The SD45T-2 is a model of diesel-electric locomotive built by EMD for the Southern Pacific Railroad. Like the later SD40T-2 it is colloquially nicknamed a tunnel motor. 247 total units (including the original EMD/SP joint venture working Prototype) were produced from February 1972 to June 1975, including 84 for SP's subsidiary Cotton Belt. From April 1986 to December 1989, 126 were rebuilt and re-designated as SD45T-2R, including 24 for Cotton Belt.
The SD45T-2 is a variant of the venerable SD45 that featured the "Dash 2" upgrade components such as improved electronics and high traction trucks, with the "T" denoting its cooling system modifications. The intake for radiator cooling air was moved to the walkway level and the cooling fans themselves were under the radiator cores, instead of above. Tunnel motors were built for mountainous areas in the western United States, where SP had previously encountered repeated overheating issues on their SD45s.
The later SD40T-2 looks similar to the SD45T-2. One spotting difference is the longer hood on the SD45T-2 to accommodate the V20 prime mover vs. the V16 used on the SD40T-2. The SD45T-2's cab is further forward on the frame, so there is less "front porch". This mimics the differences between the SD45-2 and the SD40-2. Another spotting difference is the SD45T-2's three fan access doors on each side above the cooling air intake, while the SD40T-2 has two.
EMD SD45T-2 vs SD40T-2 radiator fan motor access doors
Some SD45T-2s were rebuilt and designated to SD45T-3, SD40T-3 and SD40-2T. In addition, some locomotive leasing companies own the SD45 tunnel motor locomotives. They are scattered all over the United States and are an increasingly rare sight.
Richard Percy. ESPEE MODELERS ARCHIVE [2]. Added May 19, 2018
Guss, Chris (March 2016). "Tunnel (motors) from the past". Trains Magazine. Retrieved 7 February 2019.
External links
Media related to EMD SD45T-2 locomotives at Wikimedia Commons
January 06, 2023
sd45t, this, article, unclear, citation, style, references, used, made, clearer, with, different, consistent, style, citation, footnoting, december, 2019, learn, when, remove, this, template, message, sd45t, model, diesel, electric, locomotive, built, southern. This article has an unclear citation style The references used may be made clearer with a different or consistent style of citation and footnoting December 2019 Learn how and when to remove this template message The SD45T 2 is a model of diesel electric locomotive built by EMD for the Southern Pacific Railroad Like the later SD40T 2 it is colloquially nicknamed a tunnel motor 247 total units including the original EMD SP joint venture working Prototype were produced from February 1972 to June 1975 including 84 for SP s subsidiary Cotton Belt From April 1986 to December 1989 126 were rebuilt and re designated as SD45T 2R including 24 for Cotton Belt EMD SD45T 2Indiana and Ohio Railroad 4504 still in Southern Pacific colorsType and originPower typeDiesel electricBuilderGeneral Motors Electro Motive Division EMD ModelSD45T 2Build dateFebruary 1972 June 1975Total produced247SpecificationsConfiguration AARC CGauge4 ft 8 1 2 in 1 435 mm standard gaugeLength70 ft 8 in 21 54 m Fuel capacity4 400 US gal 16 700 l 3 660 imp gal Prime moverEMD 645E3Engine typeV20 diesel engineCylinders20Performance figuresPower output3 600 hp 2 680 kW CareerNicknames tunnel motor Dispositionmany still in service as of 2010 one donated to California State Railroad MuseumThe SD45T 2 is a variant of the venerable SD45 that featured the Dash 2 upgrade components such as improved electronics and high traction trucks with the T denoting its cooling system modifications The intake for radiator cooling air was moved to the walkway level and the cooling fans themselves were under the radiator cores instead of above Tunnel motors were built for mountainous areas in the western United States where SP had previously encountered repeated overheating issues on their SD45s The later SD40T 2 looks similar to the SD45T 2 One spotting difference is the longer hood on the SD45T 2 to accommodate the V20 prime mover vs the V16 used on the SD40T 2 The SD45T 2 s cab is further forward on the frame so there is less front porch This mimics the differences between the SD45 2 and the SD40 2 Another spotting difference is the SD45T 2 s three fan access doors on each side above the cooling air intake while the SD40T 2 has two EMD SD45T 2 vs SD40T 2 radiator fan motor access doors Like their SD40T 2 some of SP s SD45T 2 tunnel motors were obtained by Kansas City Southern Railway Bessemer and Lake Erie Railroad Duluth Missabe and Iron Range Railway and by the Union Pacific Railroad when it merged the SP in 1996 Some SD45T 2s were rebuilt and designated to SD45T 3 SD40T 3 and SD40 2T In addition some locomotive leasing companies own the SD45 tunnel motor locomotives They are scattered all over the United States and are an increasingly rare sight Contents 1 Original owners 2 Preservation 3 References 4 External linksOriginal owners EditRailroad Number of engines Roster numbers NotesSouthern Pacific 163 9166 9260 9302 9370 1 SP 9314 is the rebuild of the wrecked SP 9220 9340 was wrecked in the 1989 Cajon Pass Runaway and scrapped St Louis Southwestern Cotton Belt 84 9157 9165 9261 9301 9371 9404 1 SSW 9389 was the 600th 45 Series unit delivered to the Southern Pacific System by EMD and wore Bicentennial colorsPreservation EditSouthern Pacific 6819 originally 9193 was donated by SP successor Union Pacific Railroad to the California State Railroad Museum in December 2001 2 References Edit a b Wilson Jeff 2017 Guide to North American Diesel Locomotives Kalmbach Books p 82 ISBN 978 1 62700 455 8 Master Railroad Equipment Roster PDF California State Railroad Museum September 10 2020 Retrieved November 5 2022 Sarberenyi Robert EMD SD45T 2 Original Owners Retrieved on August 27 2006 American Rails com 1 Added May 19 2018 Richard Percy ESPEE MODELERS ARCHIVE 2 Added May 19 2018 Guss Chris March 2016 Tunnel motors from the past Trains Magazine Retrieved 7 February 2019 External links Edit Media related to EMD SD45T 2 locomotives at Wikimedia Commons Retrieved from https en wikipedia org w index php title EMD SD45T 2 amp oldid 1121187117, wikipedia, wiki, book, books, library,
