... 5MPa. The systerm adopted bear pump,the rising and falling of oil tank is controlled by the ... of executing agency(rising and falling of oil tank),by hydraulic control single valve carrying ... working media is 46# anti-mill hydraulic oil,filled oil must be chear,no-impurities.Before turning ... by falling button and display touch key4),SB3: oil pump starting5),SB4: lower roller rotating on the left6 ...