Actually, I don't want to change out the sets, unless I have to. The problem is an NS Non-power unit that does not track correctly through a curve. I have several other NP units of the same type that go through fine, and up until this unit, have not had issues with the track. So things point to the engine. I checked the lead truck on a flat piece of track (Checked with a straight edge.) The truck can have only 3 of the 4 flanged wheels touching at once. So I think I've found the problem, so of. Now it comes down to what is actually wrong: the truck casting, the wheel set(s), or improper installation, which is why I posted the question. I know how to get the wheel sets out (4 small screws and the 2 for the pickups), but what do I look for to tell what is wrong?
Chris
LVHR
PS Mike, you are right. It is actually an AC unit. The trucks are very similar.
