NZR DSB class

{{Use New Zealand English|date=July 2024}} {{Use dmy dates|date=April 2022}} {{Infobox locomotive | name = New Zealand D^SB class | image = File:NZR DSB class No. 313 - April 2015 - 03.jpg | powertype = Diesel-Mechanical/Hydraulic | builddate = 1954-1967 | builder = [[Drewry Car Co]] (25), [[Mitsubishi Heavy Industries]] (3) | locoweight = {{convert|37|t|lk=on}} | gauge = {{RailGauge|1067mm}} | aarwheels = 0-6-0 | firstrundate = August 1954 | lastrundate = April 1989 | disposition = 1 preserved, 27 scrapped | numinclass = 28 | currentowner = Avon Engineering (1), [[Mainline Steam Heritage Trust]] (1) | poweroutput = {{convert|195|kW|hp|abbr=on|lk=on}}''later:'' {{convert|263|kW|hp|abbr=on|lk=on}}<br />Mitsubishi:{{convert|280|kW|hp|abbr=on|lk=on}} | primemover = Drewry: National M4AA7;<br />''later:'' Caterpillar D343TA<br />Mitsubishi: [[Caterpillar Inc.|Caterpillar]] D343TA | maxspeed = Drewry: {{convert|39|km/h|mph|abbr=on}};<br />''later:'' {{convert|57|km/h|mph|abbr=on}}<br />Mitsubishi: {{convert|56|km/h|mph|abbr=on}} | locale = All of New Zealand | fleetnumbers = TMS numbers: 1003-1290<br />Road numbers: 300-327 | length = Drewry: {{convert|8.8|m|ftin|abbr=on}}<br />Mitsubishi:{{convert|8.5|m|ftin|abbr=on}} | operator = [[New Zealand Railways Department|NZGR]], [[New Zealand Railways Corporation]] }} The '''NZR DSB class locomotive'''{{#tag:ref|Following the introduction of [[New Zealand Railways Department#Traffic Monitoring System|TMS]] in 1979, the class classification was capitalised, whereas previously the second letter was a smaller capital letter, that is D^SB|group="nb"|name="DSB"}} is a type of shunting locomotive introduced to [[Rail transport in New Zealand|New Zealand's national rail network]] in 1954 by [[New Zealand Railways Department|New Zealand Railways]] (NZR).{{sfn|Palmer & Stewart|1965|p=147}}

== Introduction == In 1950, NZR placed an order for 25 D^SB shunting locomotives.{{sfn|Palmer & Stewart|1965|p=147}} They were built by the [[Drewry Car Co.]] between 1954 and 1956.{{sfn|Palmer & Stewart|1965|p=147}} The first three D^SB class locomotives were commissioned in August 1954. The D^SB are a larger and more powerful locomotive than the [[NZR DS class|D^S]] and [[NZR DSA class|D^SA class]]es and were used all over [[New Zealand]]. A second batch of three locomotives built by Mitsubishi Heavy Industries was introduced in 1967.{{sfn|Parsons|2002|p=26}} Included with the three Mitsubishi DSB class were two additional locomotives for the [[Ohai Railway Board]] at Ohai, Southland.{{fact|date=February 2025}}

The Drewry type B-2 had a cover-plate over the locomotive's [[jackshaft]] to prevent staff from being caught by the jackshaft while riding on the cab steps.

By the end of their lives, 12 DSBs were repainted in the "''International Orange''" livery.

== Withdrawal == In line with NZR's policy of rationalising locomotive classes, the DSB class was entirely withdrawn by the end of the 1980s.{{sfn|Parsons|2002|p=26}}

As of July 2014 only one DSB class has been preserved, DSB313 was purchased in January 1991 by the [[Mainline Steam Heritage Trust]] for shunting at their [[Parnell, New Zealand|Parnell]] depot.<ref>{{cite news|title=Railfan|publisher=Triple M Publications|volume=2|number=2|issn=1173-2229|date=March 1996}}</ref> However, both of the Ohai Railway Board's DSB-class equivalents No.1 and No.2 have been preserved, No.1 at [[Ocean Beach Railway]], Dunedin, and No.2 at [[Steam Incorporated]], Paekakariki. {{fact|date=February 2025}}

==References== ===Footnotes=== {{Reflist|group=nb}}

===Citations=== {{reflist}}

===Bibliography=== {{refbegin}} * {{cite book|last=Parsons|first=David|title=New Zealand Railway Motive Power 2002|publisher=[[New Zealand Railway and Locomotive Society]]|year= 2002|isbn=978-0-908573-78-3|pages=64|url=http://railsoc.org.nz/publication-catalogue/}} *{{cite book|last1=Palmer|last2=Stewart|first1=A.N.|first2=W.W.|title=Cavalcade of New Zealand Locomotives|publisher=[[Reed Publishing|A H. & A W. Reed]]|date=1965|ref={{sfnref|Palmer & Stewart|1965}}|ISBN=9780207945007}} {{refend}}

{{NZR Locomotives}}

[[Category:Diesel locomotives of New Zealand|DSB class]] [[Category:Railway locomotives introduced in 1954]] [[Category:Shunting locomotives]] [[Category:Mitsubishi locomotives]] [[Category:3 ft 6 in gauge locomotives of New Zealand]]