I have an HO train I bought for my son in 1968 in Germany.  I found it in a box this last year and was able to get it to run for Christmas and the grandkids loved it.  Unfortunately, the brass bearings are worn out and it is not running very well.  The engine is modeled similar to the 4-4-0 American with the engine in the coal tender and a dog bone like drive shaft to the locomotive.

My question is do you think I can find an engine that will fit the coal tender and a replacement connector between the coal tender and locomotive?  What information would you need to see if you have parts available?

Owlbert