1: refueling / replacement of hydraulic oil.
2: the jack is placed in a vertical state, the pump core, the piston to the lowest point.
3: take off the rubber oil plug on the jacket, and inject the hydraulic oil into the piston port.
4: use 5-45 degrees Celsius temperature range to zero in on the selection of N15 mechanical oil GB443-84, such as 5-29 below zero degrees Celsius temperature range is changed with synthetic spindle oil (GB442-64).
5: regular inspection, lubrication transmission connecting rod, if not in use, the piston rod adjustment screw and pump core should be pressed down to keep clean, rust.
6: as far as possible to avoid it in a humid environment or a place with acid and alkali and corrosive gas.