Hi James. You will need a large slide hammer puller, one with a foot big enough to catch 3 of the lug bolt studs. If nobody has changed out the rear end housing on your tractor, you will find an outboard seal that seals against the wheel hub (rather than the later version that was inboard of the axle bearing and sealed against the axle itself). There is also the possibility that the bearing is bad, which would ruin the seal, but with the outboard type seal that you should have, the bearing always rides in hydro fluid, so it is unlikely that is is bad (but possible).
Kent
Kent