In my opinion, if you can't feel any play or roughness in the rotation of the bearings, then they are probably good to remain. But that will be better determined when you get them out.
I have been contemplating replacing the seals on a 2140 that are only showing dampness around the ends of the axle tubes. Looks to me like the axle tubes would have to be completely pulled off to get the axles out. Not a joyful time from what I can see, but never did it before, so maybe I'm wrong. Let us know how yours works out.
In case you don't have it, here is a link to the Service Manual. Look to page 5-88 about getting the axles out....
https://www.cubcadetpartsnmore.com/u...01994-1999.pdf