After an hour of searching I can't find any help to my problem. Have the Lionel Diesel 6-18775. It only has about two hours on it. But it hasn't been used since Christmas 2016. I have a christmas layout and can run three other thomas trains on it simultaneously. The diesel worked for about 5 minutes or so before we took it off the tracks. Put it back on about half hour later and now it doesn't move. Sound works, Bell works, Announcements work. Whistle works. So I took it apart a couple of hours ago looking for anything that might explain why. My hopes were up when I thought I found what appeared to be some excess lubricant on the axles. Use some contact cleaner and swabs to clean it along with rollers, etc. Put it all back together again thinking it was going to run and still no motion. Now I will also add that when I did first try prior to tear down it acted like it was going to work when it went about two feet before stopping. Any ideas?
PS. I would highly recommend to anyone contemplating taking the tiny single MACHINE screw out from the pickup assembly that you think twice about it, as it has a nut on the other end and it's definitely no fun putting it back on. Probably from my inexperience of tearing them apart - which is a first.
