I have a rockwell/Delta 8" jointer with the standard dovetail ways. I can not figure out how to remove the tables. I cranked it all the way to the end both up and down. Up travel hits the bearing before the dovetails are close to being free.
All the info I found was for lever type jointers not screw adjust.
It has a single gib so removing it will not let it lift off.
Down travel goes until it hits the handle support boss. The only way I can see to do it is to unbolt the handle support boss from underneath. But there is some sheet metal in the way so a socket extension will not work. It would be very awkward to do it with no extension. I can not see any bolts holding the main base down to the base cabinet or I would flip it upside down and grind clearance for a wrench.
Bill D
JA 127 IN THE ATTACHED DIAGRAM
http://vintagemachinery.org/pubs/1141/492.pdf