Santa Fe 3751

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Santa Fe 3751
No. 3751 preparing to leave the Amtrak L.A. maintenance yard on July 14, 2017
Type and origin Power type Steam Builder Baldwin Locomotive Works Serial number 60004 Model 16-54 1/4 E Build date May 1927 Rebuild date 1941
Specifications Configuration: ​  • Whyte 4-8-4  • UIC 2′D2′ h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 80 in (2,032 mm) Axle load 73,000 lb (33,100 kg) (Originally 70,500 lb (32,000 kg)) Adhesive weight 287,000 lb (130,000 kg) (Originally 270,000 lb (122,000 kg) Loco weight 478,100 lb (216,900 kg) Tender weight 396,246 lb (179,730 kg) Total weight 874,346 lb (396,600 kg) Fuel type New: Coal Now: Oil Fuel capacity 7,101 US gal (26,880 L; 5,913 imp gal) Water cap. 20,000 US gal (76,000 L; 17,000 imp gal) Boiler pressure 230 psi (1.59 MPa), originally 210 psi (1.45 MPa) Feedwater heater Worthington Type 6-SA Cylinders Two, outside Cylinder size 30 in × 30 in (762 mm × 762 mm) Valve gear Walschaerts
Performance figures Maximum speed Over 100 mph (160 km/h) Power output As built: 3,220 hp (2,400 kW) Tractive effort 65,981 lbf (293.50 kN) Factor of adh. 4.35
Career Operators Santa Fe (1927 to 1958)→(1991 to 1996)→BNSF (1996–present) San Bernardino Railroad Historical Society Class 3751 Number in class 1 of 14 Numbers ATSF 3751 Retired August 23, 1953 Preserved May 14, 1958 Restored August 13, 1991 Current owner San Bernardino Railroad Historical Society Disposition Operational
References:[1]
Atchison, Topeka and Santa Fe Railway Steam Locomotive No. 3751
U.S. National Register of Historic Places
ATSF 3751 Show map of the Los Angeles metropolitan area ATSF 3751 Show map of California ATSF 3751 Show map of the United States
Location	2435 E. Washington Blvd., Los Angeles
Coordinates	34°1′9.10″N 118°13′31.7″W / 34.0191944°N 118.225472°W / 34.0191944; -118.225472
Built	1927
Architect	Atchison, Topeka and Santa Fe Railway; Baldwin Locomotive Works
NRHP reference No.	00001178[2]
Added to NRHP	October 4, 2000

Atchison, Topeka and Santa Fe 3751 is a 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 in 1953.

The locomotive was then placed on display in San Bernardino until it was restored to operating condition in 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 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.