The other day, I notices a missing piece on the top of the coal tender. It is a small water valve I guess. There is one on the exact opposite side that is there. It has like a little handle on it. The missing one is on the right side of the unit. How do I get a replacement?
Try calling the service department:
http://www.bachmanntrains.com/home-usa/service.php
Use the 215-533-1600 number.