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Freight Locomotive SD 90 MAC

Freight Locomotive

Freight Locomotive SD 90 MAC
for Union Pacific UP

Freight Locomotive SD 90 MAC

TECHNICAL DATA
Type SD 90 MAC 6000 HP
Year
1998 – 1999
Wheel arrangement
Co’Co’
Diesel engine rating [kW]
4,475
Starting tractive effort [kN]
890
Maximum speed [km/h]
128
Weight [t]
190
Track gauge [mm]
1,435
Numbers built
22

TECHNICAL DATA
Type SD 90 MAC 4300 HP
Year
1996 – 1999
Wheel arrangement
Co’Co’
Diesel engine rating [kW]
3,210
Starting tractive effort [kN]
820
Maximum speed [km/h]
128
Weight [t]
190
Track gauge [mm]
1,435
Numbers built
309

In spring 1994, Union Pacific placed an order for diesel-electric locomotives from EMD and Siemens. These vehicles are based on the SD 80 MAC. This locomotive is already designed to allow the use of various diesel engine variants. UP selected the variants with 4,300 and 6,000 HP. Several follow-up orders increased the customer’s fleet of 4,300-HP SD 90 MAC to a total of 309 locomotives, which are primarily used in freight operations. UP still also operates 22 vehicles SD 90 MAC Phase 1 with 6,000 HP.

In 1999, the leasing company CIT ordered 40 locomotives of the type SD 90 MAC with a 4,300-HP rating. These units are leased to cover peak demands with other operators. The SD 90 MAC is a multi-purpose locomotive that is primarily used for freight traffic.

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