| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control device of a working machine which can avoid the lowering of work efficiency caused by oil amount shortage when operating a working implement and a working front on one side, in a working machine having two working fronts.SOLUTION: A hydraulic control device of a working machine comprises: an actuator A142a being one of actuators constituting a right actuator group 101A; an actuator B142b being one of actuators constituting a left actuator group 101B; a communication pipe conduit 36 for connecting the actuators; and communication pipe conduit switching means 90 to 92 which are arranged at the communication pipe conduit, and switch a first state that oil pressure from control valves A, B is supplied to the respective actuators A,B, a second state that the oil pressure from the control valves A, B is supplied only to the actuator A, and a third state that the oil pressure from the control valves A, B is supplied only to the actuator B. |
