Evening Benk, no I'm not about to scan in yet another page from the manual (unless you want it of course) just to say that the front wheel bearings are not bad to do but as with everything on PBs they are generally bigger than your average motor. The fact that they are tapered rollers means they usually come out quite easily and as long as they haven't collapsed completely driving out the outer races shouldn't present too many problems. When fitting the new bearings and seals make sure that the outer races have been driven home properly so there is no chance they can move after assembly. There are tightening torques quoted by the manufacturer but I have always relied on getting the right 'feel' when adjusting this kind of assembly, tighten the castle nut up quite firmly and turn the wheel a couple of times then back the nut off again until a little bit of play is felt then nip up again until the play has gone. Go for a gentle run for a couple of miles and re-check for any play and adjust as before. Being the nervous type I would stop and check for any hot bearings periodically until I was convinced all was well. Remember to thoroughly clean the hub and stub axle and don't over pack the bearings with grease, this in itself can lead to them overheating. Apologies for the ramble (I appear to be doing it regularly) and hope this will be of help. If you want any more info please let me know and I will try and oblige.
, so i have the joy of a trip to speedy spares early tomrrow morning and then a sunday of fun doing both sides to be safe