EMD SD60

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EMD SD60 series
EMD SD60 SOO 6022.jpg
Soo Line 6022 pulls a train through Wisconsin Dells, WI, 20 June 2004
Specifications
Power type Diesel-electric
Builder GM Electro-Motive Division (EMD)
General Motors Diesel (GMD)
Build date 1984–1995
Total produced 1,140
AAR wheel arr. C-C
Gauge 4 ft 8 12 in (1,435 mm)
5 ft 3 in (1,600 mm), Brazil
Prime mover EMD 16-710G3A
Alternator AR-11
Traction motors D-87
Power output 3,800 hp (2.8 MW)
Career
Operator(s) See original owners
Locale North America, Brazil
Disposition most still in service as of 2010

The EMD SD60 is a 3,800 horsepower (2,800 kW), 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division. Intended for heavy-duty drag freight or medium-speed freight service. It was introduced in 1984, and production ran until 1995.

History and development[edit]

The development of the SD50 and SD60 series locomotives in the late 1970s and early 1980s was spurred by the introduction of 3,600 horsepower (2,700 kW) GE B36-7 and GE C36-7 locomotives by EMD's main competitor General Electric. In 1980, the SD50 model was added to the EMD Catalog. However, the SD50's electrical reliability was poor and, similarly, the 3,500 horsepower (2,600 kW) 16-645F engine had poor mechanical reliability, both believed to be largely due to the 950 maximum rpm of the 645F prime mover. It was time to develop a replacement for the venerable 645 engine which, in its earlier 16-645E form, had proved to be exceptionally reliable. EMD therefore quickly commenced development of the SD60 series, which would eliminate the weaknesses of the SD50. The lessons learned in developing the 645F crankcase and crankshaft (for the earlier 20-645F, and the then-current 16-645F) were incorporated in the replacement, the 710G, first employed in the SD60. Although the carbody and frame are nearly indistinguishable from the earlier SD50, the SD60 featured the new 16-cylinder EMD 710G3A prime mover, AR-11 traction alternator, D-87 traction motors and a microprocessor-based control system that governed various electrical systems within the locomotive (e.g., wheel slip and transition).

The SD60 proved to be more reliable and fuel-efficient than the SD50, but it was not a resounding success in terms of regaining the market share that was lost due to the electrical and mechanical issues that plagued the earlier SD50. The goal was to equal or exceed the reliability of the earlier 645E-powered 3,000 horsepower (2,200 kW) SD40-2, which was an industry standard benchmark for reliability, in the new 710G-powered 3,800 horsepower (2,800 kW) SD60. This goal was largely achieved and the later 710G-powered 4,300 horsepower (3,200 kW) SD70M received what would be the largest single order for new locomotives, a 1,000 unit order from Union Pacific, (UP 4000 through 4999, inclusive), which was later extended by nearly 500 additional SD70M units (UP 3999 and below, and UP 5000 and above), and by nearly 1,000 additional units if UP's SD70M orders are included.

As an indication of its sound design, many SD60s are now being re-manufactured by their owners or by subcontractors for another 30 years of trouble-free service, 240 such units by Norfolk Southern alone, some of which will be acquired on the secondary market. These NS conversions are reported to be upgraded to include electronic fuel injection, intercooling, "crash-worthy" fuel tanks and other components and features found in late SD70s. Early units were completed at the original SD60's 3,800 HP rating, but all were later uprated to the SD70's 4,000 HP rating, thereby being for all intents and purposes the equivalent of a late SD70.

Models[edit]

EMD SD60I, CSX 8747, Plymouth, Michigan
EMD SD60M (Early model), UP 2317
EMD SD60M, EFC 602
GMD SD60F, CN 5536

Several variants of the SD60 were built, including:

SD60[edit]

This was the original model, and had a conventional hood unit configuration with the 40 Series (spartan) cab first employed on the SD40-2.

SD60F[edit]

The SD60F was ordered and is operated by Canadian National and has a full-width cowl body and crashworthy "safety cab" with a four-piece windshield.

SD60I[edit]

The SD60I model has a full-width short hood and features the so-called "WhisperCab" that was isolated from sound and vibration using a system of rubber gaskets. The same cab was later used on EMD's SD70I, SD75I, SD80MAC and SD90MAC locomotives. Only Conrail ordered this model, and all now belong to the Norfolk Southern Railway and CSX Transportation.

SD60M[edit]

The SD60M features a "North American safety cab" design and has a full-width short hood. Early models featured a three-piece windscreen with vertical windows (nicknamed "triclops") but later production used two windshield panes that were sloped back, and had a somewhat shorter nose. EMD's F59PH is based on the SD60M. Purchasers of this model included the Union Pacific Railroad, Burlington Northern Railroad and the Soo Line Railroad.

SD60MAC[edit]

The SD60MAC is similar to the SD60M but is equipped with alternating current traction motors. Although four demonstrator SD60MAC units tested on the Burlington Northern Railroad proved the viability of EMD's AC traction system, all subsequent orders were for the SD70MAC locomotive.

SD60E[edit]

The SD60E is a custom rebuilt SD60 for Norfolk Southern created at the Juniata Shops. So far, only standard SD60s have entered this rebuild program, which began in 2010. It is unknown at this time[when?] if SD60Is and SD60Ms will get this rebuild. The SD60E utilizes a new NS-designed "Crescent" cab with a wide short hood. The name Crescent comes from the Norfolk Southern Crescent Corridor which runs from Louisiana to New Jersey. Norfolk Southern bought additional SD60s from HLCX (Helm Financial Corporation) specifically for the SD60E program. Norfolk Southern plans to build 240 SD60Es.[1] Notable SD60Es include the NS 6920 "Veterans Unit," and the NS 6963 "GoRail Unit."[2]

Original owners[edit]

Railroad Qty. Road numbers Notes
EMD SD60 orders
Burlington Northern 3 8300-8302 Demonstrators owned by EMD but painted for BN; Now with CSX
Chicago & North Western 55 8001-8055 Built to SOO Line specifications; SOO was unable to take delivery due to financial conditions & the order was passed to C&NW
Conrail 25 6843-6867 After the 1999 Conrail split; 12 units went to CSX and were renumbered CSXT 8710-8721, 8790; 15 units went to NS and were renumbered NS 6702-6716
CSX Transportation 10 8700-8709
EMDX 4 1-4 Demonstrators; EMD 1,2,4 to CR 6840-6842; EMD 3 leased to BNSF as replacement for EMD 9041 (used at DOT, Pueblo, CO) EMD 3/9041 is now part of the Illinois Railway locomotive roster.
Kansas City Southern 46 714-759
Norfolk Southern 151 6550-6700 Slowly rebuilding their SD60s to SD60Es at Juniata Shops
Oakway 100 9000-9099 90 now owned by Canadian National. The NYSQ bought 6 in the summer of 2012. 4 are still owned by BNSF Railway
Soo Line 58 6000-6057 SOO 6000-6020 returned to leaser, Capital Finance (CIT Group) Former SOO 6021-6057/CP 6221-6257 have now been put up for sale.
Union Pacific 85 6000-6084 Renumbered UP 2155-2239 (except UP 6014, wrecked & scrapped)
EMD SD60F orders
Canadian National 64 5500-5563 5500-5503 are pre-production SD60F's, originally classified as SD50AF & built as CN 9900-9903. They look like SD50F's, but internally are SD60F's.
EMD SD60I orders
Conrail 80 5575-5654 After the 1999 Conrail split; 35 units went to CSX and were renumbered CSXT 8722-8755, 8774; 46 units went to NS and were renumbered NS 6717-6762
EMD SD60M orders
Burlington Northern 100 1991, 9200-9298 Renumbered BNSF 9200-9299, then renumbered BNSF 8100-8199 in 2007-2008
Conrail 75 5500-5574 After the 1999 Conrail split; 30 units went to CSX and were renumbered CSXT 8756-8773, 8775 - 8786; 44 units went to NS and were renumbered NS 6763-6806
Soo Line 5 6058-6062 Former SOO 6058-6062/CP 6258-6262 have now been put up for sale.
Union Pacific 281 6085-6365 Renumbered to 2240-2520 except 6106 & 6165. 24 rebuilt into EMD SD32ECOs. UP classifies these as SD59MXs. Renumbered 9900-9923. All 24 have been delivered.
Carajás Railroad (Vale) 2 601-602 Manufactured by Equipment Villares S. A. (EVSA) in 1991. Last locomotives manufactured by EVSA before the merger with GE Transportation in Brazil, leading to GEVISA.

See also[edit]

References[edit]

  1. ^ "NS SD60E Rebuilds". AltoonaWorks.info. Retrieved 2012-09-09. 
  2. ^ "NS Veterans Unit Announcement". Norfolk Southern Corp. Retrieved 2013-06-28. 

External links[edit]