Hydraulic controller for working machine

摘要

There is provided a hydraulic controller for a working machine in which a pilot hydraulic pressure source (33) is connected in common to a plurality of pilot-operated hydraulic devices (18L,18R) each having a pilot pressure input unit (19), and a common pilot pressure input switching valve (78) is adapted to control the switching between a pilot pressure input from the pilot hydraulic pressure source (33) to each pilot pressure input unit and a relief of the input. The switching control of a pilot pressure input by the pilot pressure input switching valve (78) is performed based on the operating state of the working machine and pilot pressure input conditions of the respective pilot-operated hydraulic devices.