I use a big pry bar and just manhandle the seal out of there. Be sure to inspect the axle shaft just inboard of the flange for pitting, scoring, or other damage. Sometimes there's a wear ring where the axle has been running in the bearing, noticeably smaller diameter than the rest of the shaft. If so, the axle is junk.

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!