@Jerb322 There used to be a website called "wheelpost.com" that had a lot of older S&G manuals. Seems you may be able to still access it via Archive.com:
https://web.archive.org/web/20191112002128/http://www.wheelpost.com/
Might be able to find parts manual and instructions there. Patent number in your picture may also help:
https://patents.google.com/patent/US2575674A/en
Looks like some funπβ
@pezhore @ilovecheese Might want to post some images, showing the problem and/or the Name+Model for the lock in question.
There are quite a few different size tubular locks and not all of them can be tensioned in the same way.
If you know the name/model... you could also try searching youtube with it and see if anyone else has opened it and what they usedπβ