| 摘要 |
PROBLEM TO BE SOLVED: To make a single hydraulic pump suffice for a hydraulic device of an industrial vehicle, without installing a pilot pressure generation pump for supplying pilot pressure, which includes a steering-priority priority valve, and uses a pilot changeover control valve.SOLUTION: A hydraulic device of an industrial vehicle comprises: a steering-priority priority valve 23 which is supplied with pressure oil discharged from a variable capacity type hydraulic pump 22 driven by a prime motor 21; a lift control valve 25 which controls a flow of pressure oil discharged from the priority valve to a lift cylinder 11 and a tilt cylinder 12; and a tilt control valve 26. A sequence valve 29 is arranged at piping K1 which supplies the pressure oil discharged from the priority valve 23 to the lift control valve 25 or the like, pilot circuit piping K2 is branched from between the sequence valve 29 of the piping K1 and the priority valve 23, and a pressure reduction valve 30 is arranged at the pilot circuit piping K2. |
