Editing 4-8-2 (section)

{{Short description|Locomotive wheel arrangement}}
{{Infobox steam wheel arrangement
| name             = 4-8-2 (Mountain)
| image            = WheelArrangement 4-8-2.svg
| alt              = Diagram of two small leading wheels, four large driving wheels joined with a coupling rod, and a single small trailing wheel
| caption          = Front of locomotive at left
| image2           = SAR Class 3R 1464 (4-8-2).jpg
| alt2             = 
| caption2         = [[South African Class 3 4-8-2|NGR Hendrie D]], an early example of a Mountain locomotive
<!--Equivalent classifications-->
| hatnote          = 
| UIC/Germany/Italy= 2′D1
| French/Spanish   = 241
| Turkish          = 47
| Swiss            = 4/7
| Russian          = 2-4-1
<!--First tank engine version-->
| date             = 1888
| country          = Colony of Natal
| locomotive       = [[South African Class A 4-8-2T|NGR Class D, Dübs A]]
| railway          = [[Natal Government Railways]]
| designer         = William Milne
| builder          = [[Dübs & Company]]
| evolvedfrom      = 
| evolvedto        = 
| mainbenefit      = 
| maindrawback     = 
<!--First tender engine version-->
| date2            = 1906
| country2         = Colony of Natal
| locomotive2      = [[South African Class 1B 4-8-2|NGR Altered Class B]]
| railway2         = Natal Government Railways
| designer2        = David Hendrie
| builder2         = Natal Government Railways
| evolvedfrom2     = [[4-8-0]] modified
| evolvedto2       = [[4-8-4]]
| mainbenefit2     = Improved stability at speed
| maindrawback2    = 
<!--First "True type" version-->
| date3            = 1908
| country3         = [[New Zealand]]
| locomotive3      = [[NZR X class]]
| railway3         = [[New Zealand Railways Department]]
| designer3        = [[A. L. Beattie]]
| builder3         = [[Addington Workshops]]
| evolvedfrom3     = [[4-6-2]]
| evolvedto3       = 
| mainbenefit3     = Heavy freight haulage on mountainous sections of railway
| maindrawback3    = 
}}

Under the [[Whyte notation]] for the classification of [[steam locomotive]]s, '''{{nowrap|4-8-2}}''' represents the [[wheel arrangement]] of four [[leading wheel]]s, eight powered and coupled [[driving wheel]]s and two [[trailing wheel]]s. This type of steam locomotive is commonly known as the '''Mountain''' type,<ref name="steam glossary">{{cite web |url=http://www.railway-technical.com/st-glos.shtml |title=Steam Locomotive Glossary |work=Railway Technical Web Pages |date=2007-06-28 |access-date=2008-02-08 |archive-url=https://web.archive.org/web/20080128230325/http://www.railway-technical.com/st-glos.shtml |archive-date=2008-01-28 |url-status=dead }}</ref> though the [[New York Central Railroad]] used the name '''[[New York Central Mohawk|Mohawk]]''' for their 4-8-2s.