The only way i can get the seals out of my axle is to split the ring with a chisel.once you split it, grab it with pliers and pull it out.i tried with a slide hammer and other ways.if you burr the seat, just file it down and youre good.this is just what has worked for me.it sucks to tear it down twice, or in my case, 4 times in the past 2months.i like to learn thd hard way i guess