Techniques: Electric pump: 220VAC Delivery: 10-20L/min Trolley: (art. 200-T), 180-220KG Flow meter: (art.37820) Firstly, put the pump into the drum, when it is power on, aim the outlet at where need oil, press the reset button, then turn on the ball valve and the oil gun handle, it can work now. When it is working, you can look at the figures of the flow meter. If it is what you want, you can unclench the handle now. At last, don¡¯t forget to turn off the ball valve