PJB posted:...what is a side frame and how do I remove it? Is it the outer fascia of the wheel trucks or ...? I don't see any screws to take it off.
I'm guessing it's just these screws (circled) holding the side-frames (scribbled outline). In which case it seems the axles would just fall out and you can inspect the bearings for gunk build-up or whatever.
If you have been gradually moving up the throttle each year, I wonder if the engine also deserves inspection, lubing, whatever.
