| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit for a construction machine capable of preventing reduction in pressure of a pressure oil to be supplied to a direction control valve in the hydraulic circuit comprising a direct traveling valve.SOLUTION: A hydraulic circuit for a construction machine comprising a direct traveling valve comprises a first oil passage for supplying a pressure oil discharged from a hydraulic pump to the direct traveling valve, a second oil passage for supplying the pressure oil supplied to the direct traveling valve to a direction control valve, a third oil passage for bypassing the first oil passage and the second oil passage, and a switching valve disposed in the third oil passage. The switching valve leads the pressure oil supplied to the first oil passage into the second oil passage when the switching valve is open. |
