The latest Up-date: Well like I said in my last post, it's going to be working by the end of April. Well it is.
I was digging through a mountain of old spares and came across, what I think was a old pusher motor. It looked like it might do my job! So wired it up on the bench to see the RPM and looked good to me, so off we go: cut a slit in the shaft and drilled a hole (nowhere near centre ha ha), and into the crane; fitted a small bolt through the drive shaft and fixed it down to the base; wired the motor through the Rheostat, stood well back and plugged it in.
It only bloody worked.
Small adjustment on the tilt to correct the early stop, and Hey Presto!
It even sounds like what I think an old 1930s crane should sound like.
Now I'm as happy as a pig in the poo !!
I will post a couple of pics soon.
Still would like to find an original one (motor) if possible,