| Santa Fe 3751 |
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No. 3751 preparing to leave the Amtrak L.A. maintenance yard on July 14, 2017 |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-4 |
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| • UIC | 2′D2′ h2 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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| Driver dia. | 80 in (2,032 mm) (Originally 73 in (1,900 mm) |
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| Axle load | 73,000 lb (33,100 kg) (Originally 70,500 lb (32,000 kg)) |
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| Adhesive weight | 287,000 lb (130,000 kg) (Originally 270,000 lb (122,000 kg) |
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| Loco weight | 478,100 lb (216,900 kg) |
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| Tender weight | 396,246 lb (179,730 kg) |
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| Total weight | 874,346 lb (396,600 kg) |
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| Fuel type | New: Coal
Now: Oil |
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| Fuel capacity | 7,101 US gal (26,880 L; 5,913 imp gal) |
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| Water cap. | 20,000 US gal (76,000 L; 17,000 imp gal) |
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| Boiler pressure | 230 psi (1.59 MPa), originally 210 psi (1.45 MPa) |
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| Feedwater heater | Worthington Type 6-SA |
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| Cylinders | Two, outside |
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| Cylinder size | 30 in × 30 in (762 mm × 762 mm) |
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| Valve gear | Walschaerts |
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| Performance figures |
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| Maximum speed | Over 100 mph (160 km/h) |
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| Power output | As built: 3,220 hp (2,400 kW) |
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| Tractive effort | 65,981 lbf (293.50 kN) |
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| Factor of adh. | 4.35 |
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| Career |
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| Operators | Santa Fe (1927 to 1958)→(1991 to 1996)→BNSF (1996–present)
San Bernardino Railroad Historical Society |
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| Class | 3751 |
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| Number in class | 1 of 14 |
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| Numbers | |
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| Retired | August 23, 1953 |
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| Preserved | May 14, 1958 |
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| Restored | August 13, 1991 |
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| Current owner | San Bernardino Railroad Historical Society |
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| Disposition | Operational |
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| References:
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Atchison, Topeka and Santa Fe Railway Steam Locomotive No. 3751 |
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Show map of the Los Angeles metropolitan area Show map of the United States |
| Location | 2435 E. Washington Blvd., Los Angeles |
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| Coordinates | 34°1′9.10″N 118°13′31.7″W / 34.0191944°N 118.225472°W / 34.0191944; -118.225472 |
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| Built | 1927 |
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| Architect | Atchison, Topeka and Santa Fe Railway; Baldwin Locomotive Works |
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| NRHP reference No. | 00001178 |
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| Added to NRHP | October 4, 2000 |
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Atchison, Topeka and Santa Fe 3751 is a preserved class "3751" 4-8-4 "Heavy Mountain" type steam locomotive built in May 1927 by the Baldwin Locomotive Works in Eddystone (Philadelphia), Pennsylvania for the Atchison, Topeka & Santa Fe Railway (ATSF). No. 3751 was the first 4-8-4 steam locomotive built for the Santa Fe and was referenced in documentation as type: "Heavy Mountain", "New Mountain", or "Mountain 4-wheel trailer". No. 3751 served in passenger duties until being retired on August 23, 1953.
The locomotive was then placed on display in San Bernardino until it was restored to operating condition on August 13, 1991. It is currently located in the Central City East neighborhood of Los Angeles and has been listed on the National Register of Historic Places since October 4, 2000. It holds the distinction of being the oldest surviving 4-8-4 type steam locomotive in the world.
The locomotive is currently owned and operated by the San Bernardino Railroad Historical Society, which uses the locomotive to haul occasional mainline excursion trains. However, a federally mandated 15-year inspection put it out of service in 2017. No. 3751's overhaul was completed in September 2022, and it returned to service that month.
