Hydraulic system

The hydraulic system has a pump (10) with constant delivery volume which supplies pressure medium to at least two hydraulic motors (13, 21, 23) connected in parallel. A flow control valve (24 to 26) is connected upstream of each hydraulic motor. Each consumer line has a pressure tapping point (P1 to P3) via which the load pressures of the individual consumers are directed via shuttle valves (29 and 35) to a pressure-relief valve (18), this pressure together with the force of a spring acting on its closing member in the closing direction. During operation, the opening pressure of the pressure-relief valve (18) in each case corresponds to the maximum load pressure at a consumer plus the differential pressure between pump and consumer. The pump (10) is designed in such a way that its delivery volume is greater than the sum of the volumetric flows which can be set at the flow control valves. Depending on the type of loading, the excess volumetric flow is discharged in a controlled manner to the tank via the pressure-relief valve (16) or via the pressure valve (18). In this way, an energy-saving hydraulic system working without problem is obtained.