The EMD SD9 is a model of diesel locomotive built by General Motors Electro-Motive Division between January 1954 and June 1959. An EMD 567C 16-cylinder engine generated 1,750 horsepower (1.30 MW). Externally similar to its predecessor, the SD7, the SD9 was built with the improved and much more maintainable 567C engine.

Dec 17, 2024 · The SD9, often nicknamed the "Cadillac" for the smooth ride its Flexicoil trucks provided, was the builder's second six-motored model. It followed the early SD7, offering a slight increase in horsepower.

Mar 30, 1991 · The SD9 had a starting tractive force of 91,000 lb, which was 42 percent greater than a four-motor geep. The TE differential, which represented a substantial savings in long-term operating costs, caught the attention of more than a couple of first-time buyers.

This is a summary, listing every EMD SD9 locomotive in preservation. All are listed by serial number.

EMD SD9; Data Sheet Information Compiled by: JEAN-DENIS BACHAND: Revised: 15 August 2006 : Artwork by: Jean-Denis Bachand-Engine Builder: EMD: Engine: 567C 16 cylinder

The EMD SD9 (also known as the Cadillac) is a six-axle diesel-electric locomotive built by General Motors Electro-Motive Division between January 1954 and June 1959. Four hundred and seventy-one SD9s were built for American railroads, while a further 44 were produced for export.

EMD's production of the GP7/9 far out-distanced that of the larger six-axle SD7/9 by a 9 to 1 margin during the 1950s . Yet, the builder's six-motor veteran has been often the preferred choice by buyers shopping in the second-hand locomotive market, rather than the geep.

May 16, 2023 · The Electro-Motive Division’s original six-axle diesel-electric road switchers were the SD7 and SD9. Producing 1,500 and 1,750 hp, respectively, they set the stage for larger and more powerful six-axle locomotives that would come to dominate the industry.

The EMD SD9 six-axle diesel locomotive was the successor to the SD7 in EMD's catalog, developed alongside its 4-axle counterpart, the EMD GP9. The SD9 utilized a 16-567C prime mover generating 1,750 hp. It was relatively popular, with 171 units for US railroads, and 44 for export. These engines...

Produced in EMD’s La Grange, Illinois, plant from January 1954 through June 1959, the SD9 utilized a 16-cylider EMD 567C diesel engine generating 1,750 horsepower (1.30 MW), powering the locomotive’s six traction motors (one per axle) – an improvement over the SD7.