EMD SD22ECO

The EMD SD22ECO is a 2,150 hp (1,600 kW) C-C 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-T2, 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.^[1] This conversion does not alter the external appearance of the locomotive.

EMD SD22ECO
Type and origin Power type Diesel-electric Builder Electro-Motive Diesel (EMD)
Specifications Configuration: ​  • AAR C-C Gauge 4 ft 8+1⁄2 in (1,435 mm) Prime mover EMD 710G3A, 8–710G3A–T2 Cylinders V8 Transmission Diesel-electric
Performance figures Power output 2,150 hp (1,600 kW)

The Kansas City Southern Railway and Kansas City Southern de México were the only railroads to have rebuilt SD40s into SD22ECOs.^[2][3]

Rebuilders

Railroad	Quantity	Road Numbers	Notes
KCS	2	2600 & 2601[4]	Rebuilt from TFM SDP40 1319 & 1320[5]
KCSM	2	2650 & 2651[4]	Rebuilt from KCS SD40-2 690 & 692