The EMD SD38-2 is a model of six-axle diesel-electric locomotive built by General Motors Electro-Motive Division (EMD) from 1972 to 1979. EMD built 90 of these medium road-switchers, which were used in both yard and mainline roles. Part of the EMD Dash 2 line, the SD38-2 was an upgraded SD38 with modular electronic control systems, HT-C trucks, and many other detail improvements. The locomotive's power was provided by an EMD 16-645E 16-cylinder engine, which could generate 2,000 horsepower (1,500 kilowatts). These units were constructed with either 3,200 or 4,000 US gal (12,000 or 15,000 L; 2,700 or 3,300 imp gal) fuel tanks and were available with or without dynamic brakes. It shared the same 64-foot-8-inch (19.71 m) frame as the SD40-2 and SD45-2, which gives it a length over couplers of 68 feet 10 inches (20.98 m).
Quick facts Type and origin, Power type ...
| EMD SD38-2 |
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 LLPX 2808 in February 2005 |
| Type and origin |
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| Power type | Diesel-electric |
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| Builder | |
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| Model | SD38-2 |
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| Build date | 1972–1979 |
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| Total produced | 90 |
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| Specifications |
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Configuration:
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| • AAR | C-C |
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| • UIC | Co′Co′ |
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| • Commonwealth | Co-Co |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge[a] |
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| Trucks | 6-Wheel |
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| Wheel diameter | 40 in (1.0 m) |
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| Minimum curve | 57° |
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| Wheelbase | 13 ft 7 in (4,140 mm) |
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| Pivot centres | 43 ft 6 in (13,260 mm) between bolsters; |
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| Length | 68 ft 10 in (20,980 mm) |
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| Width | 10 ft 3 in (3.12 m) over cab width |
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| Height | 15 ft 7.5 in (4.763 m) over top cab |
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| Loco weight | 368,000 lb (167,000 kg) |
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| Fuel type | Diesel |
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| Fuel capacity | 3,200–4,000 US gal (12,000–15,000 L; 2,700–3,300 imp gal) |
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| Lubricant cap. | 243 US gal (920 L; 202 imp gal) |
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| Coolant cap. | 240 US gal (910 L; 200 imp gal) |
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| Sandbox cap. | 56 ft3 (1,600 L) |
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| Prime mover | EMD 16-645E |
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| RPM: | |
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| • RPM low idle | 200 |
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| • RPM idle | 315 |
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| • Maximum RPM | 950 |
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| Engine type | V16 Two-stroke diesel |
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| Aspiration | Roots-blown |
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| Alternator | Delco 14 or
AR10E1-D14 |
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| Generator | Main: GM - AR10E1-D14
Auxilary: Delco A8102 |
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| Traction motors | 6 × D77/78 DC |
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| Cylinders | 16 |
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| Cylinder size | 8.5 in (220 mm) x 10 in (250 mm) |
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| Gear ratio | 62:15 |
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| MU working | Yes |
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| Loco brake | Air, Dynamic |
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| Train brakes | Westinghouse 26L Air Brake |
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| Performance figures |
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| Maximum speed | 65 mph (105 km/h) |
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| Power output | 2,000 hp (1,500 kW) |
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Tractive effort:
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| • Starting | 90,000 lbf (41,000 kgf) @ 25% |
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| • Continuous | 82,100 lbf (37,200 kgf) @ 6.6 mph (10.6 km/h) |
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