I have ask this question in the past, but need more help. I have the older Williams brass N&W "J" 4-8-4. After a call to Bachmann, they were quite sure that the had a old chassis around and I send it off. Well, after a month I rec'd my "J" back saying they were unable to repair my engine. All it needed was a replacement hex head screw for a siderod and replacement traction tires. I know there are other fixes for the traction tires, but the side rod screw is very small and sets inside the side rod. I have been unable to find any tool that will fit the screw to find out the correct thread size. If I can get the screw off from the other side rod, I can at least find a replacement screw of the same thread if not the same head. I could live with a sloted head. I am will to send my "J" out to someone who thinks they can do a fix on the screw. Will pay what is requested.
Thanks, I would love to see may "J" back on the track!