Since the donor wheel is being replaced, specialized tools are unfortunately likely required.
The second option would be to only replace the sealing ring, but it's likely that the bearing ring will also be damaged. It would require a trial to see.
I would borrow the tool from the upon providing appropriate collateral.
LG, Onkel BM
*Nichts ist einfacher, als sich schwierig auszudrĂźcken......*
**Technische Fragen bitte ins Forum und nicht in mein Postfach**