EMD SD75M

The EMD SD75M is a series of road switcher diesel-electric locomotives produced by General Motors Electro-Motive Division between 1994 and 1996. The series was a response to General Electric's Dash 9-44CW. By increasing the output of the 16-710-G3 engine from 4,000 to 4,300 horsepower (3,000 to 3,200 kW), the SD75 was a reality. The "M" in the model designation is the style of the cab, in this case the North American style cab. The SD75I has an "Isolated Cab", or a "WhisperCab" in EMD speak, which reduces noise and vibration in the cab. Both models use the HTCR radial truck and are mounted on the 72-foot-4-inch (22.05 m) frame. This model only sold 76 units and was not as popular as the SD70. The biggest buyer of this model was the Atchison, Topeka and Santa Fe Railway, now Burlington Northern Santa Fe, with 51 units; an additional 25 were delivered in early 1996, during the merger process. The Santa Fe's SD75Ms were the railroad's last new locomotives, with the very last new unit, number 250, built in August 1995.[2]

EMD SD75M
Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division (EMD) Model SD75M Build date 1994 – 1996 Total produced 76
Specifications Configuration: ​  • AAR C-C Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Prime mover EMD 16-710-G3 Cylinders 16 Transmission diesel electric
Performance figures Power output 4,300 horsepower (3,200 kW)
Career Operators Burlington Northern Santa Fe[1] Numbers BNSF 200–201, 203–208, 210–217, 219–221, 223–224, 226–228, 231–275, renumbered from 8200–8275. NS 2800–2806. Disposition In service as of 2014

Mainly built for a special request from Santa Fe/BNSF, the SD75Ms are slightly more powerful than SD70Ms, having horsepower ratings between 4,300 hp (3,200 kW) & 4500 hp. They are almost identical to SD70Ms, but can be distinguished by the added bulge below the inertial air-intake on the right side of the unit.

In September 2014, Norfolk Southern purchased 7 SD75Ms via National Railway Equipment Company.[3]

Current and Former operators

Railroad	Quantity	Road Numbers	Notes
Atchison, Topeka and Santa Fe Railway	51	200–250	To BNSF 8200–8250, then back to 200–250. Units 202, 209, 218, 222, 225, 229, and 230 to Norfolk Southern 2800–2806. Rest sold to PRLX.
BNSF Railway	25	8251–8275	Renumbered to 251–275.

References

1. The Diesel Shop, http://www.thedieselshop.us/, Burlington Northern Santa Fe Roster
2. Brian Solomon (7 October 2013). Classic Locomotives: Steam and Diesel Power in 700 Photographs. MBI Publishing Company. p. 480. ISBN 978-1-61058-868-3.
3. http://www.nsdash9.com/rosters/2800.html

External links

Media related to EMD SD75M locomotives at Wikimedia Commons