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TheEMD SD22ECO is a 2,150 hp (1,600 kW)C-Cdiesel-electric locomotive rebuilt byElectro-Motive Diesel. It is, along with theGP22ECO, primarily the application of a conversion kit to an existingEMD SD40-type locomotive. This involves replacing the existingprime mover with anEPATier-II-compliantturbochargedV8710G3A-T2, withelectronic 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.
TheKansas City Southern Railway andKansas City Southern de México were the only railroads to have rebuilt SD40s into SD22ECOs.[2][3]
| 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 |
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