HYDRAULIC APPARATUS |
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| 申请号 | EP16814120 | 申请日 | 2016-06-02 | 公开(公告)号 | EP3315791A4 | 公开(公告)日 | 2018-06-27 |
| 申请人 | YANMAR CO LTD; | 发明人 | SAKAMOTO KUNIHIKO; | ||||
| 摘要 | An object is to prevent a decrease in an operating speed of an external hydraulic work machine when actuation and turning operation of the external hydraulic work machine are performed at the same time. A hydraulic apparatus for a hydraulic work vehicle capable of supplying pressure oil to any of a bucket cylinder (20), an arm cylinder (21), a boom cylinder (22), a swing cylinder (25), a blade cylinder (13), a turning hydraulic motor (62), a left traveling hydraulic motor (63), a right traveling hydraulic motor (64), and a PTO hydraulic motor (65) by a first hydraulic pump (PI), a second hydraulic pump (P2), or a third hydraulic pump (P3) is configured in such a manner that pressure oil can be branched off from a discharge oil passage (28) of the third hydraulic pump (P3) and supplied through an external pipe (71) to a downstream side of a load check valve (46) disposed on an oil passage communicating with a pump port (36p) of a PTO control valve (36) for switching supply of pressure oil from the second hydraulic pump (P2) to an external hydraulic work machine (16). | ||||||
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