@Norton posted:The overall diameter of the worm is so small that diameter of the motor shaft diameter as actually larger than the root diameter of the gear. The mounting hole in the gear therefore is blind and does not go through the length of the gear as it does on most all other worms usually found on these motors. There is nothing to push against when trying to remove the gear. Couple that with the fact that it has an extreme interference fit, maybe as much as .003-.004" undersize its near impossible to simply pull off without totally destroying the motor.
Even Lionel realized this was a poor design. Their second generation Lionmaster Big Boy uses a different larger gear. Unfortunately its doesn't fit the 1st generation engine.
I think the only fix here will be a new gear will have to be machined and installed on a new motor.
Pete
Hit the nail on the head ! Thanks Pete
Alex
