John Jay:
We actually just had Titan machine convert the shaft to a new style trust bearing, the original was a two piece design was trashed. There is about 0.020 of backlash , so it's really worn, units 90 years old. The last mod didn't get a new machine. I found signs of the machine running with no lubricant at some point, lots of inclusions on the gears , and 4 deformed teeth that I had to clean up with a dremal, but nothing else really out of line for such an old machine. Ive never seen no wipe on one side of the teeth before .