While reloading last weekend I suddenly realized that it had been awhile since I'd performed any real maintenance on my RCBS presses. For the best part of the last two years they've been sitting in a cardboard box out in the garage (since moving from the Seattle area to Florida). I finally got my reloading room put together (after getting rid of a lot of clutter) and mounted the presses to a new reloading bench I'd just finished building.
In short, I "field stripped" my presses, wiped 'em down with a little bit of oil, applied grease to pivit pins, oiled other pivot points, a light coat of oil on the shaft, etc., and reassembled them. They feel and operate like new.
One is an ancient RCBS Reloader Special 2 that I got from my father for a birthday present about 30 years ago. The other is an RCBS Pro-2000 I bought about 10 years ago.