901 West Pratt St., Baltimore, MD 21223
Detailed Information

Name: B&O No. 7402
Other Numbers: CSX No. 4550
Railroad of Record: Baltimore & Ohio Railroad
Type of Locomotive: GM-EMD model SD-35, 2500 hp road freight locomotive
Builder No.: 29410
Manufacturer: General Motors Electro- Motive Division
Date Built: July 1964
Status: Operational

Locomotive Weight: 196 tons
Prime Mover: EMD V-16, model 567D3A (two cycle), 2500 hp
Starting Tractive Effort: 97,500 lbs.

The B&O No.7402 SD-35 was built by the General Motors, Electro-Motive Division (GM-EMD) in 1964. General Motors built 360 of these diesel locomotives between June 1964 and January 1966, 24 of which were purchased by the B&O in 1964.  The SD-35 had a 3000 gallon fuel tank and a boxy appearance with a short underframe.

The B&O SD-35s were assigned to helper service to push trains up the steep grades of the Allegheny Mountains until they were replaced with the SD-50s. The No. 7402 was eventually renumbered as No. 4550 by CSX and was stored at the Queensgate Yard in Cincinnati, Ohio after its retirement. When the Baltimore & Ohio Railroad Museum acquired the No. 4550, the locomotive was painted in the Chessie System paint scheme. In 1995, the No. 4550 was restored and repainted to its original livery and road number.


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