| 摘要 |
<p>PURPOSE:To provide a hydraulic control circuit which can quicken the operation speed of an attachment work machine when the attachment work machine is operated along and can set a work machine in motion surely together with the attachment work machine when the work machine is operated simultaneously. CONSTITUTION:The discharge lines of first and second pumps 11, 13 are connected to each other by means of a confluence line 301, and at the same time confluence valves to join the discharge oils of the first and second pumps and run it to an attachment work machine at the time of the attachment work machine being operated alone, and to run the discharge oil of the second pump 13 alone to a work machine at the time of the work machine being operated alone, and to run the discharge oil of the first pump 11 to the attachment work machine and at the same time run the discharge oil of the second pump 13 to the work machine at the time of the attachment work machine and the work machine being operated simultaneously, are provided at the confluence line 301.</p> |
