Gentlemen,
Success with my method to take the slop out of the horizontal worm grear shaft and getting the spur gears fully engaged. The ball bearing on one bearing block had to be pushed in much more than the other. Filling the gap created at the rear of the bearing blocks will keep the problem from reoccurring.
As a final performance enhancement I resurfaced the commutator. Very fast, smooth and quiet now. Wouldn’t know it’s the same locomotive I started with.
AC
