What is SJ T21?
{{Infobox locomotive |name = T21 |powertype = [[Diesel-electric]] |image = |imagesize = |caption = |builder = [[Maschinenbau Kiel]]<br>[[Svenska Järnvägsverkstäderna]] |builddate = 1955-59 (SJ)<br>1963 (NBJ) |totalproduction = 60 |uicclass = D |gauge = {{track gauge|sg}} |wheeldiameter = {{convert|1,255|mm|in|2|abbr=on|lk=on}} |length = {{convert|11,300|mm|ftin|frac=8|abbr=on}} |locoweight = {{convert|56.8|t}} [[tare weight]] |maxspeed = {{convert|80|km/h|abbr=on}} |transmission=[[Diesel-hydraulic transmission|Hydraulic]] |electricsystem = |collectionmethod = |poweroutput = {{convert|590|kW|abbr=on|lk=on}} |tractiveeffort = {{convert|170|kN|abbr=on|lk=on}} |operator = [[Statens Järnvägar]] |fleetnumbers = 57 - 112 }} '''T21''', originally '''T2''' is a [[diesel-hydraulic]] [[locomotive]] operated by [[Swedish State Railways]] ({{lang-sv|Statens Järnvägar, SJ}}) and [[Nora Bergslags Järnväg]] (NBJ) of Sweden. 60 units were built during the 1950s by [[Maschinenbau Kiel]] and [[Svenska Järnvägsverkstäderna]] based on the German [[DB Class V65]]. The T21 was technically identical with the MaK 800D. The T21 was used to replace [[steam locomotive]]s on [[branch line]]s. They were used until the 1990s. The order consisted of 56 locomotives, of which ten were to be built in Sweden with a Swedish hydraulic shift, designated '''T3''', later '''T22'''. The shift did not work particularly well, and only four were delivered, the rest with a German shift. Later two units were rebuilt to T21s. NBJ bought four T21 units in 1963. ==Other websites== * [http://www.jarnvag.net/lokguide/t21-t22 Järnväg.net on T21] {{Webarchive|url=https://web.archive.org/web/20190808013451/http://www.jarnvag.net/lokguide/t21-t22 |date=2019-08-08 }} {{Swedish railway stock}} [[Category:MaK locomotives]] {{transport-stub}}