This locomotive came with Lionel's Santa Fe Fast Freight set (O scale). It's producing metallic grinding noises after it's been running for about 15 minutes. The set is brand new, and we'll get warranty repair if we have to, but we'd first like to check the gears and bearings and see if a little grease will fix the problem.
We haven't been able to find a service manual, or even basic instructions on how to get to the motor.
Any help appreciated.