I haven't had to use the sleeve, but it is an option when the seal surface is worn.
I did have to redo the seal once. Put in a new seal, it leaked. Took it out and looked at the seal, it was made wrong! Looked like when it was assembled the rubber part was not centered in the steel part. Never seen that before or sense. But might look at your's, no telling how many were made that way before it was caught.
If your shaft has a groove worn where the seal runs, a common trick is to not drive the seal as far in so it runs on a fresh surface. Or sleeve it.