Thanks, jward!

The GP40 schematics I had looked at looked mostly right, but had what appears to be can motors (maybe) instead of pancakes, which is what confused me.

I'll be using this to learn the ropes of tune-ups and maintenance, so it being a lower-performer might be a good thing -- I won't feel too bad if I break it.

Hello!
I'm new (again) to model trains, but not scale modeling -- I have an existing love for HO slot cars.

I had a train set as a kid back in the early 90s, fished it out of storage and set it up. As expected, the locomotive didn't run. I disassembled it and as expected, all the grease and oil had congealed and gummed everything up. During cleaning, I noticed that the gears on the geared drive wheels were cracked, allowing the wheels to spin independently of the gears.

So, my questions:

• How do I identify locomotives? I have pictures of below for reference for this one, but I don't want to post every time I need an engine ID. Is there a master list somewhere? I originally thought this might be a GP 40, but after some googling I think it might be an U36. I don't actually know what these model numbers mean, just repeating what I found in my research.
• Are replacement parts available? I see in the Bachmann shop they have listings for Universal HO Geared Drive Wheels. Are those really universal? I assume they're for a subset of locomotives, and probably newer locomotives. I don't know exactly when this one was made, but it's the early 90s. My guess is I probably got this around '93, as the newspaper I used to pack everything up with was dated '95.

Here's the pics, ignore the missing front drive-train and engine. I took pictures after I had already tore it apart for cleaning. It's a standard pancake motor. I saw on youtube that some of these models had a screw in the center of the engine to hold a clip on, it's not that model.




Thanks!