| 摘要 |
PURPOSE:To improve both the operational reliability of a check valve and the mountable property of the valve. CONSTITUTION:In the release valves 36 and 43 of a trim tilt device mounted between a gear pump 34 and a tilt cylinder, and a trim cylinder and having check valves 38 and 44, and controlling the flow of working oil fed from the pump, the check valve has a valve body 77 which is caused to open and close a valve port and slidably disposed in a valve case 76 wherein a valve port 79 is formed. The end part of a valve spring 80 to exert an energizing force on the valve body 77 is supported on a valve case by means of a spring support 81. |
