These parts will convert an Athearn switcher AAR sideframe from friction bearing to roller bearing.
To install:
- First drill a 5/64" hole from the back of each bearing using the axle dimple as a guide (optional, but makes next steps a bit easier).
- Chisel off the remainder of the journal box flush with the main sideframe face.
- Glue the bearing part in place with the extension bit oriented up.