| 摘要 |
The system (10) includes a source of pressurized fluid which has a load sensing hydraulic pump (11) that receives fluid from a tank (12) and delivers the pressurized fluid to a priority circuit (13), secondary (14) and an implement circuit (16). The priority circuit is a power steering circuit and includes a flow control steering valve (17) which has a supply port (18), a tank port (19) and a load sense signal port (21) that communicates with the tank port at a neutral position. A pilot operated on/off valve (37) is disposed within a signal line (34) and has an open position permitting fluid flow through the signal line and an off position blocking fluid flow. The secondary circuit is a hydraulic brake system including a load sense pressure reducing brake valve (39) having an inlet port (41) connected to the supply conduit (24) upstream of the priority valve (23) and a load signal control port (42) connected to an end of the on/off valve.
|
