| 摘要 |
PROBLEM TO BE SOLVED: To provide an air bubble removal system for a construction machine in which the hydraulic oil of a stable flow rate can be secured and air bubbles can be removed effectively while reducing the number of pressure loss elements to the utmost in a downstream portion of an air bubble removal device even if the construction machine has a closed circuit and a hydraulic circuit in which the flow rate of the hydraulic oil is fluctuated violently.SOLUTION: When viewed from the flow direction of hydraulic oil, a downstream portion (25) of an air bubble removal device (11) on a return oil line is connected directly to a tank (8), and a filter (10) is arranged in an upstream portion of the air bubble removal device. |
