Editing Automatic lubricator (section)

{{Short description|Device fitted to a steam engine to supply lubricating oil}}
{{For|the similar concept in two-stroke engines|Automatic lubrication}}

[[File:60163 Tornado pipework 2.jpg|thumb|Modern locomotive lubricators. The center item is a mechanical lubricator for the cylinders, operated by the connecting lever seen below it (or by the hand wheel, for priming). The smaller one to the right is a {{Section link||syphonic lubricator}}.]]An '''automatic lubricator''' is a device fitted to a [[steam engine]] to supply [[Lubricant|lubricating oil]] to the [[Cylinder (steam locomotive)|cylinders]] and, sometimes, the [[Plain bearing|bearings]]  and [[axle box]] mountings as well.<ref name="BTC1957">{{cite book|title=Handbook for steam locomotive enginemen|publisher=British Transport Commission|location=London|year=1957|pages=126–128|chapter=Lubrication|oclc=505163269}}</ref>  There are various types of automatic lubricator, which include various designs of displacement, hydrostatic and mechanical lubricators.