During the 1950's and early 1960's, this style of locomotive formed the backbone of the Southern Pacific's fleet.  Riding on two, three-axle trucks, they had excellent pulling power and rode smoothly on sometimes questionable quality track, earning them the nickname "Cadillacs".  The engines had very long lives on the Southern Pacific, with many lasting into the early 1990's following an extensive rebuilding.

Even though they both had to cross mountain ranges, the Western Pacific never embraced six-axle locomotives as the Southern Pacific, and indeed most other mountain railroads, did.  The WP's equivalent power is abundant at Portola, with the best example being locomotive 707 .

567C - 16 cylinders

2250

 lbs.

60 ft. 8-1/2 in.

 MPH

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SD9

GM Electro-Motive Division

April 1955

20206

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