[peters23]

Some tips on axle bearing and retaining collar removal: A die grinder with a 2" or so cutoff wheel makes quick work of this.
You do need to exercise care that you do not cut into the axle or other parts that you will want to reuse.

Start by cutting through the outer bearing shell on opposite sides, than do the ball retainer.
Then you have better access to the the retainer collar and inner race.
You can make these cuts at a slight angle as needed.
You do not need to cut all of the way through, try for around 90% then use a cold chisel to split the parts.

Note that the oil baffle/shield/deflector plates shown in my first post seem to have been used from 37-58, per the MPC. I would expect that newer bearing seals have improved since then.

The pic shows what are likely original 57 bearing (New Departure RW508) and new Fabcraft (MTP SE88508) bearing.