| 摘要 |
<p>One or more directional seat valves (31,33,35,37,39,41,43) have at least two control positions and are connected by pipes for the hydraulic medium and to a number of controlled connections (A-D,L,R). The directional seat valves are operated by a control (29). The control for each seating valve comprises a cam plate (47,49,51,53,55,57,59) positioned on a shaft (45) turned by a gear (61) preferably a gear-change mechanism. A cog wheel (63) rotated by a movable adjustment (65) is positioned on the shaft.</p> |
