I have a MPC 9162 caboose whose light only works on and off, mostly off. The roller on the truck is very loose but not sure how to fix it. Is it fixable or do I need to put a new truck on it. The roller wiggles back and forth and I can pull it way out. It was hitting the metal part of the truck and causing a short and shutting down the transformer. I wrapped electrical tape around the area causing the short and its goes ok but no light. Any suggestions as what I can do? Thanks in advance.
Bruce