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In service 1966–1990
Manufacturer Linke-Hofmann
Constructed 1966–67
Fleet numbers 1261–1266
Operator(s) Statens Järnvägar
Car length 19,620 mm (64 ft 4.4 in) (motor units)
21,000 mm (68 ft 10.8 in) (trailer)
Maximum speed 140 km/h (87 mph)
Weight 61.9 t (60.9 long tons; 68.2 short tons)
Power output 910 kW (1,220 hp)
Track gauge 1,435 mm (4 ft 8 12 in)

Y3 was a series of diesel railcars operated by Statens Järnvägar (SJ) of Sweden. Six units were delivered by Linke-Hofmann of Germany in 1966–67. Tbey remained in service until 1990, serving first on the unelectrified services StockholmMora and MalmöKarlskrona, later on Ystadbanan.

The Y3 served the same purpose as the electric X9-series. A variation of configurations was used, with the production consisting of six motor cars, two cab cars and eleven trailers. With motor cars on each end the Y3 could have six trailers between. The Y3 was the first double decker used in Sweden. The series was prone to fires, since the cooling system didn't work sufficiently. This was solved through rebuilding the cooling system in the 1970s.

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