No. Just lean the bike toward the opposite side.
Take a small pointy screwdriver and pierce it into the old seal just inside the outer metal frame of the seal. It is L shaped under that rubber coating. Then pry it out without scraping the case. No tools should touch the case or the shaft. Some prefer to put a screw into the seal's L frame to pull it out. But, I never found the need for that.
The new one must not get nicked by the splines on the shaft upon installation, so either thin tape it, or be very careful sliding it in place.
If a prior mech buggared the shaft where the lip rides or the case pocket, it will probably still leak with the new seal.
Cheers,