Hi I ve also got 96 beta. Once the nut is off the spindle should tap out (how ever I would suggest that for the initial taps to leave the nut slighty wound down to prevent damage to the threads and try to turn the allen head on the other side as you tap).The spindle is aluminium so you have to be very carefull and I guess that the lack of maintenance isnt going to help. It is probably seized a) in the housing and to the needle bearings. I would also suggest downloading a parts catalogue for beta (there is a download somewhere on previous threads but for now I cant remember where) Good luck