Reply to "RT: What do the throttle positions relate to?"

Big JimOGR Forum Member DIGITAL SUBSCRIBER

Kelly Anderson posted:
Kelly Anderson posted:
I (dimly) recall reading in an operator's manual for GP35's, that engineers were advised to avoid using Run 5 as much as possible. Is that correct, and if so, why?
"For proper traction motor cooling, the locomotive should never be operated on grades below the 5th throttle position."
This quote from the helper/pusher thread must be what I was thinking of. I would assume that below the 5th notch, slower engine RPM results in less traction motor cooling air. Is that it?

We were never advised of any restriction like that. If it took the fifth notch to stay at the prescribed speed, that is what was used. Never had a problem.

7/11/185:23 PM

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