QUESTION: The PRR regeared its PA-1 units for lower speeds when they reassigned them from passenger to freight service. Does anyone know exactly when this was done? (And, second question, is it likely that -- at the same or a different time -- they would have replaced the original motors with newer ones?)
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Relevant to some new information I have been sent.
As to the second question, the units were built in late 1948 and 1948. On the assumption that they had 752 motors, this would mean they had the original subvariant: 752 A or 752C, I think. By the early 1950s GE had an upgraded version of the 752 motor, and for what was for the time a high-horsepower freight unit the up-rated motors might have been desirable.
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Apparently the PRR did not regear their PB units, which they continued to use in passenger service. So, for people with photo archives: very few PRR passenger trains from the 1950s would have had PA units on the point, but there should be some photos out there showing a PB in the middle to an otherwise E-7/E-8 consist...
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Relevant to some new information I have been sent.
As to the second question, the units were built in late 1948 and 1948. On the assumption that they had 752 motors, this would mean they had the original subvariant: 752 A or 752C, I think. By the early 1950s GE had an upgraded version of the 752 motor, and for what was for the time a high-horsepower freight unit the up-rated motors might have been desirable.
--
Apparently the PRR did not regear their PB units, which they continued to use in passenger service. So, for people with photo archives: very few PRR passenger trains from the 1950s would have had PA units on the point, but there should be some photos out there showing a PB in the middle to an otherwise E-7/E-8 consist...
