Thanks Grumpy,
I went ahead and pulled it apart anyway. The reason why i had to go so far was the bearings were seized onto the shaft. So after i had separated everything i used a press to get them off. Not good because they are just supposed to slip on and be held in place by the retainers and the sleeve with the grub screw in it aren't they? Well i have cleaned everything up now and de-scaled and painted relevant bits.
Thanks for the reply.
