turn handle counterclockwise one full turn open. pump handle eight full strokes. turn handle clockwise to close valve. pump handle until the lift arm reaches maximum height and continue to pump several times to remove trapped air in the ram. turn handle counterclockwise one full turn and lower arm to the lowest position. use force if necessary. turn handle clockwise to closed position and check for pump action. it may be necessary to perform the above more than once to assure air is evacuated totally.