@harmonyards posted:There are bearings mounted on the shaft, especially the most rearward shaft, the one with double couplings.....IF the Lionel worm shafts have a non-flanged bearing on them, you’ll need to carefully pull the couplers from the shaft, and install flanged bearings F684ZZ 4X9mm ( that’s not a MTH part no.) .....you’ll need to set the worm shaft endplay, and be wary of gear depth. Also be sure to set worm shaft orientation over the worm wheel....too far left or right from center, and you’ll eat up the worm wheel’s teeth, and then you’ll be pulling wheels....
Pat
That's correct. The Lionel worm shafts will come with bearings but they are the wrong ones. They can be swamped out. The worm shaft gears should have the correct pitch but they should be checked for depth are wear pattern. Something like Prussian blue (you know this stuff if you've ever set up gears in an automotive situation) would be helpful. Whatever you do DO NOT run the locomotive powered by a motor until you are 100% certain you have the worm shafts set up correctly.
