Check both axles for a wear groove where they ride on the bearings. A failed seal is quite often the result of axle and/or bearing wear that lets the axle bounce up and down on the seal as the wheel hits bumps in the road.
Jerry

"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!