So, kind of paraphrasing what's been said:
If a brake wheel was lowered, it was raised the first time someone needed to use it. And it stayed that way until there was a reason to lower it.
The implication here is that ya can't use the brake wheel in a lowered position. Is that true? I don't see how it could be, because what d'ya do if you need to park a flat with a long load?