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{{Infobox locomotive
|name = SM15
|powertype = Diesel
|image = SM-15.jpg
|caption = SM15-17 at the [[Warsaw Railway Museum]].
|builder = {{flagicon|USSR}} [[Lyudinovo]] {{flagicon|POL}} [[Fablok]]
|serialnumber =
|buildmodel = ТГМ3
|builddate = 1963-1966
|totalproduction = 56
|uicclass = [[B′B′]]
|gauge = {{track gauge|sg}}
|bogies = 2
|wheeldiameter =
|length = {{convert|12600|mm|in|abbr=on}}
|width =
|height =
|frametype =
|weightondrivers =
|locoweight = 70 T
|fueltype =
|fuelcap =
|consumption = 210 g/km
|watercons =
|electricsystem =
|primemover =
|enginetype = [[four-stroke engine|four-stroke]]
|tractionmotors =
|aspiration =
|displacement =
|cylindercount =
|cylindersize =
|transmission = Hydraulic ([[Voith]] system)
|maxspeed = 60 km/h
|poweroutput = 550 kW
|tractiveeffort =
|factorofadhesion =
|locobrakes =
|trainbrakes =
|safety =
|operator = [[Polskie Koleje Państwowe|PKP]]
|operatorclass = {{flagicon|POL}} SM15 {{flagicon|POL}} Ls750H (Industry) {{flagicon|POL}}Ls750Hu (Industry)
|numinclass = 27 (PKP)
|fleetnumbers =
|officialname =
|nicknames =
|locale =
|deliverydate = 1963
|firstrundate =
|lastrundate =
|retiredate =
|restoredate =
|scrapdate =
|currentowner =
|disposition =
}}
The '''SM15''' (factory designation '''12D''') is a Polish diesel [[shunter]] used by [[Polskie Koleje Państwowe|PKP]] and industry <ref>{{cite web| url=http://157.158.1.11/~uboottd/jareks/assort/VIII.htm| title=Chester Home Page| author=Jarek D. Stwarz| date=1997–2002| accessdate=2007-08-30}}</ref> — where it carried the designation '''Ls750H'''. It is based on the Soviet '''ТГМ3''' (TGM3) locomotive.

==History==
[[File:DieselLoco tgm3.jpg|thumb|left|[[Soviet Union|Soviet]] '''ТГМ3''' locomotive — the predecessor of the SM15 — at the [[Sankt Petersburg|St. Petersburg]] Railway Museum.]]

Between the years 1963–1966, a total of 56 locomotives had been produced — 27 of which were used by [[Polskie Koleje Państwowe|PKP]].<ref>{{cite web| url=http://koleje.webd.pl/forum/viewtopic.php?t=569&sid=3011dc1ca59539d7d71d680887e19428| title=Fora Kolejowe| date=2007-01-18| accessdate=2007-08-30}}</ref> Of the latter 27, the first two units (SM15-01 and SM15-02) were built at the '''Людиновский тепловозостроительный завод''' (en: [[Lyudinovo]] Diesel Locomotive Factory) and exported to Poland. Production then resumed at the [[Fablok]] factory in [[Chrzanów]] where the remaining 25 units, earmarked for PKP, were built.

The newly built SM15s were assigned to the depot in Kraków Płaszów, before being withdrawn from service in the late 1960s and early 1970s, when the [[SM42]] series replaced them. Despite their relatively short operational history, the [[railroad engineer|engineers]] who drove the locomotives remember them as being very powerful machines.

==Technical data==
The SM15 is equipped with a [[Soviet Union|Soviet]] 550 kW [[diesel engine]] (a number of SM15s had Polish V12CD9 engines installed, rather than the Soviet variant) with [[hydromechanics|hydromechanical]] [[transmission (mechanics)|transmission]]. Certain models destined for use in industry had [[hydraulics|hydraulic]] transmission, and these carried the designation '''Ls750Hu'''. The SM15 is a [[B′B′]] locomotive, which means that the unit runs on two [[bogie]]s, with all axles powered.

The main reason behind the SM15's short operational lifespan was the unreliability of its transmission and power units.

==Preserved Units==
Currently, there are three known examples of the SM15 in preservation:

*'''SM15-17''' is an exhibit at the [[Warsaw Railway Museum]]
*'''SM15-22''' has been kept back as a [[monument]] at the Technical Rail College in [[Tarnowskie Góry]]

== References ==
{{Commons category|TGM3}}
{{Reflist}}

{{Polish railways locomotives}}

[[Category:Railway locomotives introduced in 1963]]
[[Category:Diesel–hydraulic locomotives of Poland]]
[[Category:B′B′ locomotives]]
[[Category:Standard-gauge locomotives of Poland]]
[[Category:Fablok locomotives]]
[[Category:Shunting locomotives]]

{{Diesel-loco-stub}}
{{poland-rail-transport-stub}}

PKP class SM15 - Revision history

2604:3D09:96F:B800:DDE2:1FEF:8DDF:BE2A: /* References */ Adding categories