[SSSammy]

The black plate is the bearing retainer. Just to be clear, you should not file the outside circumference of it at all. Check and see if it is the 4 bolt heads that hold the bearing retainer on that are interfering. The spacer has some small reliefs cut out to provide clearance for those bolts. But maybe something is out of tolerance. Those reliefs can be enlarged, but best to do it at a machine shop.

If it is just some casting irregularities on the face of the bearing retainer, it should be ok file them down.

Sam