SJ T44

T44 is a Swedish diesel-electric locomotive built by Nydqvist & Holm (NOHAB) and Kalmar Verkstad (KVAB) in 123 units between 1968 and 1987. It was the successor of T43, and used both for hauling and shunting. It is the most common diesel locomotive in Sweden, with state-owned Green Cargo as the largest operator. Other operators include Israel Railways (one), Malmtrafik (two) and formerly Norwegian State Railways (one, designated NSB Di 7) and Inlandsbanan AB.

T44
Type and origin
Power typeDiesel-electric
BuilderNOHAB and KVAB
ModelEMD G22
Build date1968–87
Total produced123
Specifications
Configuration:
​
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8 1⁄2 in)
Wheel diameter1,030 mm (41 in)
Length15,400 mm (50 ft 6 in)
Loco weight76 t (75 long tons; 84 short tons) tare weight
Prime moverGeneral Motors 12-645E
Engine typeV12 diesel
Displacement127 L (7,800 cu in)
Cylinders12
Cylinder size9 1⁄16 in × 10 in (230 mm × 254 mm)
bore x stroke
TransmissionElectric
Performance figures
Maximum speed100 km/h (62 mph)
Power output1,235 kW (1,656 hp)
Tractive effort220 kN (49,000 lbf)
Career
OperatorsStatens Järnvägar
Numbers259–283, 314–323, 329–416
Dispositionin service

History

Though mainly used for shunting and freight hauling, T44 class members have occasionally been used to haul passenger trains. In the 1970s they were used on the unelectrified Borlänge-Mora line, and in 1990s on the Inland Line. Compared to the predecessor T43 class, the T44 is more powerful and has a modernized drivers cab, with better noise insulation, though there are many similarities between the models. In appearance the T44 is somewhat more square than the predecessors. Up to three T44s can run in multiple units.

In 1993, SJ T44 276 was sold to the NSB for use as a shunter on the Ofoten Line, and given the designation NSB Di 7, and numbered 634. This engine was transferred, along with SJ T44 283, to Malmtrafik in 1996. When the Swedish State Railways (Swedish: Statens Järnvägar, SJ) was split in 2001, Green Cargo took over all the T44 locomotives, though four were sold to the Swedish railway company TGOJ (now a subsidiary of Green Cargo). In 2007, Green Cargo has ordered a full renovation of 100 units from Bombardier Transportation which included new four-stroke engines from MTU (type 12V 4000 R43).[1] The renovation is expected to extend the life-time with 15–20 years.[2] The first rebuilt units were delivered in 2009 and are called Td

References
  1. MTU repowers Green Cargo T44 locos www.mtu-online.com
  2. Pressmeddelande från Green Cargo www.greencargo.com Archived December 22, 2015, at the Wayback Machine
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