Question re new Bachmann Diesel

[RobertInOntario]

Thanks for all of the above feedback ... I really enjoy this, learning about both the model and the prototype!

Re the coupler -- the frame vs. truck coupler explanations make sense, except why would the coupler on the front end of the loco (which is identical to the one at the rear) work totally fine hauling the same freight cars but the one at the reverse end of the loco doesn't? This leads me to think that the problem still lies with the coupler itself, which has lost its springiness and simply needs replacing. I'll still see if I can install a longer Kaydee one although the socket doesn't seem designed for the Kaydees.

Also, I tried unsuccessfully to reattach some other traction tires to one of the drive wheels. It seems almost impossible to fit the tire back onto this wheel as there is no room to maneuver. Does anyone know if there is an easy way to do this? (I had the same problem with one of my British tender-drive steam locos -- I did manage, in the end, to get the tire installed but it took a long time and was a real pain! Was also worried about damaging the loco.)

Thanks again,

Rob