Given the relatively inexpensie price of a new unit, repairing the old one is not a good deal, unless it is still under warranty. By the time the seal and bushing have failed, the internal body is usually worn out also.: Could you please tell me how to remove the : grinding ring from the above to replace the : bushing & seals or at least confirm it is not worth saving?? : Or is there an address for an online manual I could look at?? : Thank you in advance.