just a word of caution, I don’t know if the Fulcrum freehub is the same as the Campagnolo, but if it is the following may be of help.
They are not designed to be user serviceable, they are, but it is a *****. The problem is as follows. Once you remove the body, you have access to one bearing, the outer one, a drift/screwdriver/etc from the inside should get this out fairly easily,( there is a spacer in the body that can fairly easily be moved out of the way.)
The problem is the inner bearing, if you look you will see a circlip, but it has no way of removing it, no pin holes, no wedge ends. They may have changed the design, it may be different, but just be aware before you try and hit the crap out of the inner bearing and wonder why it won’t come out.
To get it out, google is your friend, but be prepared for it to take a while.