Pump elements.
Pump elements.
Could someone explain how pump element is working, I don't understand how element is filling up. There are two holes in element, smaller one is for lubrication which is opening to plunger flag and bigger hole is for element filling. Throttle rack is turning plunger and plunger is moving up and down, I looked one element pair in my hand and I don't get it how element is filling up when it moves down. I can see helix through element hole but it does not make sense for me how plunger takes fuel in when moving down but is not letting fuel back when moving up. Some explaining scheme would be great.