I am currently rebuilding the Lionel Precision Motor [Atomic Motor] of my 1948 726 Berkshire. Reviewing the Greenburg Manual, I see that atop the brush holders are 2 screws, one each on each brush holder. What are these used for? All the photos I can locate on the internet for this unit, “which are very few”, these screws are missing.
I am new to this forum and I will post some photos once i am familiar with the process.
Thanks,… Granpa