The EMD SD32ECO is a C-C diesel-electric locomotive rebuilt by

Electro-Motive Diesel Progress Rail Locomotives, doing business as Electro-Motive Diesel (EMD), is an American manufacturer of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. The company is owned by Caterpillar through its sub ...

. It is primarily the application of a conversion kit to an existing

EMD SD60 The EMD SD60 is a , six-axle diesel-electric locomotive built by General Motors Electro-Motive Division, intended for heavy-duty drag freight or medium-speed freight service. It was introduced in 1984, and production ran until 1995. History and d ...

-type locomotive. This involves replacing the existing 710G3A V16

prime mover Prime mover may refer to: Philosophy *Unmoved mover, a concept in Aristotle's writings Engineering * Prime mover (engine), motor, a machine that converts various other forms of energy (chemical, electrical, fluid pressure/flow, etc) into energy o ...

with an

EPA The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it be ...

Tier-II-compliant 710G3B-T2

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

V12 engine, with

electronic fuel injection Manifold injection is a mixture formation system for internal combustion engines with external mixture formation. It is commonly used in engines with spark ignition that use petrol as fuel, such as the Otto engine, and the Wankel engine. In a mani ...

. Many of the donor SD60's major components and subsystems are recycled, and are recertified as equal to new. However, the locomotive's control system is all new.

Owners

Starting in 2012, twenty eight

Union Pacific The Union Pacific Railroad , legally Union Pacific Railroad Company and often called simply Union Pacific, is a freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Paci ...

SD60M The EMD SD60 is a , six-axle diesel-electric locomotive built by General Motors Electro-Motive Division, intended for heavy-duty drag freight or medium-speed freight service. It was introduced in 1984, and production ran until 1995. History and d ...

s were sent to

Electro Motive Diesel Progress Rail Locomotives, doing business as Electro-Motive Diesel (EMD), is an American manufacturer of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. The company is owned by Caterpillar through its sub ...

for this rebuild and are in revenue service as UP 9900-9927. ''SD59MX'' is the Union Pacific designation for this type.

BNSF BNSF Railway is one of the largest freight railroads in North America. One of seven North American Class I railroads, BNSF has 35,000 employees, of track in 28 states, and nearly 8,000 locomotives. It has three transcontinental routes that ...

sent 3 SD45-2 locomotives to be rebuilt as SD32ECOs. Unlike UP's SD59MX, BNSF's SD32ECOs retain the appearance of an SD45-2. So far, 3 have been completed as BNSF 1350-1352.

UP SD59MX Features

The SD59MX is remanufactured from the carbody and major mechanical and electrical subsystems of an

EMD SD60M The EMD SD60 is a , six-axle diesel-electric locomotive built by General Motors Electro-Motive Division, intended for heavy-duty drag freight or medium-speed freight service. It was introduced in 1984, and production ran until 1995. History and d ...

"donor". The EFI-equipped 710 engine, however, is all new as are the engine and locomotive control systems.

is the first

Class I railroad In the United States, railroad carriers are designated as Class I, II, or III, according to annual revenue criteria originally set by the Surface Transportation Board in 1992. With annual adjustments for inflation, the 2019 thresholds were US$ ...

to order them. The engine control system is adaptable to both minimum emissions and minimum fuel consumption modes, depending upon their assignment.

Appearance

The external appearance of the converted locomotive is sometimes altered by application of a flared radiator section, similar to the SD70M-2 and SD70ACe Tier-II, and similar to late model SD70M and SD70MAC locomotives in appearance. The recently converted locomotives (including UP 9905 and 9906, seen recently at the CSRM; and others up to at least UP 9924) have also had the SD70M-2/SD70ACe-style safety fuel tanks applied.

References

* ''Railfan And Railroad Magazine, October 2009, page 22'' *
710ECO Repower Solutions by EMD
'. Retrieved on September 23, 2009 {{Green Locos Diesel-electric locomotives of the United States C-C locomotives SD32ECO EPA Tier 2-compliant locomotives of the United States Rebuilt locomotives Standard gauge locomotives of the United States