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Type and origin
Power typeDiesel-electric
BuilderElectro-Motive Diesel (EMD)
Gauge4 ft 8 12 in (1,435 mm)
Prime mover710G3A, EMD 8–710G3A–T2
Performance figures
Power output2,150 hp (1,600 kW)

The EMD SD22ECO is a 2,150 hp (1,600 kW) C-C road switcher diesel-electric locomotive rebuilt by Electro-Motive Diesel. It is, along with the GP22ECO, primarily the application of a conversion kit to an existing EMD SD40-type locomotive. This involves replacing the existing prime mover with an EPA Tier-II-compliant turbocharged V8 710G3A, with electronic fuel injection. The prime mover is mated to an AR10 alternator for traction power, a CA6 alternator for control power, and a computerized control system.

Advertised benefits include:

  • EPA Tier-II compliance.
  • Fuel savings up to 25%.
  • Lube oil savings up to 50%.
  • Upgradeable software can be tuned for reduced emissions or improved fuel efficiency.
  • Microprocessor control offers diagnostics, wheel slip control, and optimal wheel/rail adhesion.
  • 184-day maintenance cycle instead of 92-day.
  • 15,000 MWh overhaul cycle.
  • Reduced maintenance expense due to use of standard 710 prime mover.
  • Automatic Engine Start Stop system keeps locomotive ready without wasting fuel.

This conversion does not alter the external appearance of the locomotive.


External links[edit]