EMD SD60

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EMD SD60 series

Soo Line 6022 pulls a train through Wisconsin Dells, WI, 20 June 2004
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division (EMD)
Build date	1984 – 1995
Total production	1,138
AAR wheel arr.	C-C
Gauge	4 ft 8½ in (1,435 mm)
Prime mover	EMD 16-710-G3A
Traction motors	D-87
Power output	3,800 hp (2.8 MW)
Disposition	most still in service as of 2005

The EMD SD60 was a 3,800 horsepower (2.8 MW) 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 of SD60 variants ran until 1995.

Contents 1 History and development 2 Variants 3 Original owners 4 References 5 External links

[edit] History and development

The development of the SD50 and SD60 series in the late 1970s and early 1980s was spurred by the introduction of 3,600 hp (2.7 MW) 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 quickly became a 'dud' in terms of sales due to poor mechanical reliability and an overly complex electrical distribution and control system that was unique to the EMD 50-Series Locomotives. EMD therefore quickly commenced development of the SD60 series, which would improve upon the weaknesses of the SD50. Although the carbody and frame are nearly indistinguishable from the earlier SD50, the SD60 featured the new 16 cylinder EMD 710-G3A prime mover, AR-11 main alternator, D-87 traction motors and a microprocessor-based control system that governed various systems within the locomotive (e.g. wheelslip & transition). Mechanically, 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 & mechanical issues that plagued the earlier SD50 model. EMD claimed that three SD60 units could replace four SD40-2s.

[edit] Variants

Several variants of the SD60 were built, including:

• The standard SD60, which had a conventional hood unit configuration.
• The SD60F, ordered and operated by Canadian National, had a full-width cowl body and four piece windshield.
• The SD60I "WhisperCab" variant featured a cab (with a full-width short hood) that was isolated from sound and vibration using a system of rubber gaskets. The same cab was later used on the SD70I, the SD80MAC and the SD90MAC. Only Conrail ordered this engine. All of these locomotives now belong to Norfolk Southern and CSX
• The SD60M, first ordered by the Union Pacific featured a "North American safety cab" design with a full-width short hood. Early models featured a three-window design with vertical windows (nicknamed "triclops"); later production used two windshield panes that were sloped back, and a somewhat shorter nose.
• The SD60MAC was a variant of the SD60M with AC powered traction motors. Although four demonstrator SD60MAC units tested on the Burlington Northern proved the viability of EMD's AC traction system, all subsequent orders were for the SD70MAC.

[edit] Original owners

Railroad	Qty.	Road Numbers	Notes
EMD SD60 orders
Burlington Northern	3	8300-8302	Demonstrators owned by EMD but painted for BN; Now with CSX Transportation
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
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)
Kansas City Southern	46	714-759
Norfolk Southern	151	6550-6700
Oakway	100	9000-9099	Leased to Burlington Northern (now BNSF)
Soo Line	58	6000-6057	SOO 6000-6020 returned to lessor, Capital Finance (CIT Group)
Union Pacific	85	6000-6084	Renumbered UP 2155-2239 (except UP 6014, wrecked & scrapped)
EMD SD60F orders
Canadian National	60	5500-5563	9900-9903 are pre-production SD60F's, originally classified as SD50AF & built as CN 9900-9903
EMD SD60I orders
Conrail	81	5544, 5575-5653
EMD SD60M orders
Burlington Northern	100	1991, 9200-9298	Renumbered BNSF 9200-9299, then renumbered BNSF 8100-8199 in late-2007 thru early-2008
Conrail	74	5500-5574
Soo Line	5	6058-6062
Union Pacific	281	6085-6365	Renumbered to 2240-2399 except 6106, 6143, 6164, 6244, which were wrecked & scrapped

[edit] References

• Diesel Era (unknown year). EMD's SD60 Series – Steppingstone to the 21st Century. Diesel Era. ISBN 1-881411-08-7. 
• Union Pacific Railroad Locomotive Department (1994). Locomotive Diagram Book. Union Pacific Railroad Company. 
• The Diesel Shop Locomotive Rosters

[edit] External links

• A photo gallery of Norfolk Southern SD60s

v • d • e 6- and 8-axle diesel-electric locomotives built by GM-EMD Six-axle road power SD7 · SD9 · SD18 · SD24 · SD28 · SD35 · SDP35 · SD38 · SD38AC · SD38-2 · SD39 · SDL39 · SD40 · SD40X · SD40A · SD40-2 · SD40-2W · SD40T-2 · SD40-2S · SDP40 · SD45 · SD45X · SD45-2 · SD45T-2 · SDP45 · SD50 · SD60 · SD70 · SD70I · SD70M · SD70MAC · SD70M-2 · SD70ACe · SD75M · SD75I · SD80MAC · SD89MAC · SD90MAC Eight-axle road power DD35 · DD35A · DDA40X · DDM45 See also: List of GM-EMD locomotives

v • d • e Diesel cab and cowl locomotives built by GM-EMD Cab units (F- & E-units) FT, F2, F3, F7, FP7, F9, FP9, FL9, TA, EA/EB, E1, E2, E3, E4, E5, E6, E7, E8, E9, AA, AB6 Cowl units F45, FP45, F40C, F40PH, F40PH-2, F40PH-2C, F40PH-2M, SDP40F, SD40-2F, SD50F, F59PH and F59PHI, SD60F, F69PHAC, DE30AC, DM30AC See also: List of GM-EMD locomotives