| 摘要 |
A variable output pump control circuit using a remote control valve for switching two control valves which control the operation of hydraulic actuators and control the switching of the servo motor of a variable output pump by means of pilot pressure from the remote control valve. A control circuit is provided in the pilot circuit of the variable output pump for controlling switching by means of the pilot pressure from the remote control valve. Thus, insufficient hydraulic pressure in the pilot circuit, which occurs when the flow rate in the remote control valve is small, is eliminated.
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