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EMD "NW2" Switchers: Data, Specs, Roster

Last revised: February 20, 2025

By: Adam Burns

The NW2 followed Electro-Motive's earlier NW, NW1, and NC models; switchers capable of producing 900 horsepower.

All of these original designs were equipped with Winton's 201-A prime mover while the NW2 was the first to utilize General Motors' model 567.

Electro-Motive saw enough interest in these early designs, along with its first SW models, to warrant cataloging further switchers through the 1940s.

At the time, then-EMC was fast becoming the industrial leader in diesel-electric manufacturing having released its popular FT cab model in 1939.

That particular locomotive would silence steam power nearly single-handedly.  For Electro-Motive, it seemed every model it released from the 1940s through the 1970s was a success. 

The NW2 would go down as one of EMD's most popular small switchers.  When its 10-year production run had ended some 1,139 units had been built for a variety of Class Is, short lines, industrial operations, and even a few Canadian lines.

Today, several of these resilient switchers carry on in service at private industries, small short lines, and tourist lines. Its rugged design is a testament to the engineers at EMD during the company's height of production. 

Photos

Burlington (Fort Worth & Denver) NW2 #605 switches a local customer in Wichita Falls, Texas, circa 1965. American-Rails.com collection.

Overview

Electro-Motive's NW series entered production in 1937 as a successor to the NC, a switcher sporting a cast frame.

At the time some railroads still preferred this manufacturing method which had long been employed in the construction of steam locomotives.  However, welded frames were proven to be stronger and cheaper to produce.

The NW originally referring to:

• Nine-hundred horsepower


• Welded frame.

However, with the NW2's introduction the nine-hundred reference was dropped as its new 12-cylinder 567 could produce an additional 100 horsepower. 

Lehigh Valley NW2 #183 sits next to Reading C424 #5205 at Allentown, Pennsylvania on May 17, 1975. Author's collection.

The NW2 featured a frame with the same length (44 feet, 5 inches) as its predecessors with the taper near the cab for improved visibility.

It also came equipped with EMD's standard B-B trucks and lacked a sandbox on the front platform that was commonly found on early SW models.

Its other notable spotting feature was two conical stacks mounted just ahead of the cab.  As Jerry Pinkepank notes in his book, "Diesel Spotter's Guide," the NW2 is most easily distinguishable from its earlier counterparts by the lack of small louvers on the side of the hood. 

Erie Lackawanna NW2 #425 (built as Erie #424) is seen here at work in October, 1969. Location not listed. Author's collection.

Sales for the NW2 quickly took off; not only were these little switchers ideal for any application but they were also inexpensive. EMD also offered a cow-calf version known as the TR, TR2, and TR3.

The first and final models (TR, TR3) were sold only to the Illinois Central (three sets) and Chesapeake & Ohio (two sets).

Data Sheet and Specifications

* Most construction was suspended between 1942-1945 (World War II).

** According to Electro-Motive's operating manual the D15A main generator and D27 traction motor was installed in NW2's built after August, 1949.

Missouri-Kansas-Texas ("Katy") NW2 #10 (built as 1029) is seen here at the shops in Parsons, Kansas, circa 1969. American-Rails.com collection.

Production Rosters

EMD

(Total Built = 1,115)

Export

(Total Built = 24)

These NW2's were built at La Grange for Canadian National and Toronto, Hamilton & Buffalo.

* Became Union Pacific #1000.

Sources

• EMD. Operating Manual #2303: 600 & 1000 HP Switching Locomotives (Models SW1 & NW2; 567 & 567A Engines). La Grange: Electro-Motive Division (General Motors Corporation).

• EMD. Operating Manual #2303: 600 & 1200 HP Switching Locomotives (Models SW1 & SW7; 567 Series Engines). La Grange: Electro-Motive Division (General Motors Corporation), January, 1950 (5th Edition).

• Foster, Gerald. A Field Guide To Trains. New York: Houghton Mifflin, 1996.

• Hayden, Bob. Diesel Locomotives: Cyclopedia, Volume 2 (Model Railroader). Milwaukee: Kalmbach Publishing Company, 1980.

• Marre, Louis A. Diesel Locomotives: The First 50 Years, A Guide To Diesels Built Before 1972.  Milwaukee: Kalmbach Publishing Company, 1995.

• Pinkepank, Jerry A. Diesel Spotter's Guide.  Milwaukee: Kalmbach Publishing Company, 1967.

• Solomon, Brian.  EMD Locomotives.  Minneapolis: MBI Publishing Company, 2006.

Baltimore & Ohio NW2's #9544 and #9543 layover in Cincinnati, Ohio; March, 1975. American-Rails.com collection.

However, the TR2 was fairly successful as thirty-six sets were acquired by the Belt Railway of Chicago, Milwaukee Road, Burlington, Chicago & North Western, Chicago Great Western, Illinois Central, and Southern. 

Production on the NW2 began in May, 1939 when Minneapolis & St. Louis D-139 rolled out of LaGrange.  It remained in the catalog until 1949 when Arkansas & Louisiana Missouri concluded the line in October of that year.

Today, the versatility and reliability of these small switchers speaks for itself as many NW2s remain in use in all types of applications.