Need help with vintage/antique J G Wilson Door

Need help with vintage/antique (depending on your age lol) J G Wilson Door from the 1930's - 1950's. The door is a solid hardwood sectional vertical lift to horizontal rails door. It uses a torsion bar and or springs that must be inside the 4" solid tube. On the left side is a single disc with a cross pattern that seems to act as a locking mechanism with a an "L" shaped pin. Towards the right side, is a bolt that goes through the whole tube.

Some years ago the brackets rusted out, the cables broke, and someone removed the pin from the single disc. We replaced the bottom brackets and installed the cables. I'm trying to figure out how to torque the bar and how many turns are necessary in order to lift the door. The springs may be broken but I don't think so. In our attempts to understand it, we inserted the pin in the side disc, locking it down and using the 4 winding holes on the left side, we were able to wind it about 20 quarter turns, attached the cables and the door lifted slightly about 3 inches. So we then reversed the process, and with the pin out of the side disc. The side disc moves freely along with the whole tube and everything inside.

We have another smaller door exactly the same that is completely functional. As the door moves up and down the side disc. which has the pin in place does not move.

I have been unable to locate any kind of information on this system, images, nor even a mention anywhere of this.

I've attached photos in hopes that someone could help with more information. It seems I could only attach 2 but I have plenty more.

Thanks in advance.