Porter Ferguson body and fender service equipment

[36coupe]

I salvaged this porter, Ferguson body and fender service kit years ago from an old Ford dealership that closed down. I suspect I’m missing the hydraulic pump and hydraulic ram.
I’m pretty sure with the wealth of knowledge on this site I can figure out how to use this and what I am missing.
The box that it came in is heavy duty and was a pile of rust when I got it. I gave it a quick sanding and sprayed it with some leftover red paint I had.
I can’t quite picture how to turn buckle and lower piece would work.