I realise that this post is years old, but I am in the same situation, having just purchased a secondhand BB95 grinder.
I've pulled it to bits but am stuck at the same juncture as you.
- I have undone the screws and the burr is removed, but would like to know if its possible to remove the brass bit from below (the parts manual calls is a "fan")
Parts manual is here: http://coffeesnobs.com.au/documentat...s-diagram.html
On the off chance that you receive an alert for this (thread reply), and that you were able to sort it out please let me know, if anybody else knows how to remove the "fan" please feel free to let me know too