My Bachmann two axle trolley stopped running. The motor didn’t stop, but the trolley did. It sounded like a broken gear, so I took the motor block out and looked at them. While worn, they didn’t seem cracked or broken. The idler gears were tight on their axles. I removed the motor, got the gunky white grease off the worms, put a drop or two of light oil on the armature shaft and turned power on. It ran with little noise or vibration. Then I removed the wheels and axle sets and inspected them. No breaks or cracks in the gear, but it slipped on the axle, making the same snapping sound the truck did originally. So I cleaned the axle as well as I could and reg=gauged the wheels, which were about one eighth inch too tight.
For the time being, I decided to make a trailer out of the car, so i took out the idlers and the motor. Before I put the motor block back together, though. I realized that with the motor out, I couldn’t power the lights. I tried to put brass jumpers between the press metal contacts between the power in from the track, and the power out to the lights. For some reason, the contacts against the wheels are NOT picking up power from the wheels. I cleaned them but to no avail. They did work intermittently before the gears started slipping.
Any ideas what to do to fix electron flow?