Y31 operated by Tåg i Bergslagen
|In service||2002 -|
|Number under construction||9|
|Formation||2 or 3 cars|
|Line(s) served||Germany and Sweden|
|Train length||38.4 m (125 ft 11.8 in)
54.7 m (179 ft 5.5 in)
|Doors||4 (2 cars) 6 (3 cars)|
|Articulated sections||2 or 3|
|Maximum speed||140 km/h (87 mph)|
|Weight||61.5 t (60.5 long tons; 67.8 short tons)
82.5 t (81.2 long tons; 90.9 short tons)
|Engine type||Diesel engine|
|Power output||1,280 kW (1,720 hp)|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in) standard gauge|
Bombardier Itino Y31/Y32 is a diesel multiple unit manufactured by Bombardier Transportation, originally developed by Adtranz. It has two or three cars and is capable of 140–160 km/h (87–99 mph). 40 units have been built and 17 more are on order. It is in service in Germany and Sweden.
In Sweden the unit has the designation Y31 and Y32, the latter for the three-car formation. Seventeen units have been delivered and are operated by Jönköpings Länstrafik, Kalmar Länstrafik, Värmlandstrafik and Västtrafik. The Itino is intended to replace the Y1 railcars.
The trains have two MAN diesel engines. The engines are based on truck engines, but larger (each 22 L (1,343 cu in)/cylinder volume), also used for boats and electrical generators. They have hydraulic transmission. From 2008 new trains will have two engines from Iveco (also based on truck engines) and they will fulfill the latest environmental requirements for trucks. They will have mechanical automatic gearboxes from ZF Friedrichshafen meant for trucks.
The multiple unit got a bad start in Sweden, when it was shown that the brakes could not cope with snow. This has led to that the model was suspended during the winter for oversight, which mostly affected "Tåg i Bergslagen" (and "SJ AB" which at the time was taking them into service) with its traffic on the Västerdalsbanan where the two first units were used. It has also from time to time affected other operators in Sweden. There has been a lot of other quality problems with these trains. The train traffic on Västerdalsbanan has been permanently replaced with buses from 2011.
Krösatågen Y32 at Nässjö C