On a steel shaft, easiest way is a large bench vise, and a 3 lb hammer. On the rear joint, remove the 2 loose caps, and place the cross across the jkaws of the vise. Then srike the yoke just ahead of where it is welded to the tube hard, several times. The "top" cap will be pushed up and out of the yoke. Flip it over so the other captured cap is now on "top", and repeat procedure.
To install, use the vise jaws like a manual press to squeeze the caps in one at a time. I like to put a small swipe of grease on the needles so they don't fall out so easy.