19971012 01 CN Lacrosse, WI (6112221596)

The EMD SD75M and EMD SD75I are a series of similar

diesel-electric locomotive A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving whee ...

s produced by General Motors Electro-Motive Division between 1994 and 1996. The series was a response to

General Electric General Electric Company (GE) is an American multinational conglomerate founded in 1892, and incorporated in New York state and headquartered in Boston. The company operated in sectors including healthcare, aviation, power, renewable energ ...

's Dash 9-44CW. By increasing the output of the 16-710-G3 engine from , 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 "I" model has an "Isolated Cab", or a "WhisperCab" in EMD speak, which reduces noise and vibration in the cab. This type of cab is recognized by a seam separating the nose and cab components. This seam is the rubber that damps vibration and cuts down on noise, because the cab is not attached directly to the frame on the unit. This was the last model that used the "I" designation in the model name; all further units had the isolated cab, but the model designation continued to use the "M". Buyers included

Canadian National The Canadian National Railway Company (french: Compagnie des chemins de fer nationaux du Canada) is a Canadian Class I freight railway headquartered in Montreal, Quebec, which serves Canada and the Midwestern and Southern United States. CN ...

, the largest buyer with 175 units (now 173), Burlington Northern Santa Fe with 26 (now 24), and

Ontario Northland Railway The Ontario Northland Railway is a Canadian railway operated by the Ontario Northland Transportation Commission, a provincial Crown agency of the government of Ontario. Originally built to develop the Lake Timiskaming and Lake Nipissing a ...

with 6 (now 5). Both models use the HTCR radial truck and are mounted on the frame. This M 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 The Atchison, Topeka and Santa Fe Railway , often referred to as the Santa Fe or AT&SF, was one of the larger railroads in the United States. The railroad was chartered in February 1859 to serve the cities of Atchison and Topeka, Kansas, and S ...

, 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 last new unit, number 250, built in August 1995. Mainly built for a special request from Santa Fe/BNSF, the SD75Ms are slightly more powerful than SD70Ms, having horsepower ratings between & 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 The Norfolk Southern Railway is a Class I freight railroad in the United States formed in 1982 with the merger of Norfolk and Western Railway and Southern Railway. With headquarters in Atlanta, the company operates 19,420 route miles (31, ...

purchased 7 SD75Ms via

National Railway Equipment Company National Railway Equipment Company is an American railroad equipment rebuilding, leasing, and manufacturing company, headquartered in Mt. Vernon, Illinois. NREC sells new and rebuilt locomotives to railroad companies worldwide, with an emphasi ...

SD75M operators

SD75I Operators

SD75I gallery

image:BNSF 8287 EMD SD75I.jpg, BNSF #8287 image:CN5800 Dacotah,MB.png, CN #5800

References

External links

Locomotive Truck EMD HTCR
{{Santa Fe "Super Fleet" SD75M C-C locomotives Diesel-electric locomotives of the United States Freight locomotives