The Baldwin VO-660 was a diesel-electric switcher locomotive built by Baldwin Locomotive Works between April, 1939 and May, 1946. The 197,520–203,980 lb (89,600–92,500 kg) units were powered by a six-cylinder diesel engine rated at 660 horsepower (492 kW), and rode on two-axle AAR Type-A switcher trucks in a B-B wheel arrangement. 142 examples of this model were built for American railroads, along with the United States Navy. Baldwin replaced the VO-660 with the model DS-4-4-660 in 1946.

In the early 1960s the Reading Company sent all 10 of their VO-660s to General Motors Electro-Motive Division to have them rebuilt to SW900 specifications. These locomotives received new frames, cabs, and carbodies, and reused only the trucks and batteries from the VO-660's.

Units produced Railroad   Quantity   Road numbers NotesBaldwin Locomotive Works (pre-production units) 1 299 Used as BLW plant switcher1 62300 to Reading 60Baldwin Locomotive Works (demonstrator) 1 335 first production VO-660; to Standard Steel Division of Baldwin Locomotive Works 12, to Altoona Railroaders Museum, to SMS Rail Lines, under restoration to active service1 336 to Elgin, Joliet and Eastern 2701 337 to Central of Georgia RailwayAkron and Barberton Belt Railroad 1 25 American Smelting and Refining Company (ASARCO) 4 1950–1953 American Steel and Wire Company 3 1, 11, 23-1 Basic Magnesium, Inc. 1 1000 Central Railroad of New Jersey 4 1040–1043 Chicago and Eastern Illinois Railroad 1 110 Chicago and North Western Railway 10 1237–1246 Chicago, Milwaukee, St. Paul and Pacific Railroad (“Milwaukee Road”) 1 1649 Renumbered 1635, later renumbered 985Chicago, St. Paul, Minneapolis and Omaha Railway (“Omaha Road”) 3 58, 59, 68 Denver and Rio Grande Western Railroad 9 66–74 Elgin, Joliet and Eastern Railway 2 271, 272 Francisco Sugar Company, (Cuba) 1 45 Iowa Ordnance Plant 1 2-100 to US War Dept 7276Kansas City Southern Railway 1 1150 La Salle and Bureau County Railroad 1 6 Long Island Rail Road 1 403 Louisville and Nashville Railroad 4 20–23 Minneapolis, Northfield and Southern Railway 1 600 Renumbered 60Minnesota Western Railway 1 1 to MNS 1Missouri Pacific Railroad 4 9009, 9010, 9012, 9026 Nashville, Chattanooga and St. Louis Railway 1 10 New Orleans Public Belt Railroad 3 41–43 New York Central Railroad 12 501–502, 752–761 501–502 renumbered 750–751Northern Pacific Railway 3 128–130 Renumbered 650–652Patapsco and Back Rivers Railroad 3 63–65 Renumbered 301–303Pennsylvania Railroad 12 5907–5909, 5932–5937, 5941–5943 Procter and Gamble 1 125 Used at Port Ivory, Staten Island, NYReading Company 10 61–70 St. Louis-San Francisco Railway 2 600–601 Seaboard Air Line Railroad 1 1202 Singer Manufacturing Company 1 2 To Pickens #2Southern Pacific Company 2 1021–1022 Southern Railway 1 DS2005 Terminal Railroad Association of St. Louis 4 531–534 Union Terminal Railway of Memphis (Missouri Pacific Railroad) 2 9090–9091 United States Navy 6 10, 11, 15, 16, 18, 31 Upper Merion and Plymouth Railroad 2 51–52 Wabash Railroad 1 200 Warner Company 1 11 to New Hope & Ivyland 395, to SMS Rail Lines 11; under restorationWestern Maryland Railway 4 101, 103–105 Westinghouse Electric and Manufacturing Company 1 10 Wyandotte Terminal Railroad 3 101–103 Youngstown Sheet and Tube 8 600–607 Total 143

Surviving Units Only four intact examples of the VO-660 are known to survive today.

• Baldwin 335, the first production VO-660, is owned by SMS Lines and is under restoration to active service.

• Singer Manufacturing #2 is preserved as Pickens #2 at the AnMed Health Cannon Marketplace Pavillion in Pickens, South Carolina.

• Warner #11 is owned by SMS Lines and is under restoration to active service.

• Wyandotte Terminal 103 is preserved at the Illinois Railway Museum in Union, Illinois.

References

External links Baldwin VO-660 Roster BLW Demonstrators, Prototypes and Test Beds CKD Praha 6S310DR diesel engine, and the Baldwin VO and 600 series engines Existing Baldwin VO Model Units Preserved Baldwin and Lima Locomotives PRR Diesel Locomotive diagrams: Baldwin VO-660 VO-660 — Original Owners Illinois Railway Museum roster page for Wyandotte Terminal 103