| 摘要 |
The hydraulic directional valve (10) has a pump port (P), tank port (T) and one and another working ports (A,B), where the working ports are connected with a hydraulic cylinder (30) of a lifting unit of a mobile work machine, particularly an agricultural vehicle. The pump port is connectable with a hydraulic pump (40), where the pump port, the tank port and the working ports are blocked in one switching position (11). The pump port and former working port are blocked and the tank port is connected with latter working port in fifth switching position (15). |
