I have a feeling this may be a typo either for "Sch*R*ottraum", or for "Sch*u*ttraum", but I'm really giving it little more than a "best guess". The place where the shreddings are collected, or "shot" (as in "geschüttet"), could be called all manner of things...if that is indeed what is meant. I cannot really see it having any relevance to bearings of any sort - but who knows...

The term "Lagerschottraum" may refer to the bearing bulkhead. You are here obviously dealing with maintenance work. This includes cleaning of the gear and bearing areas, namely the bulkheads.