George Andrews Wrote:
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> An excerpt from Joe Strapac's Southern Pacific
> Historic Diesels - Volume Nine - ALCo PA / PB
> PAssenger Locomotives : " More importantly, by
> 1952 SP had grown weary of the poor maintenance
> record of the type # 244A engines in these units.
> Beginning in July 1952, the type #244A prime
> movers were replaced by current production #244D
> engines with water cooled, ALCo - built
> turbochargers. Then in the mid - fifties the
> complex General Electric Amplidyne control system
> received an upgrade and simplification. Every one
> of the class DP - 5 units was to receive an
> electrical upgrade between 1956 and 1960 in order
> to install more reliable components, simplify
> cabling arrangements and ease maintenance
> problems. "
> ALCo rushed the 244 series diesel into
> production; Santa Fe & T&NO's early PA's had
> issues with block flex resulting in loose main &
> rod bearings, and of course that air - cooled
> turbo was not up to the job. At least Espee stuck
> with the 244 series prime mover and its' 2000 H.P.
> rating. Santa Fe, Rock Island ( FA's ), and MoPac
> among others would re - engine their PA's with EMD
> prime movers, which had quickly become the
> industry's Energizer Bunny for running and running
> and running. Santa Fe's " Christine " set of re -
> engined PA - PB - PA were dogs, until a sharp
> diesel mechanic noticed several electrical
> circuits has been mis - wired and / or overlooked
> in the rebuild. Once repaired, they were race
> horses.

No MoPac PA's were re-engined with EMD engines.