Am I correct that the F-3's were only used for freight? Were the Alco PA's re-geared by Lehigh Valley when they were dedicated for freight after passenger service ended? 
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To answer the question put forth in the header of this post: Yes. There were other steam generator-equipped units on Lehigh Valley.
Alco-GE RS2's 210, 213, and 214 were equipped. 2nd 211, which came second-hand from the Pennsylvania RR, was a "hammerhead" -- an uncommon variant of the Alco-GE RS3 with full-height short hood, which contained a steam generator.
It does not appear that these units were commonly used on LV passenger trains, as there was an adequate number of Alco-GE PA1's to power the shrinking fleet of passenger trains, including engines receiving scheduled maintenance, under normal circumstances.
@Number 90 posted:To answer the question put forth in the header of this post: Yes. There were other steam generator-equipped units on Lehigh Valley.
Alco-GE RS2's 210, 213, and 214 were equipped. 2nd 211, which came second-hand from the Pennsylvania RR, was a "hammerhead" -- an uncommon variant of the Alco-GE RS3 with full-height short hood, which contained a steam generator.
It does not appear that these units were commonly used on LV passenger trains, as there was an adequate number of Alco-GE PA1's to power the shrinking fleet of passenger trains, including engines receiving scheduled maintenance, under normal circumstances.
Thanks for the informative reply. So I take it the PA's outlived LV's passenger service? What were used for after that?
@Chas posted:Thanks for the informative reply. So I take it the PA's outlived LV's passenger service?
Yes.
What were used for after that?
Freight.
Lehigh Valley went out of the passenger business fairly early, around 1960, when their PA1's were not fully amortized. While they would not have been first choice for this, Alco-GE PA1's were suitable for use in freight service (general freight service, not coal trains on mountain grades) due to their double-tough electrical systems, and they had plenty of horsepower for speed.
