| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent lowering of a slewing speed by prioritizing supply of hydraulic oil to a hydraulic motor for slewing if the slewing independence is to be assured, and to improve workability and operability of an actuator that is operated by prioritizing supply of hydraulic oil to the actuator when operation other than slewing is to be prioritized, in a combined control including slewing. SOLUTION: When left and right traveling motors 9L and 9R are not driven, a first regulator device 48 controls first and second pumps 22 and 23 according to the respective discharge pressure P1 to P3 of first to third pumps 22 to 24, whereas a second regulator device 49 controls the third pump 24 according to the discharge pressure P3 of the third pump 24. When the left and right traveling motors 9L and 9R are driven, the first regulator device 48 controls the first and the second pumps 22 and 23 according to the discharge pressures P1 and P2 of the first and the second pumps 22 and 23, whereas the second regulator device 49 controls the third pump 24 according to the respective discharge pressures P1 and P3 of the first to third pumps 22 to 24.</p> |
