It is constructed in both single- and dual-engine variants, and is primarily used in low-speed and high tractive effort switching and shortline applications.
[1] The Leaf was introduced in the single-engine model in 2010,[2] of which 32 had been built by the end of 2012.
[3] The dual-engine version of the locomotive, powered by two 600-horsepower Cummins QSX15 engines, was introduced in 2012.
[3] In 2016, the locomotive was updated to meet EPA Tier 4 emissions standards,[2] and the first Tier 4–compliant Leaf entered service in mid-2017.
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