The front spindle and bearings are a press fit into the eccentric. I pulled the eccentric then used an arbor press at a friends shop to remove the original spindle that I had bent by standing on the pedals going up a grade. I haven't yet removed the rear unit but it has e clips or snap rings and epoxy to help hold it in. from what has been discussed the spindle + bearings and sleeve in the middle come out together than an arbor press could be used for disassembly and reassembly.
Here is a similar tool to the on I
used . You would need to confirm that the tool had enough range.