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ALCO DL-203 "Black Maria"
Power type Diesel-electric
BuilderAmerican Locomotive Company
Total production3
AAR wheel arr.B-B
UIC classificationBo'Bo'
Prime moverALCO 241
Engine type4-stroke diesel

The ALCO DL-203 diesel-electric locomotive (known informally as the Black Maria) was an experimental freight locomotive produced by ALCO of Schenectady, New York.[1] It was a predecessor to much better known ALCO FA. It was built in September 1945, and the total production run included 2 cab A units, and a single B (cabless) unit. The locomotives were powered by a V12 ALCO 241 diesel engine, rated at 1500 hp (1,100 kW). The locomotive could attain a top speed of 80 mph (Freight) and 125 mph (Passenger).[2] With the B-B wheel arrangement and carbody construction, these experimental units hinted at the FA units to come.

The three units were numbered 1500A, B, C and were tested on the New York Central Railroad, the Delaware and Hudson Railroad, the New York, New Haven and Hartford Railroad, and the Bangor and Aroostook Railroad,[3] among others. They were scrapped in September 1947.[1]


  1. 1.0 1.1 Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, WI: Kalmbach Publishing Co.. ISBN 0-89024-026-4. 
  2. Alco "Black Marias". The Diesel Shop. Retrieved on 2006-12-01.
  3. Brian Solomon (2000). American Diesel Locomotives. MBI, 83. ISBN 0-7603-0666-4. 

External links

Diesel-electric locomotives built by ALCO
Switchers: HH series, S-1, S-2, S-3, S-4, S-5, S-6, T-6, SSB-9
RS series: RS-1, RS-2, RS-3, RS-11, RS-27, RS-32, RS-36
RSC series: RSC-2, RSC-3
RSD series: RSD-1, RSD-4, RSD-5, RSD-7, RSD-12, RSD-15
Cab units: DL-103b, DL-105, DL-107, DL-109, DL-110, DL-203, FA, FB, PA, PB
Century series: C415, C420, C424, C425, C430, C628, C630, C636, C855
Diesel-hydraulics: DH643