Hydraulic system with at least one driving machine

摘要

The system has return terminals (10,11) that are connected to a drive machine (21) such as drive pump by pressure lines. A valve (19) is provided for adjusting the operating state of the hydraulic cylindrical working machines (4). The return terminals are connected to the working machines corresponding to the operating states of the working machines. The return terminals are connected directly or through a bypass unit (17) for bypassing the operation of the drive pump, so that the hydraulic fluid is passed from one working machine for actuating other working machine.