Medela Symphony Breast Pump Quick Guide After washing hands, remove all components of the Express Pack Make sure that the power cable is connected correctly Make sure the white valve membrane is connected to the valve head. Attach the valve head to the breast shield. Attach the bottle to breast shield and tubing to the back of the breast shield Insert tubing to side of the pump, double pumping can also take place Place breast shield centrally over the nipple On/ Off Change Turn the pump on by pressing the on/off button, vacuum can be adjusted by turning the central dial, you should turn it up till it feels slightly uncomfortable and then turn it down one droplet. The change button should be pressed once milk appears in the breast shield, this will enable the expressing to take place. Health Promotion Team 2012.