Hello Pete,
Well, referring to the Lionel flywheel with the encoder ring 6208557128 listed as 2mm, I just took a second look at the Lionel site description of the flywheel. I agree with you that they are saying "2mm" as in set screw not shaft diameter. The author of the tread said that he was able to locate the correct Lionel part number. He unfortunately didn't update his post with his results or the correct Lionel part number.
I did order the flywheel last night thinking I had the correct 2mm flywheel from Lionel. Reading and searching multiple threads, everyone thread kept referring back to the 620-8557-128 flywheel and sensor ring having the 2mm shaft Right? I also ordered a replacement M4V sensor board and the correct Legacy electro couplers that will fit correctly on my Engine and the Legacy system. I know, I really didn't see the point in taking apart a brand new Lionel motor right out of the box, so it will go into my parts box with the other one, for all I know they my fit one of my Lionel legacy DC TMCC engines.
In the light of all of this, with no apparent factory Lionel flywheel available, perhaps boring the 2.3mm flywheel and installing a press fit bushing will be the lesser of two evils? I follow you both Albrecht, I agree that the oblong orbit using the 2.3 setscrews as the anchoring point is a bad idea. Thank you for the Timko puller information. I actually had a small puller from one of my helicopters that fit perfectly.
Thank you for the assistance, Kind regards,
Carl
