when truck stops at crane position, electrostatic equipment and anti over flow sensor are correctly setup. Input password, then preset oilvolin panel. (the oilVolalso can be set in office computer), after the signalof anti over flow sensor and electrostatic equipment are detected. Oildelivery begin. push the EMS key to stop delivery when something urgent happens. when it is almost to the set vol, system willclose the electrohydraulic value step by step. tillthe delivery is finished.