Yep. I don't know how long it lasted, but there was a panel by the cylinders on the engineer's side that had the button to rotate the drivers on the 2903. The locomotive was lifted ever so slightly off the rails.
Standing inches away from all that machinery in motion is something not easily forgotten.
I also remember the operating display inside, by a west wall near the Pennsy cab.
As I said, this was the 1970's when I was there. I would guess the first time it broke down was the last time it broke down and was removed.
Rusty