Hi Andy,
Yes I realise you have to replace the hub assembly - I suppose the question I'm asking (Which I didn't express well) is what are peoples experiences of this issue, do O rings fail often, or is it always the bearing/hub seal?
If i'm going to take the hub off to get at the O ring, is it worth while replacing the Hub as a matter of course, as to rent or borrow the over sized torque wrench has to be a factor in undertaking the job?
What do you guy think - I'm still trying to track down a picture guide for the procedure - I have Disco 1 wheel bearing links coming out of my ears, some good Disco II front guides, but I have been unable to find a picture guide for th rear - any links would be very welcome