The tricky part is pressing the outer and inner race at the same time. The outer race goes inside the housing and the inner race goes over the shaft. So both races need to be pressed in with equal pressure on both, so the ball bearings don't get jammed into the races and make impressions and screw up the bearing. That's how we messed up. But if you work at a machine shop, this will be a no brainer for ya then. You'll get it there and go, "Oh.... This is easy" It's pretty straight forward. You'll do fine. To check how you did, spin it a bit very slowly (before you install the seals) and it should be super smooth, with no bumps, or hang ups.
