I have a polar express o gauge train set. I took off the metal shell to look at the smoke unit to replace it. When I put the shell back on, I noticed that on the right side, the coupling rods are loose. With the shell on, the coupling rods run into something and make it hard for the train to move. How can I tighten coupling rods??
Thanks!
Usually you just tighten whatever screws are holding them in place. If this does not help, post a clear picture of the right side wheels and rods.
Which catalog number engine do you have?
Larry