NZR DSB class

{{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}}
Mitsubishi:{{convert|280|kW|hp|abbr=on|lk=on}}

| primemover = Drewry: National M4AA7;
later: Caterpillar D343TA
Mitsubishi: Caterpillar D343TA

| maxspeed = Drewry: {{convert|39|km/h|mph|abbr=on}};
later: {{convert|57|km/h|mph|abbr=on}}
Mitsubishi: {{convert|56|km/h|mph|abbr=on}}

| locale = All of New Zealand

| fleetnumbers = TMS numbers: 1003-1290
Road numbers: 300-327

| length = Drewry: {{convert|8.8|m|ftin|abbr=on}}
Mitsubishi:{{convert|8.5|m|ftin|abbr=on}}

| operator = NZGR, New Zealand Railways Corporation

}}

The NZR DSB class locomotive{{#tag:ref|Following the introduction of 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 New Zealand's national rail network in 1954 by 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 D^S and D^SA classes 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 depot.{{cite news|title=Railfan|publisher=Triple M Publications|volume=2|number=2|issn=1173-2229|date=March 1996}} 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=

=Citations=

=Bibliography=

{{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=A H. & A W. Reed|date=1965|ref={{sfnref|Palmer & Stewart|1965}}|ISBN=9780207945007}}

DSB class

Category:Railway locomotives introduced in 1954

Category:Shunting locomotives