Kansas City Southern Railway 3057.

By terry cantrell - originally posted to Flickr as KCS 3057, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=3874181

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Kansas City Southern Railway 3057.
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EMD SDP40 Diesel-Electric Locomotive
An SDP40 is a 6-axle passenger diesel-electric locomotive built by General Motors Electro-Motive Division (EMD) between June 1966 and May 1970.

Design
Like its predecessor in EMD's catalog, the SDP35, the SDP40 is a high-horsepower freight locomotive with equipment for passenger train service.

In 1966, EMD replaced all their production units with those powered by the new 645 diesel. They included six-axle models SD38, SD40 and SD45, in addition to SDP40. All had standard components including the frame, cab, generator, trucks, traction motors, and air brakes. The main difference was the power: The SD38 developed 2,000 hp (1,490 kW) from a non-turbocharged V16, the SD40 developed 3,000 hp (2,240 kW) from a turbocharged V16, and the SD45 developed 3,600 hp (2,680 kW) from a turbocharged V20.

The SD40 and SDP40 were so similar that EMD published common operator's and service manuals to cover both.

At the time most passenger locomotives needed to provide steam to the passenger cars for heating, cooking, and sometimes cooling. They needed a higher gear ratio for faster running, the graduated-release feature on the air brakes, and type F tight-lock couplers to keep equipment together in the event of a derailment. To fit a steam generator to the freight-only SD40, the designers had to move the machinery forward about 2 feet (0.61 m) on the frame, add a compartment behind the radiators for the boiler, and divide the fuel tank into fuel and water sections.

Appearance
Earlier passenger diesels, like EMD E8, ALCO PA, FM Erie-built and Baldwin Sharknose locomotives, were streamlined cab units designed for visual appeal and the appearance of speed. The SDP40 instead has the rugged appeal of a high-horsepower road-switcher locomotives of the time. This look was contemporary to, and eventually overtaken by cowl units like the GE U30CG and EMD FP45, SDP40F and F40PH.

Visually, the locomotive is a hood unit distinguished only by the shape of its rear end behind the radiators, with its flat end having no number boards, shuttered boiler air intake on each side, extra exhaust stacks over the boiler, cantilevered walkway around the flat end, and very steep rear steps. EMD applied this same end to the passenger SDP35, SDP45, and GP40P locomotives, as well as the freight DD35, DDA40X and SD40T-2.

Amtrak's SDP40F locomotive, although sharing several mechanical specifications, is visually a much different locomotive. Seven years separate their introductions, and the SDP40F was actually based on the SD40-2. It had a full-width carbody, similar to the FP45. It was also 6 feet (1.83 m) longer than the SDP40.

Original Owners
Great Northern Railway (GN) purchased the first six SDP40s in 1966, to replace older F-units on their Western Star and smaller regional trains. Options included Vapor OK-4740 steam generators, water-transfer capability between units, 59:18 gearing for a top speed of 83 mph (134 km/h), and Type-F couplers. These were followed in 1967 by eight more powerful SDP45 locomotives ordered for the Empire Builder. After the startup of Amtrak in 1971, Great Northern's successor Burlington Northern Railroad (BN) converted the locomotives to freight service.

One SDP40, former GN 323, was temporarily renumbered BN 1976 and painted in red, white and blue for the United States Bicentennial in 1976.

NdeM had ten units delivered in 1968 and another four in 1970. In 1998, the government of Mexico privatized the NdeM the locomotives were split between two successor companies. Eight went to TFM, which was later purchased by Kansas City Southern Railway and became KCSM. Of those eight, two were rebuilt to SD22ECOs, and the other six were scrapped. The remaining six went to Ferromex. Of those six, four were rebuilt to SDP40-2s and remain in service, the other two were scrapped.

Roster
Order Number:  7870-
Build Date:  5/66
Serial Number:  31592
Phase:  Ia2
1st Road Number:  GN 320
2nd Road Number:  BN 9850
3rd Road Number:  BN 6394
Disposition:  Scrapped MK Rail July 1996

Order Number:  7870-2
Build Date:  5/66
Serial Number:  31593
Phase:  Ia2
1st Road Number:  GN 321
2nd Road Number:  BN 9851
3rd Road Number:  BN 6395
4th Road Number:  MRL 290
Disposition:  Rebuilt, Active.

Order Number:  7870-
Build Date:  5/66
Serial Number:  31594
Phase:  Ia2
1st Road Number:  GN 322
2nd Road Number:  BN 9852
3rd Road Number:  BN 6396
Disposition:  Wrecked June 1984, scrapped.

Order Number:  7870-4
Build Date:  5/66
Serial Number:  31595
Phase:  Ia2
1st Road Number:  GN 323
2nd Road Number:  BN 9853
3rd Road Number:  BN 6397
4th Road Number:  BN 1976
5th Road Number:  BN 6397
6th Road Number:  BNSF 6325
7th Road Number:  GCFX 3093
8th Road Number:  GRD 9043
Disposition:  Rebuilt, Active.

Order Number:  7870-
Build Date:  5/66
Serial Number:  31596
Phase:  Ia2
1st Road Number:  GN 324
2nd Road Number:  BN 9854
3rd Road Number:  BN 6398
4th Road Number:  BNSF 6326
5th Road Number:  GN 6326
Disposition:  Stored Out-of-service - Reporting mark changed from BNSF to GN to make way for new deliveries.

Order Number:  7870-
Build Date:  5/66
Serial Number:  31597
Phase:  Ia2
1st Road Number:  GN 325
2nd Road Number:  BN 9855
3rd Road Number:  BN 6399
4th Road Number:  BNSF 6327
5th Road Number:  MNTX 6327
6th Road Number:  MNTX 325
Disposition:  Wrecked August 1979 and rebuilt. Retired June 2008, donated to the Minnesota Transportation Museum May 2009. Active.

Order Number:  710917
Build Date:  5/68
Serial Number:  33371
Phase:  IIb_
1st Road Number:  NdeM 8522
2nd Road Number:  FNM 8522
3rd Road Number:  TFM 1314
4th Road Number:  KCSM 1314
Disposition:  Scrapped December 2008 by Progress Rail in Mayfield, KY.

Order Number:  710918
Build Date:  5/68
Serial Number:  33372
Phase:  IIb_
1st Road Number:  NdeM 8523
2nd Road Number:  FNM 8523
3rd Road Number:  TFM 1315
4th Road Number:  KCSM 1315
Disposition:  Scrapped.

Order Number:  710919
Build Date:  5/68
Serial Number:  33373
Phase:  IIb_
1st Road Number:  NdeM 8524
2nd Road Number:  FXE ????

Order Number:  710920
Build Date:  5/68
Serial Number:  33374
Phase:  IIb_
1st Road Number:  NdeM 8525
2nd Road Number:  FXE ????

Order Number:  710921
Build Date:  5/68
Serial Number:  33375
Phase:  IIb_
1st Road Number:  NdeM 8526
2nd Road Number:  FXE ????

Order Number:  710922
Build Date:  5/68
Serial Number:  33376
Phase:  IIb_
1st Road Number:  NdeM 8527
2nd Road Number:  FXE ????

Order Number:  710923
Build Date:  5/68
Serial Number:  33377
Phase:  IIb_
1st Road Number:  NdeM 8528
2nd Road Number:  FNM 8528
3rd Road Number:  TFM 1316
4th Road Number:  KCSM 1316
Disposition:  Scrapped December 2008 by Progress Rail in Mayfield, KY.

Order Number:  710924
Build Date:  5/68
Serial Number:  33378
Phase:  IIb_
1st Road Number:  NdeM 8529
2nd Road Number:  FNM 8529
3rd Road Number:  TFM 1317
4th Road Number:  KCSM 1317
Disposition:  Scrapped December 2008 by Progress Rail in Mayfield, KY.

Order Number:  710925
Build Date:  5/68
Serial Number:  33379
Phase:  IIb_
1st Road Number:  NdeM 8530
2nd Road Number:  FNM 8530
3rd Road Number:  TFM 1318
4th Road Number:  KCSM 1318
5th Road Number:  KCS 3057
Disposition:  Scrapped.

Order Number:  710926
Build Date:  5/68
Serial Number:  33380
Phase:  IIb_
1st Road Number:  NdeM 8531
2nd Road Number:  FNM 8531
3rd Road Number:  TFM 1319
4th Road Number:  KCSM 1319
Disposition:  Rebuilt to SD22ECO August 2009.

Order Number:  711392
Build Date:  5/70
Serial Number:  36156
Phase:  IIb2
1st Road Number:  NdeM 8532
2nd Road Number:  FXE ????

Order Number:  711393
Build Date:  5/70
Serial Number:  36157
Phase:  IIb2
1st Road Number:  NdeM 8533
2nd Road Number:  FNM 8533
3rd Road Number:  TFM 1320
4th Road Number:  KCSM 1320
Disposition:  Rebuilt to SD22ECO August 2009.

Order Number:  711394
Build Date:  5/70
Serial Number:  36158
Phase:  IIb2
1st Road Number:  NdeM 8534
2nd Road Number:  FXE ????

Order Number:  711395
Build Date:  5/70
Serial Number:  36159
Phase:  IIb2
1st Road Number:  NdeM 8535
2nd Road Number:  FNM 8535
3rd Road Number:  TFM 1321
4th Road Number:  KCSM 1321
Disposition:  Scrapped.

Note: Phases refer to SD40s in general.

Wrecks
On August 23, 1979, BN 6399 was the lead unit of train 23 when it ran head-on into train 182 at Maiden Rock, WI. 6399 was repaired and returned to service, as were the four units of the other train. The three trailing GP40 units were destroyed.

Rebuilds
  FNM 13099 was rebuilt by the San Luis Potosi shops, but the original locomotive number is unknown. The steam generator air intake was plated over during the rebuild.
  FXE 3227 appears to have been rebuilt from an SDP40, but the original locomotive number is unknown. The steam generator air intake was plated over during the rebuild, but it retained the full compartment and vertical rear steps.
  MRL 290 was wrecked in 1988, and subsequently sold to MRL. It is listed in rosters and lettered as an SDP40-2XR. Its steam generator air intake was plated over during the rebuild, but it retained the full compartment and vertical rear steps.
  GCFX 3093 sources suggest was remanufactured by Alstom to SD40-2 specifications. Much of the steam generator compartment was removed to permit installation of compliant rear switching steps.
  KCS 1319 was rebuilt by EMD in London, ON during August 2009 into an SD22ECO, keeping its external appearance.
  KCS 1320 was rebuilt by EMD in London, Ontario during August 2009 into an SD22ECO, keeping its external appearance.

A consideration when rebuilding an SDP40 is that the rear corner steps do not comply with current Federal Regulations. The bottom step must be further out than the upper steps to provide a place to stand. Since the steam generator compartment extends to the end of the frame, it must be removed to install compliant switching steps. FXE 3212 and GCFX 3093 are examples.

The KCS pair rebuilt into SD22ECOs took a different approach: The bottom steps of the rear ladders were moved out to meet the requirement.

Preservation
BNSF Railway donated No. 6327 - former GN 325 and their last SDP40 in service - to the Minnesota Transportation Museum in May 2009. Since then, it has been in service on the Osceola and St. Croix Valley Railway. The Museum has renumbered the locomotive back to 325 and, in the future, it will be repainted in the Great Northern "Big Sky Blue" paint scheme.

EMD SDP40 Overview
Type and origin
Power type: Diesel-electric
Builder: General Motors Electro-Motive Division (EMD)
Model: SDP40
Build date: June 1966 – May 1970
Total produced: 20
Specifications
Configuration:
​ • AAR C-C
 • UIC Co'Co'
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Trucks: Flexicoil C2L
Wheel diameter: 40 in (1,016 mm)
Minimum curve: 274 ft (84 m)
Length: 65 ft 8 in (20.02 m) over the coupler pulling faces
Width: 10 ft 0 in (3.05 m)
Height: 15 ft 5 1⁄4 in (4.705 m)
Locomotive weight: 370,000 lb (170,000 kg)
Fuel type: diesel
Fuel capacity: 1,800 US gal (6,800 l; 1,500 imp gal)
Lubricant capacity: 243 US gal (920 l; 202 imp gal)
Coolant capacity: 295 US gal (1,120 l; 246 imp gal)
Water capacity: 2,200 US gal (8,300 l; 1,800 imp gal)
Sandbox capacity: 56 cu ft (1.6 m3)
Fuel consumption: 167 US gal (630 l; 139 imp gal) per hour
Water consumption: 45 US gal (170 l; 37 imp gal) per hour
Prime mover: EMD 16-645-E3
RPM range: 315-900
Engine type: V16 Two-stroke diesel
Aspiration: Mechanically-assisted turbocharger
Displacement: 10,320 cu in (169,100 cm3)
Alternator: AR-10
Traction motors: D-77
Cylinders: 16
Transmission: Diesel-electric transmission
Train heating: Steam generator
Locomotive brake: Independent air; optional: dynamic brakes
Train brakes: Air, schedule 26-L
Performance figures
Maximum speed: 83 mph (134 km/h)
Power output: 3,000 hp (2,240 kW)
Career
Locale: North America

See also:

EMD GP40P

GM-EMD Diesel-Electric Locomotives

Diesel Electric Locomotives

GM-EMD