Hence being known as the ' SD9043MAC' due to being rated at 4,300hp.īecause of the US EPA's strict 'Tier 2' policy, the SD90MAC and subsequent models have since been replaced in favor of succeeding types or models of more recent tier-compliant diesels (such as the GE ES44AC, and EMD's SD70ACe). Many are still currently in active service, yet no longer utilize the special 6,000hp engine, and have been re-rated to 4,300hp (although some never received said engine). Union Pacific (UP) and Canadian Pacific (CP) were the only two North American Class 1 railroads to purchase the SD90MAC, while later customers such as CITX/CEFX purchased several for leasing service. At least 478 were built.Īn SD90MAC with such example in the photo being one of the first built and ordered (specifically for the Union Pacific). It was one of the very first standard, high-powered, AC-traction diesel locomotives produced by EMD, as well as being one of the only single-engined 6,000hp diesel locomotives in existence, for it was once part of an otherwise failed attempt at acheiving 6,000hp for said type or form of locomotive. The EMD (Electro Motive Division) SD90MAC is a type of six-axle, AC-traction, 16-cylinder, 6,000hp to 4,300hp diesel locomotive produced from 1995 to 2000. 8.2 SD90MAC-H (units equipped with the 'H' engine).5 Cummins QSK-95 Diesel Locomotive (HTL4200AC).

Mac 90 for sale