EMD SD70 series

EMD SD70 series
Norfolk Southern SD70 No. 2562
Type and origin
Power typeDiesel-electric
BuilderElectro-Motive Diesel (EMD)
ModelSD70, SD70I, SD70M, SD70M-2, SD70AC, SD70MAC, SD70ACe, SD70ACe/LCi, SD70ACS, SD70ACe-T4, SD70ACe-BB, SD70ACe/45, SD70IAC, SD70ACe/LW, SD70ACe-P4, SD70ACe-P6, SD70ACU, SD70ACC, SD70MACH, SD70MACe
Build date1992–present
Total producedSD70: 122
SD70I: 26
SD70M: 1,609
SD70M-2: 331
SD70MAC: 1,109
SD70ACe: 2,091
SD70ACe/lc: 194
SD70ACS: 38
SD70ACe-P4: 23
SD70ACe-P6: 4
SD70ACe-T4: 143
SD70ACe-BB: 80
SD70ACe/45: 80
Specifications
Configuration:
 • AARC-C (B+B-B+B for SD70ACe-BB, B1-1B for SD70ACe-P4 and SD70MACH)
 • UICCo'Co' (Bo'Bo'Bo'Bo' for SD70ACe-BB, Bo1’1Bo’ for SD70ACe-P4 and SD70MACH)
 • CommonwealthCo-Co (Bo+Bo-Bo+Bo for SD70ACe-BB, Bo1-1Bo for SD70ACe-P4 and SD70MACH)
Gauge4 ft 8+12 in (1,435 mm) standard gauge for the North American market;
1,600 mm (5 ft 3 in) for Brazil;
1,000 mm (3 ft 3+38 in) for Brazil and Guinea
TrucksEMD HTCR-Ia: SD70, SD70I, SD70M, SD70MAC;
EMD HTCR-Ib: SD70I, SD70M, SD70MAC, SD70ACU;
EMD HTCR-4: SD70M, SD70MAC, SD70ACe;
EMD HTCR-6: SD70ACe, SD70ACe-T4;
EMD HTSC-II: SD70M, SD70ACe, SD70ACe/LCi, SD70ACS, SD70ACe/45;
EMD GBB: SD70ACe-BB
Prime moverEMD 16-710G3 2-stroke diesel;
EMD 12-1010J 4-stroke diesel for SD70ACe-T4
Engine typeV16;
V12 for SD70ACe-T4
Cylinders16
12 for SD70ACe-T4
TransmissionDiesel electric
Performance figures
Maximum speed70 mph (110 km/h), 75 mph (121 km/h) for the SD70ACe-T4
Career
NicknamesVacuum Cleaners (SD70ACe-T4) Thundercabs (Early SD70ACe models)
LocaleNorth America, Brazil, Peru, Guinea, Mauritania, Saudi Arabia, United Arab Emirates
DispositionMany operational, several retired due to wrecks, one preserved.

The EMD SD70 is a series of diesel-electric locomotives produced by the US company Electro-Motive Diesel. This locomotive family is an extension and improvement of the EMD SD60 series. Production commenced in late 1992[1][page needed] and since then over 5,700 units have been produced; most of these are the SD70M, SD70MAC, and SD70ACe models. While the majority of the production was ordered for use in North America, various models of the series have been used worldwide. All locomotives of this series are hood units with C-C trucks, except the SD70ACe-P4 and SD70MACH which have a B1-1B wheel configuration, and the SD70ACe-BB, which has a B+B-B+B wheel arrangement.

Superseding the HT-C truck, a new bolsterless radial HTCR truck was fitted to all EMD SD70s built 1992–2002; in 2003 the non-radial HTSC truck (basically the HTCR made less costly by removing radial components) was made standard on the SD70ACe and SD70M-2 models; the radial HTCR truck remained available as an option.