Here are two spare Enots taps that I just took apart. There's not much to know really.
On assembly the top and bottom fittings are obvious and the wording PUSH ON and PUSH OFF should be the right way up. The bottom fitting has a convex end for the petrol pipe nipple to sit in. The hex end of the tap slider is the PUSH ON end which is easy to remember (hexagON!!)
You can see the remains of the old corks I just dug out and the new corks ready to be boiled and oiled to make them soft and supple. Don't overtighten the fittings as you can crack/split the central part.