| 摘要 |
<p>Hydraulic shovel, in which, when optional functions are to be added by using an optional valve of a hydraulic shovel, ease of operation as an automatic system is improved without impairing its light weight and compactness; comprising an auxiliary spool working means having a hydraulic cylinder means (24) and provided between a spool working means and a valve unit (18), and a selector valve (14) for blade disposed on the path of oil supplied from a hydraulic pump via an auxiliary valve (19) while the auxiliary spool working means is connected to the auxiliary valve (19), wherein the tilt-angle operation of a blade (10) can be carried out by selecting, by switching operation of a control lever (L), between pressure oil supply to hydraulic cylinders (11L, 11R) for angle of the blade (10) and that to a hydraulic cylinder (12) for tilting.</p> |
