An acquaintance dropped off a Marx 1666 locomotive that won't run. The headlight and smoke unit work, but it just sits and buzzes when power is applied. He told me that it was last run about 20 years ago before being packed away. One of the houses that he lived in had high-sulphur well water that wreaked havoc on some of his electronic equipment. The pick-up slider on the locomotive had turned black from exposure to the sulphur. It looks like the commutator has also been affected.
I took a video of it with the shell off. I cycled it on and off. I noticed some arcing from the area of the reversing unit (hole in front of the front drive wheel) during the second power cycle. I also took a photo of the commutator.
It appears the only way to access the reversing unit is to disassemble the entire motor. I have never worked on a Marx locomotive before and don't want to open a can of worms. Can anybody with experience with these locomotives give me some pointers? Or should I just find another motor and call it a day?