Background and Development
During the 1950s, EMD had become the major player in the North American diesel locomotive market, with Alco relegated to second place. This was largely due to their Model 244 diesel engine suffering from significant reliability issues. In response to these issues a new engine design the ALCO 251 was approved for development in 1951. This engine was put through nearly five years of testing before entering domestic production in four sizes 900 horsepower (670 kW), 1,800 horsepower (1,300 kW), 2,000 horsepower (1,500 kW), and 2,400 horsepower (1,800 kW) in a new line of locomotives.
By 1956 General Electric had launched their first Universal Series road locomotives primarily as export units. The U25B followed in 1961 and rapidly propelled GE into second place in the locomotive market, behind EMD.
Faced with this market situation, Alco in 1962 completely redesigned their road locomotive line, creating what would become the Century Series. The locomotives were designed to equal and surpass competitors' products in terms of both features and performance. To meet that end, the new locomotives included, among other features, a redesign of the air system, an improved traction control system, and improved accessibility and maintainability.
The series was first introduced on January 29, 1963, in Chicago, Illinois, consisting of three locomotives, the 2,000-horsepower B-B model C420, 2,400-horsepower B-B model C424, and the 2,400-horsepower C-C model C624, which was subsequently abandoned in favor of a more powerful model, the 2,750-horsepower C628. During speeches at the event, Alco executives promoted the new locomotives' reduced operating costs, a major effort in the design of the machines. Combined with unit reduction through higher powered locomotives, as well as liberal trade-in terms, Alco claimed operating cost could be reduced as much as 44%.
Read more about this topic: ALCO Century Series Locomotives
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