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Electro-Motive Division SD70ACe
United States | 2004 | 2,417 produced
BNSF No. 9211 in October 2014 in Lincoln, Nebraska
BNSF No. 9211 in October 2014 in Lincoln, Nebraska
Augy8400

When the new EPA Tier 2 emissions standard came into force in 2004, the SD70MAC was replaced by the SD70ACe. The core was a new variant of the 710 series prime mover, which worked with a lower internal pressure and therefore emitted fewer exhaust gases and particles. As already the last SD70MAC, they again made 4,300 hp. Due to more modern traction electronics, the starting tractive force could be increased to 191,000 pounds

With the Tier 3 emission standard from 2011, the locomotives were sold unchanged as the SD70ACe, but these in turn had a revised engine with now 4,500 hp. In the meantime, the cab has also been revised because many crews had previously complained about excessive volume and rattling noises.

In addition to the standard variant, modified variants were also built for individual customers. The Canadian National received four SD70ACe-P6, which have a traction converter on each axle and not just one on each bogie. The BNSF ordered 20 SD70ACe-P4, which have only four traction motors. In contrast to the GE AC44C4, however, the inner axle of both bogies is not powered.

The largest customer was Union Pacific, which received a total of 799 units. Of these, 281 are designated SD70AH, weighing 8,000 pounds more. In second place was the BNSF with 660 units. Other railroads that each ordered more than 100 units were the Kansas City Southern, Norfolk Southern and Ferromex.

The SD70ACe/LCi was developed for export to mining companies. The LCi stands for “Low Clearance international”, as these have a smaller loading gauge for the special area of application. 184 of the 205 LCi are being used by BHP Billinton in iron ore mining in the Pilbara region of Western Australia. Another variant is the SD70ACe/45, which is manufactured in Brazil.

Before the introduction of the new Tier 4 emissions standard from 2015, attempts were made to adapt the engine accordingly. However, since this did not succeed, no new SD70ACe could be registered in the contiguous USA. It was succeeded by the SD70ACe-T4, which used the four-stroke engine from the 1990s that now had been upgraded. The cheaper locomotives with two-stroke engines were still built for export and some could still be sold in the USA due to the emissions credits that were still available.

VariantTier 2Tier 3
General
Built2004-2011since 2011
ManufacturerElectro-Motive Division
Axle configC-C 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length74 ft 3 in
Wheelbase61 ft 5 in
Fixed wheelbase13 ft 7 in
Service weight420,000 lbs
Adhesive weight420,000 lbs
Axle load70,000 lbs
Power
Power sourcediesel-electric
Top speed70 mph
Starting effort191,000 lbf
EngineEMD 16-710G3C-T2EMD 16-710G3C-T3
Engine typeV16 diesel
Fuel4,900 us gal (diesel)
Engine output4,300 hp (3,207 kW)4,500 hp (3,356 kW)
Power Plant
Boiler
Calculated Values
diesel locomotive
freight
three-phase AC
last changed: 06/2023
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