rules of entlastungsdrucks for the or each front unit (5) is used.
