Description
Introduced in 1992, EMD???s SD70M was a 4000 horsepower locomotive that rode on EMD???s new steerable truck design, known as the HTCR-II radial truck. This new truck allowed the locomotive to transfer its power to the rails more efficiently, which in turn enabled two SD70 series locomotives to pull a train that would have taken three SD40-2s to pull. Union Pacific was the biggest purchaser of SD70M units when they were introduced, buying more than 1400 individual locomotives, one of the largest locomotive batch purchases in history.
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