I purchased a train with 3 cars from Hawthorne Village that is a San Francisco Championship Train and it was manufactured by Bachmann and is a HO gage train.  It has 4 cars:
1.  EMD F7A Locomotive
2.  Engine
3.  Dome passenger Car
4  Championship Flat Car
I do not have any diagrams or part lists for any of the cars and have talked to the Hawthorne people about this and they tell me to talk to Bachmann.  Bachmann tells me to talk to Hawthorne Village.  I have looked on the Bachmann web site but cannot find what I need.  Any suggestions?