| 摘要 |
PURPOSE:To simplify constitution by providing a passage selecting means in a communication path which connects a delivery direction-selectable fluid pressure pump to a propulsion machine up-down turning cylinder device. CONSTITUTION:When a manual lever 50 is placed in a low speed position suited for trim adjustment, a delivery direction-selectable fluid pressure pump 24 allows its delivery fluid to flow into a cylinder device 13 from a delivery port 26A or 26B through a check valve 33 or 34 in an opening and closing device 28 and through a pipe line 30 or 31, performing trim up or trim down. On the contrary, when the manual lever 50 is selected to a high speed side, the upper chamber side pipe line 30 is cut off, and the upper chamber side pipe line 30 of the cylinder 13 communicates with a bypass pipe line 49. A pressure of fluid from the tilt up side delivery port 26B of the fluid pressure pump 24 acts on both upper and lower chambers 19, 20 of the cylinder device 13 extended by a differential pressure receiving area of a piston performing tilt up. Thus, a structure can be simplified. |
