B30-7 Rear Truck Derailing

[Ken S.]

A recently purchased B30-7 was track tested ad the rear truck seems to derail after the locomotive moves about an inch in either direction. I'm not sure what the problem could be. I know it's not my track though

[Len]

Sounds like the drive shaft to that truck may be out of place. Only way to be sure is to pop the top and look.

Len

[Ken S.]

Sounds like the drive shaft to that truck may be out of place. Only way to be sure is to pop the top and look.

Len

I got the shell off and became lost as to what to do next.

[Ken S.]

I took the cover off of the rear truck and I still can't find anything wrong.

[Ken S.]

My GG-1 has ruled out a track issue.

[jward]

Have you checked the wheel guage?