Baldwin "DT-6-6-2000" Locomotives

Last revised: May 31, 2023

By: Adam Burns

The DT-6-6-2000 was one of the most interesting models released by a major manufacturer. 

This design was a specialized type of locomotive intended for use in heavy drag service over short distances, such as on terminal railroads or moving cuts of cars between local yards.

Believing that there was a market for such, Baldwin released the DT-6-6-2000 directly after World War II, one of first models to employ the company's own prime mover.

For a switcher, it was massive and, ironically longer than virtually every road switcher or cab unit on the market at that time. 

As John Kirkland explains in "The Diesel Builders: Volume Three," the locomotive featured dual control stands for maximum flexibility, thus allowing operation in either direction without turning the locomotive. 

Ironically, for a design geared towards switching, the DT-6-6-2000 retained a high-hood on both ends, thus restricting a crew's 360-degree view from either the ground (seeing the engineer) or the cab.

Unfortunately, the design had mechanical issues and railroads were never really interested in such a specialized locomotive resulting in fewer than 50 constructed when production had ended.  


Santa Fe DT-6-6-2000 #2602 goes for a spin on the turntable at Redondo Junction (Los Angeles); July, 1956. collection.


The DT-6-6-2000 was an incredibly large switcher, originally cataloged in May of 1946.  At over 70 feet in length, and weighing a hefty 360,000 pounds (180 tons), the switcher was certainly one of the largest, longest, and heaviest of its kind ever built.

It utilized two of Baldwin's 608NA prime movers equipped with C-C trucks and producing 2,000 horsepower. Even into the 1940s, Baldwin still shrugged off the notion of diesels as main line freight locomotive.

The company also held the philosophy that any such model it did produce should be customized to whatever task a railroad desired or requested.

A Baldwin Locomotive Works builder's photo featuring one of its massive DT-6-6-2000 transfer switchers, demonstrator #2000, in December, 1948. This unit became Santa Fe #2606. Unfortunately, the transfer market never really took off and coupled with Baldwin's chronic reliability issues few of these sold. Despite their problems, Baldwin's diesels could certainly pull thanks to their powerful Westinghouse traction motors. For this reason, short line SMS Rail Lines in New Jersey still employs a rather sizable fleet of Baldwins in freight service.

This notion harkened back to the days of steam, which were always manufactured and tailored to a railroad's specific needs. 

This specialization led to the DT-6-6-2000's development. The switcher's classification was similarly based from the steam era and is why it includes many letters, dashes, and numbers.

The "DT" referred to Diesel Transfer while the first "6" referred to six overall axles; the second "6" referred to six powered traction motors; and "2000" stood for the horsepower rating.

The original DT-6-6-2000 variant was Elgin, Joliet & Eastern #100 completed on May 13, 1946.  As a test-bed unit it was slightly different from the production DT-6-6-2000's with normally aspirated (NA), 8-cylinder engines and no crosswalks. 

The latter was a feature requested on production DT-6-6-2000's, increasing their overall length by nearly 4 feet.

EJ&E #100

Delivery Date5/13/1946
Baldwin Class0-6-6-0-1000/2 NA5
Engine608NA, 8-Cylinder In-Line (2)
Engine BuilderDe La Vergne
Carbody StylingBaldwin
Length (Between Coupler Pulling Faces)70' 6"
Weight365,000 Lbs
Height (Top Of Rail To Top Of Cab)14'
Truck TypeGSC Rigid Bolster
Truck Wheelbase13'
Wheel Size42"
Traction Motors370F (6), Westinghouse
Traction Generator480C, Westinghouse
Auxiliary GeneratorYG40D, Westinghouse
Gear Ratio15:63
Tractive Effort Rating64,200 Lbs at 9.4 MPH.
Top Speed60 MPH

Data Sheet and Specifications

Entered Production3/3/1948 (Elgin, Joliet & Eastern #101)
Years Produced3/3/1948 - 8/23/1950
Baldwin ClassDT-6-6-1000/2 SC
Engine606SC, 6-Cylinder In-Line, Supercharged
Engine BuilderDe La Vergne
TurbochargerModel H-503 (Elliott Company)
Carbody StylingBaldwin
Length (Between Coupler Pulling Faces)74'
Weight354,000 Lbs (Optional ballasting up to 375,000 Lbs.)
Height (Top Of Rail To Top Of Cab)14'
Truck TypeGSC Rigid Bolster
Truck Wheelbase13'
Wheel Size42"
Traction Motors370G (6), Westinghouse
Traction Generator480F, Westinghouse
Auxiliary GeneratorYG40D, Westinghouse
Gear Ratio15:63
Tractive Effort Rating64,200 Lbs at 9.4 MPH.
Top Speed60 MPH

Production Roster

Owner Road Number Baldwin Serial Number Construction Number Completion Date
Elgin, Joliet & Eastern1011737093/3/1948
Elgin, Joliet & Eastern1022737103/7/1948
Elgin, Joliet & Eastern1033737113/13/1948
Elgin, Joliet & Eastern1044737123/19/1948
Elgin, Joliet & Eastern1055737134/1/1948
Elgin, Joliet & Eastern1066737143/31/1948
Elgin, Joliet & Eastern1077737154/8/1948
Elgin, Joliet & Eastern1088737164/21/1948
Elgin, Joliet & Eastern1099737174/23/1948
Elgin, Joliet & Eastern11010737184/29/1948
Atchison, Topeka & Santa Fe260011737486/3/1948
Elgin, Joliet & Eastern11112737195/6/1948
Elgin, Joliet & Eastern11213737205/7/1948
Elgin, Joliet & Eastern11314737215/24/1948
Elgin, Joliet & Eastern11415737226/5/1948
Elgin, Joliet & Eastern11516737236/7/1948
Elgin, Joliet & Eastern11617737246/25/1948
Elgin, Joliet & Eastern11718737257/1/1948
Elgin, Joliet & Eastern11819737267/6/1948
Elgin, Joliet & Eastern11920737277/12/1948
Elgin, Joliet & Eastern12021737288/2/1948
Elgin, Joliet & Eastern12122737299/9/1948
Elgin, Joliet & Eastern12223737308/13/1948
Elgin, Joliet & Eastern12324737319/13/1948
Elgin, Joliet & Eastern12425737329/13/1948
Elgin, Joliet & Eastern12526737339/13/1948
Trona Railway5027741234/22/1949
Trona Railway5128741244/22/1949
St. Louis Southwestern Railway (Cotton Belt)26029735325/28/1948
Minneapolis, Northfield & Southern20307413712/17/1948
Minneapolis, Northfield & Southern21317413812/30/1948
Minneapolis, Northfield & Southern2232741391/12/1949
Minneapolis, Northfield & Southern2333741401/14/1949
Minneapolis, Northfield & Southern2434741411/18/1949
Baldwin Locomotive Works2000 (2nd): Became Santa Fe #2606357398012/1/1948
Atchison, Topeka & Santa Fe260136744348/10/1949
Atchison, Topeka & Santa Fe260237744357/26/1949
Atchison, Topeka & Santa Fe2603387443611/23/1949
Atchison, Topeka & Santa Fe2604397443712/8/1949
Atchison, Topeka & Santa Fe2605407443811/29/1949
Duluth, South Shore & Atlantic300417466810/25/1949
Duluth, South Shore & Atlantic301427466910/23/1949
Duluth, South Shore & Atlantic302437467010/24/1949
Baldwin Locomotive Works2001 (2nd): Became Elgin, Joliet & Eastern #12644746712/1/1950
Duluth, South Shore & Atlantic30345746728/23/1950


As it turned out there was not much of a market for the transfer switcher; Baldwin ultimately only sold 46 units by the time production had ended in February of 1950.

The Elgin, Joliet & Eastern purchased the most, 27 (including one of the demonstrators), and actually became quite famous for its fleet although they would later be re-powered with Electro-Motive's reliable model 567 prime movers.

With EMD power plants the locomotives remained in service into the 1970's.  Today, one Baldwin DT-6-6-2000 remains preserved; former Minneapolis, Northfield & Southern Railway #21 at the Illinois Railway Museum.


  • Foster, Gerald. A Field Guide To Trains. New York: Houghton Mifflin, 1996.
  • Kirkland, John F. Diesel Builders, The:  Volume Three, Baldwin Locomotive Works. Pasadena: Interurban Press, 1994.
  • Pinkepank, Jerry A. Diesel Spotter's Guide.  Milwaukee: Kalmbach Publishing Company, 1967.
  • Solomon, Brian.  Baldwin Locomotives.  Minneapolis:  Voyageur Press, 2009.
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