EMD SD40T-2

EMD SD40T-2

SP 8238, eastbound at Caliente, California, in the late 1980s

Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division Build date June 1974 – July 1980 Total produced 312

Specifications AAR wheel arr C-C Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Length 70 ft 8 in (21.54 m) Fuel capacity Prime mover EMD 645E3 Engine type V16 diesel Cylinders 16

Performance figures Power output Tractive effort 409 kN (92,000 lbf) (starting) 365 kN (82,000 lbf) (continuous)

Career Operators Southern Pacific (and Cotton Belt), Rio Grande, Union Pacific Nicknames "tunnel motors" Locale western United States Disposition most still in service as of 2010

An SD40T-2 is a 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division having a 16-cylinder EMD 645E3 diesel engine producing . 312 SD40T-2s were built for North American railroads between April 1974 and July 1980. This locomotive and the SD45T-2 are popularly called tunnel motors, but EMD's term is SD40-2s with "cooling system modifications" because they were designed for better engine cooling in tunnels. The difference between this locomotive and its non-tunnel motor cousin, the SD40-2, are the radiator intakes and radiator fan grills located at the rear of the locomotive. The radiator air intakes in this model were along the deck to allow more fresh, cooler air to enter and less hot exhaust fumes lingering around the tunnel's ceiling.

EMD SD45T-2 vs SD40T-2 radiator fan motor access doors

This locomotive model was purchased by the Denver and Rio Grande Western Railroad, the Southern Pacific Railroad, and its subsidiary Cotton Belt. Southern Pacific's version has a fuel tank and is 70 feet 8 inches (21.54 m) long. Rio Grande's version has a smaller fuel tank. After merging with Rio Grande, the Southern Pacific and later Union Pacific owned every SD40T-2.

In 2005, most of these units were owned by Union Pacific or leasing companies. By 2008, none were left in service on UP with SP or DRGW reporting marks. DRGW 5371 was the last one, retired in March 2008, and now resides at the Utah State Railroad Museum in Ogden Utah. Another SD40T-2 is preserved at the Boone & Scenic Valley Railroad in Boone, Iowa. UP still runs a few units repainted in its own livery.

Original purchasers

Railroad	Quantity	Road numbers	Notes
Denver and Rio Grande Western Railroad	73	5341-5413	All with 81 in. or 88 in. short noses.
St. Louis Southwestern Railway ( Cotton Belt)	10	8322-8326, 8372-8376	"snoot noses"
Southern Pacific Railroad	229	8230-8299, 8300-8321, 8327-8341 8350-8371, 8377-8391, 8489-8573	8300 series featured extended "snoot" noses for radio control equipment.

Other owners

Railroad	Quantity	Road numbers	Notes
Alabama & Tennessee River	3	2832, 2842, & 5387	2832 & 2842 still in UP yellow. 5387 still in "Bloody nose" paint lost speed lettering as of 5-10-11
America Latina Logistica
Fort Worth and Western Railroad	3	2015-2017, 3252
Buffalo & Pittsburgh	2	3301 & 3302	Both still in KCS Grey
Ferrovia Centro Atlântico (Brazil)			Rebuilt as 1,000 mm (3 ft 3 3⁄8 in) metre gauge BB40T-2s
GECX
HLMX
Indiana & Ohio	3	IORY 4070, 4071, and 4072	All wear RailAmerica red and gray
Kansas City Southern			Rebuilt as SD40-3s
LTEX
MNA (Missouri & Northern Arkansas Railroad)
NREX
New York Susquahanna & Western	4	3010, 3014, (3012 and 3016 have been rebuilt into SD33ECO's)	All units wear Susquehanna "Yellow Jacket" paint. 3014 has "snoot" nose, all others have 88 in (2.24 m) noses.
OHCR
Respondek Rail Corporation (Squaw Creek Southern Railroad)	1	8795	Sold to WE	Former UP 8795 & SP 8246
R.J. Corman	9	5353, 5361, 5372, 5409, 8307, 8336, 8569, 8718, 8861
Terminal Railroad Association (TRRA)		3001,3005
Union Pacific			Most if not all Retired by now
Wheeling & Lake Erie	2	5391, 5413, 8795	WE 5391 and 5413 are still in D&RGW paint, WE 8795 wears UP colors, Ex-Squaw Creek
Independent Locomotive Service (ILSX)	1	1343	Former UP 2906, UP 4429, & SP 8371

External links

• EMD SD40T-2's at rrpicturearchives.net

fi:EMD SD40#EMD SD40T-2