Remember, put the bearing back in the hub BEFORE you put the seal in place. I guess I was 50 - 50 on that account.
Just remove your old seal, use a long punch to tap it out from the top side if you you don't have a 'seal puller' (I don't have one)
Make SURE you put the bearing back in the hub when it falls out, and before you drive the seal in place.
Mr Great Uncle was a heavy proponent of using Permatex on the outside of axle seals to seal them again water there as well. So I applied Permatex Form A Gasket #2, the non hardening kind, to the outside edge of the seal before I installed it.
What I wanted to point out with the picture is that these seals are wider or thicker than my old ones, and when they are driven into the hub, they stick up slightly compared to the old seals.
That turns out to NOT be a problem, because the ring is wide enough to support them.