EMD SD90MAC

Source: Wikipedia, the free encyclopedia.

EMD SD90MAC and SD9043MAC
16-265H
RPM range225-1,000 rpm
Engine typeV16 diesel
Traction motors6 Siemens 1TB2830 AC motors
Cylinders16
Cylinder size10.45 in × 11.80 in (265 mm × 300 mm)
Performance figures
Maximum speed70 mph (113 km/h)
Power output
  • SD9043MAC: 4,300 hp (3,210 kW)
  • SD90MAC: 6,000 hp (4,470 kW)
Tractive effortsmall engine (SD9043MAC) : 185,000 lbf (820 kN) starting, 147,000 lbf (650 kN) continuous
large engine (SD90MAC-H and SD90MAC-H2) : 200,000 lbf (890 kN) starting, 165,000 lbf (730 kN) continuous

The EMD SD90MAC is a model of 6,000 

diesel-electric locomotive produced by General Motors Electro-Motive Division (EMD). It is, with the SD80MAC, one of the largest single-engined locomotives produced by EMD, surpassed only by the dual-engined DDA40X
.

The SD9043MAC is the 4,300 

H-engine's
issues. However, the accompanying upgrade program was never utilized by its customers.

The SD90MAC's features include

SD70M-2
, has a wide radiator section, nearly the entire width of the locomotive, which along with their size makes them easy to spot.

As of 2019, some SD90MACs are still in service on the Union Pacific. Norfolk Southern had rostered 110 SD90MAC locomotives purchased or traded from Union Pacific or the CIT Group respectively, that have now all been rebuilt as

EMD SD70ACU
locomotives. Canadian Pacific has also opted to convert their small fleet of long-stored SD90MACs into SD70ACUs as well.

History

Union Pacific
SD9043MAC locomotive No. 8027

The SD90MAC was introduced in 1995, along with the

16-cylinder H-engine, while the SD80MAC was designed to use the 20-cylinder version of the existing 710G engine. However, technical problems with the 6,000 horsepower (4,500 kW) engine resulted in the first locomotives being shipped with 4,300 hp (3,210 kW) 16-cylinder 710G engines, making them similar to the SD70MAC's. These locomotives were informally designated SD9043MAC by railroads that purchased them with the option to re-engine them with 6,000 hp (4,470 kW) engines when they became available.[2] This upgrade program, however, was never taken advantage of by SD90MAC buyers due to reliability issues with the newer engine. Over 400 SD90MAC locomotives fitted with the 4,300 hp
(3,210 kW) 710 engine were built.

In 1996,

Canadian Pacific
locomotives were part of an earlier order for 710-engine equipped SD90MAC locomotives that was still in production when Electro-Motive Diesel switched over to the H-engine.

Electro-Motive Diesel also tried offering a lower-power version of the SD90MAC with a 12-cylinder engine called the SD89MAC, but none were produced other than the prototype.

Specifications

Norfolk Southern Railway 7332 in Ohio

Prime mover (EMD 710):

  • EMD V16 710G3C-T1
  • Power Output - 4,300 hp or 3,210 kW
  • Idle - 200 rpm
  • Full Speed - 950 rpm

Prime mover (EMD 265):

  • EMD
    EMD GM16V265
  • Power Output - 6,000 hp or 4,470 kW at 1,000 rpm
  • Idle - 200 rpm
  • Full speed - 1,000 rpm

Traction motors:

  • 6 Siemens 1TB2830 AC motors mounted 3 each on 2 HTCR-2 radial self-steering trucks.
  • Rated output - 855 hp or 638 kW
  • Gearing - 83:16
  • Wheel size - 45 in (1,143 mm)
  • Max revolutions - 3,435 rpm
  • Starting torque - 16,300 N⋅m or 12,022 lbf⋅ft
  • Continuous torque - 12,900 N⋅m or 9,515 lbf⋅ft
  • Maximum voltage - 2,183 V

Performance (parenthesis indicate H-Engine equipped specifications):

  • Maximum speed - 70 mph (113 km/h)
  • Starting tractive effort - 185,000 lbf (820 kN) and 200,000 lbf (890 kN))
  • Continuous tractive effort - 147,000 lbf (650 kN) and 165,000 lbf (730 kN))
  • Braking effort - 115,000 lbf (510 kN)[3]
  • Weight - 210 short tons (188 long tons; 191 t)/420,000 lb or 190,500 kg[4]

Fleet rosters

Canadian Pacific

SD70ACU
.

CEFX

  • 100-139 (SD9043MAC) (Lease Fleet) 10 units traded to Norfolk Southern for 15 MP15DCs.

EMLX

Indiana Rail Road

  • 9001-9013, 9025 (SD9043MAC) (Long-term lease from CEFX). All to be retired.[7][8]

Norfolk Southern

  • 7229-7338 (SD9043MAC); NS purchased 100 units in September 2014 from EMD/Progress Rail. Those units are ex-UP. 10 units were acquired from CEFX in June 2016, in exchange for 15 MP15DCs. All units have been converted to
    SD70ACUs
    .

Union Pacific
:

  • 8000-8308 (SD9043MAC); most of them were renumbered 3470-3775 to make room for new
    SD70ACU
    rebuilds; in September 2014, Norfolk Southern purchased 100 of these and in 2019 and 2021 Canadian Pacific purchased 42 of these in total.
  • 8500-8561 (SD90MAC-H. Fleet Retired, some after less than 5 years of service. 8500, 8523-8561 to EMLX Lease fleet, 8501-8522 renumbered 8911-8931. Retired in late 2008-2009. Sold to Metro East Industries in Alorton, Illinois. Scrapped mid to late 2009.

Fortescue Metals Group

  • 901-904 (SD90MAC-H)
  • 905-909 (SD9043MAC): Rebuilt from SD90MAC-H for use in Australia at the
    Juniata Shops
  • 910-917 (SD90MAC-PII): Rebuilt for use in Australia at
    Mayfield, KY
    shop

Current status

Norfolk Southern Railway SD70ACU No. 7305. The SD70ACU is part of Norfolk Southern's SD90MAC rebuild program.

As of January 2005, the SD90MAC is no longer in production due to the

Dalian Locomotive Works
. These units were reportedly capable of meeting the EPA's strict regulations and began delivery in the latter half of 2007.

Due to reliability issues, FMG units 910 to 917 are stored and deemed not be used. They were purchased to be used as "slave" units, and they were more offline than they were in use. FMG is looking to fit 910-917 to the same specifications as 901-909. 916 is currently in the shop.

On 1 August 2008, Union Pacific Railroad announced that it would be retiring 21 of the SD90MAC locomotives. Common parts will be used to maintain the railroad's 710-engined SD90MAC fleet. The 265H prime mover will be cut up or exported. The only part that is not reusable is the frame. These units, in the 8900 series will be removed from storage in Denver, and will be sent to

East St. Louis
, Ill., in small batches to be dismantled. As of 2019, Union Pacific still operates some of the remaining SD9043MACs, which sport new numbers and UP wings on the cab. These units take the original road numbers of the Union Pacific's original SD40-2 fleet.

UP 3567, an SD9043MAC still in regular service in 2019

Canadian Pacific's SD90MAC-H locomotives 9300-9303 (listed as SD90MAC6000s) were up for tendered sale in 2009. The bidding ended 31 March 2010. While they were originally thought to be shipped overseas, they were eventually moved to Quebec for scrapping.

Canadian Pacific's SD90MAC locomotives, numbered in the 9100-9160 series had been in long term storage in Winnipeg, Manitoba, for much of the 2010 decade. Three units, the 9129, 9133 and 9138, were in November 2012 due to errors in preparing them for long term storage. The entire fleet had been put up for sale in November 2012 and again in January 2013 with no offers being received. These units remained stored until the winter of 2018 when at first 30, then all 58 remaining units entered a rebuild program to be converted into SD70ACUs. In 2021, Canadian Pacific purchased 40 more SD90MACs from the Union Pacific for further rebuilding into SD70ACU engines.

In September 2014, Norfolk Southern purchased 100 4300 hp SD9043MACs from Union Pacific with the intent to rebuild them into

Juniata Shops. The last 4 SD90MACs were taken delivery by Norfolk Southern on October 3, 2015, running parallel to Western Avenue in Chicago
, IL.

In 2015,

Brookville Equipment Corporation performed the conversion. The rebuild was designated HTL4200AC. The locomotive, numbered CECX No. 1919, had been Union Pacific No. 8559.[9]

See also

  • GE AC6000CW A similarly powerful locomotive built by GE that entered production soon after the SD90MAC.
  • China Railways HXN3

References

  1. ^ "Gm Emd: Sd90Mac". www.gmemd.com. Archived from the original on 10 December 2001. Retrieved 12 January 2022.
  2. ^
    ISBN 0-06-081895-6
    .
  3. ^ Shop, The Diesel. "EMD SD90MAC Data Sheet". The Diasel Shop. The Diesel Shop. Retrieved 13 August 2017.
  4. ^ http://www.sze.hu/~szenasy/VILLVONT/Diesel-Electric_Loco_SD90MAC_EN.pdf [bare URL PDF]
  5. ^ "Progress Rail to upgrade CP units". 26 June 2018.
  6. ISBN 9781921719554
    .
  7. ^ wrp_admin (16 March 2023). "Last Dance for Indiana Rail Road SD90MACs". Railfan & Railroad Magazine. Retrieved 17 August 2023.
  8. ^ says, Vincent Saunders (15 August 2023). "Indiana Rail Road's SD9043MACs are fading out". Trains. Retrieved 17 August 2023.
  9. ^ "Cummins Tier 4 freight locomotive headed to Indiana for testing". Trains. 10 November 2015. Retrieved 11 November 2015. (subscription required)
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