Answer I found this motor with Baldwin wheels in my spares. It was left over from make 1 out of 2 project on a 229. At least that is what my memory tells me.
The baldwin wheel diameter that runs on the rails is approx .08"/2mm bigger. That means the engine stands .04"/1mm taller. At first it didn't run well. The 1662 has sliding shoes and I needed to spread them open some to get good contact again. I think it looks good and runs well on my O track and switches now.
The 229 had roller pickups that reached a little farther.
This may help to explain my 1656 that has this style motor, the 1662 style wheel and roller pickups. It really doesn't like the switches since the roller bottoms out also.
Edit 8/12/2023: 1656 was made to handle the switches and UCS, no change needed. The problem I found with my 1656 is explained below.
