| 摘要 |
PROBLEM TO BE SOLVED: To enable stable power steering operation by reducing suction of air mixed in a main pipe into a hydraulic pump for a power steering in a working vehicle. SOLUTION: This hydraulic system is provided with a hydraulic pump 23 for elevating/lowering a working machine and the hydraulic pump 22 for the power steering, and is constituted so that oil from an oil tank may be supplied to the hydraulic pump 23 for elevating/lowering the working machine and the hydraulic pump 22 for the power steering through the main pipe 25. A suction port 26a (first branch pipe) which guides oil to the hydraulic pump 23 for elevating/lowering the working machine from the suction port 26a provided at the main pipe 25, and a second branch pipe 27 which is inserted so as to be positioned at a lower portion of the main pipe 25, and guides the oil to the hydraulic pump 22 for the power steering are provided, thus flowing oil in which few air bubbles are mixed in the second branch pipe 27. COPYRIGHT: (C)2006,JPO&NCIPI
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