Editing 2-6-4 (section)

{{Short description|Locomotive wheel arrangement}}
{{Use dmy dates|date=January 2020}}
{{Infobox steam wheel arrangement
| name             = 2-6-4 (Adriatic)
| image            = WheelArrangement 2-6-4.svg
| alt              = Diagram of one small leading wheel, three large driving wheels joined together with a coupling rod, and two small trailing wheels
| caption          = Front of locomotive at left
| image2           = PPR No 1.jpg
| alt2             = 
| caption2         = [[South African Class D 2-6-4T|PPR 55 Tonner 2-6-4T, SAR Class D]]
<!--Equivalent classifications-->
| hatnote          = 
| UIC/Germany/Italy= 1C2, 1'C2'
| French/Spanish   = 132
| Turkish          = 36
| Swiss            = 3/6
| Russian          = 1-3-2
<!--First known tank engine version-->
| date             = 1898
| country          = South Africa
| locomotive       = [[South African Class D 2-6-4T|PPR 55 Tonner]]
| railway          = Pretoria-Pietersburg Railway
| designer         = [[Beyer, Peacock & Company]]
| builder          = Beyer, Peacock & Company
| evolvedfrom      = 
| evolvedto        = 
| mainbenefit      = 
| maindrawback     = 
<!--First known tender engine version-->
| date2            = 1901
| country2         = [[Cape Colony|Cape of Good Hope]]
| locomotive2      = [[South African Class 6Z 2-6-4|CGR 6th Class 2-6-4]]
| railway2         = [[Cape Government Railways]]
| designer2        = [[Hazlitt Beatty]]
| builder2         = [[Neilson & Company#Turn of the 20th century|Neilson, Reid & Company]]
| evolvedfrom2     = [[2-6-2]]
| evolvedto2       = 
| mainbenefit2     = 
| maindrawback2    = 
<!--First known "True type" version-->
| date3            = 
| country3         = 
| locomotive3      = 
| railway3         = 
| designer3        = 
| builder3         = 
| evolvedfrom3     = 
| evolvedto3       = 
| mainbenefit3     = 
| maindrawback3    = 
}}

Under the [[Whyte notation]] for the classification of [[steam locomotives]], a '''{{nowrap|2-6-4}}''' locomotive has two [[leading wheel]]s, six coupled [[driving wheel]]s and four [[trailing wheel]]s.