| 摘要 |
<P>PROBLEM TO BE SOLVED: To supply a sufficient amount of pressure oil to a lift control valve for a lift cylinder for lifting a work machine and prevent the capacity and configuration of an external hydraulic pressure takeout valve from being changed even if the amount of the pressure oil required for the normal operation of the lift control valve is changed by changing the lift control valve to an other type of lift control valve. Ž<P>SOLUTION: This hydraulic device of a work vehicle includes the lift control valve 26 for the lift cylinder 13 for lifting the work machine, the external hydraulic pressure takeout valve 23 capable of taking out a hydraulic oil for the external hydraulic device, and a hydraulic pump for supplying the pressure oil to the lift control valve 26 and the external hydraulic pressure takeout valve 23. A flow dividing valve 27 for dividing the pressure oil from the hydraulic pump into a lift control valve 26 side and the external hydraulic pressure takeout valve 23 side is installed in the pressure oil path extending from the hydraulic pump to the external hydraulic oil takeout valve 23. The pressure oil supplied to the external hydraulic oil takeout valve 23 by the flow dividing valve 27 is converged again to the pressure oil divided to the lift control valve 26 side, and supplied to the lift control valve 26. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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