I would never trust 2 drivers trying to do what is being described. I'm sure it can be done...But there are a lot of variables which can turn to a disaster. Everything from drivers to equipment.
This sort of thing is usually done with 2 operators but I don't see any reason I couldn't operate both mast tilt and up/down levers by myself. In other words, I use the Hyster and chain to drag the radial drill to edge of trailer (assuming the timbers it sits on are the same width as the trailer or slide with it), disconnect chain, drive Hyster forks under heavy end of radial (i.e. where the column is and specify in advance the seller positions head near column for shipping), insert plywood anti slip strips on forks. Then I get the Daewoo 5K lift and drive it under the lighter side, install plywood on forks. Emergency brakes on both, I straddle both trucks (which is easy from a reach both controls standpoint but a little tricky from a stand/semi squat between trucks standpoint) , left hand operates Hyster controls, right hand operates Daewoo controls.
Both forklifts have excellent short "direct lever to valve" controls for super sensitive action (unlike some forklifts with comparatively "sloppy" action that have long levers connected indirectly to the valves)
I raise the machine 1/2" of definite clearance from trailer, with both lifts at once... I check out how light the rear each lift seems via rear wheel turning, if ok I hop on trailer and I attempt to shake the drill to see how solid it feels on the four forks. If all ok, I tell driver to pull out, I lower it to the awaiting skates or timbers. Pull out both forklifts and the rest is obvious.
Forgot to mention dkmc has flown down from the cornfields to film all this with my iPhone 6S, ready to press 911 on his Nokia flip phone. YouTube title "How to NOT unload a radial drill" ready for viral upload.
But now, just as I have your excitement at a fever pitch....damn if the radial in question has not been SOLD to someone else !! (the cute part being if was for sale for
two years and just now got sold......even if not, it would probably be 3 weeks before this would happen.
