ARRANGEMENT FOR OPERATING A LOAD-CONTROLLED HYDRAULIC SYSTEM OF AN AGRICULTURAL TRACTOR

An arrangement for operating a load-controlled hydraulic system of an agricultural tractor, includes a hydraulic pump generating a system pressure and having an actuating device to adjust a displacement volume, a hydrostatic vehicle steering system connected to the hydraulic pump and having a steering orbitrol and a first load-indicating pressure, a pressure-regulating valve connected upstream of the steering orbitrol and actuated via a pressure difference decreasing across a throttle element counter to a predetermined restoring force in accordance with the first load-indicating pressure, a second hydraulic consumer connected to the hydraulic pump and feeding a second load-indicating pressure back to a shuttle valve arrangement, which compares and transmits the respectively higher of the first and second load-indicating pressures to the actuating device to adjust the displacement volume, and a pressure-copying valve indirectly feeding back the first load-indicating pressure to the shuttle valve arrangement.