Hoover W/M bearings

Hi, I have a Hoover HNL6166 with bearing failure. The querie I have is that I didnt think you could replace the bearings in these tubs, I understood that they were cast in the tub and that you would more than likely crack it by trying to replace them but there is a part number for just the bearing kit which has now left me confused as to whether you can or cant do it!

So Two questions really, if it is possible then do you know the part number + price for the bearing kit? and advise on the process would be MUCH appreciated! Or if it cant do you know the part number + price for the tub complete with the bearings and seal?

Thanks for your help
Darren