JNR Class DD51

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Class DD51
DD51 1027 in October 2007
Type and origin
Power typeDiesel-hydraulic
BuilderHitachi, Kawasaki, Mitsubishi
Build date1962 - 1978
Specifications
Configuration:
​
 • UICB-2-B
Gauge1,067 mm (3 ft 6 in)
Wheel diameter860 mm
Length18,000 mm
Width2,951 mm - 2,971 mm[1]
Height3,956 mm
Loco weight84 tonnes
TransmissionHydraulic
Performance figures
Maximum speed95 kilometres per hour (60 mph)*
Power output2,200 hp
Career
OperatorsJNR, JR Hokkaido, JR East, JR Central, JR West, JR Freight
Number in class649[1]
DispositionOperational

The Class DD51 (DD51形) is a B-2-B wheel arrangement diesel-hydraulic locomotive type operated in Japan since 1962. 649 locomotives were built between 1962 and 1978 by Kawasaki Sharyo, Hitachi, and Mitsubishi. The class was designed for mainline passenger and freight use with more power than the D51 and a higher maximum speed than the C62 steam locomotive classes. This was achieved by installing two 1,100 hp engines in an 18 metre long centre-cab design, unusual for mainline operation. The V12 DML61 engines were developed from the 6-cylinder inline DMF31 engines used in the Class DD13 locomotives.[2]

Variations

Locos numbered from DD51 501 to 799 and from 1001 to 1186 were equipped to operate in multiple, and locos numbered DD51 800 to 899 and 1801 to 1805 were built without steam generators for train heating.[2]

Liveries

All locomotives numbered from DD51 2 onwards were finished in the standard diesel livery of orange/red with grey upper surfaces separated by a white stripe. Re-engined locos operated by JR Freight in Hokkaido sport a livery based on the Class DF200 colour scheme, with no white stripe. These locomotives were used in pairs double-heading freight trains.

JR Hokkaido locos were all finished in the "Hokutosei" livery of blue with a gold stripe and shooting star logo. These were used in pairs for hauling sleeper trains (Hokutosei, Cassiopeia, and Twilight Express) between Hakodate and Sapporo.[3]

DD51 592 (now withdrawn), and now DD51 791, was repainted in the "Euroliner" livery of pale blue with dark blue stripes for use with JR Central's "Euroliner" Joyful Train set.

DD51 842 was designated as the Imperial Train locomotive. Whereas regular members of the class have white handrails and edges to the running boards, they are polished stainless steel on this particular locomotive, as are the exhaust shrouds. Based at Takasaki Depot, it is also used for special excursion trains.[3]

  • DD51 842 on an Imperial Train working in October 2001
    DD51 842 on an Imperial Train working in October 2001
  • DD51 1095 in JR Hokkaido Hokutosei livery in February 2010
    DD51 1095 in JR Hokkaido Hokutosei livery in February 2010
  • JR Central DD51 791 in Euro Liner livery
    JR Central DD51 791 in Euro Liner livery
  • DD51 1166 in JR Freight blue livery initially applied to refurbished locomotives, July 2006
    DD51 1166 in JR Freight blue livery initially applied to refurbished locomotives, July 2006
  • DD51 1803 in JR Freight red livery applied to refurbished locomotives, August 2007
    DD51 1803 in JR Freight red livery applied to refurbished locomotives, August 2007

Refurbishment

A pair of refurbished Hokkaido-based JR Freight DD51s led by D51 1152

Many of the JR Freight locomotive underwent life extension refurbishment, which included removal of steam generator equipment where still fitted. These locos are distinguished by a new livery of blue with grey upper surfaces separated by a white stripe, and cream end panels.

DD51 class locomotives also formed the basis for the DD17, DD18, and DD19 self-propelled snow plough units.[3]

Fleet allocation

Eight withdrawn JR Hokkaido Class DD51s stored at Jinyamachi Rinkai Yard in July 2016

As of 1 April 2016, excluding those locomotives operated by JR Freight, there were 17 Class DD51s still in service, with five operated by JR Hokkaido, four by JR East, and eight by JR West.[4]

Overseas operations

A number of Class DD51 locomotives have been shipped to Myanmar for use on the Myanmar Railways.[5]

As of March 2016, the status of DD51s shipped to Myanmar is as follows.[5]

Original number Manufacturer Date built Last owner Date withdrawn Date shipped MR number(s) Status
DD51 797 Hitachi November 1972 JR Freight March 2003 2004 D2D.2201 Stored out of use
DD51 823 Hitachi August 1970 JR Freight June 2005 2005 D2D.2202 Status unknown
DD51 1070 Mitsubishi February 1974 JR Freight December 2005 2005 DD.1101 Cut up May 2015
DD.1102 Stored out of use
DD51 1001 Mitsubishi October 1972 JR Freight December 2005 2005 DD.1103 Stored out of use
DD.1104 Status unknown
DD51 1006 Mitsubishi November 1972 JR Hokkaido December 2008 2012 DF.2027 Awaiting conversion
DD51 1068 Mitsubishi February 1974 JR Hokkaido December 2008 2012 DF.2012 Awaiting conversion

Conversion included re-gauging from 1,067 mm (3 ft 6 in) to 1,000 mm (3 ft 3+3⁄8 in) and lowering the cab roof profile.[5] Locomotives DD51 1070 and DD51 1001 were heavily rebuilt with parts from other locomotives to form four Bo-Bo wheel arrangement locomotives used for depot shunting work.[5]

Preserved examples

As of April 2016, seven class DD51 locomotives are preserved:

The prototype, DD51 1, with its unique, more rounded appearance, was moved to the Usui Pass Railway Heritage Park in April 1998 and repainted in its original livery of brown with white lining. This locomotive was withdrawn March 1986, and was subsequently stored at Takasaki Depot from March 1987.[1]

  • Prototype DD51 1 preserved at the Usui Pass Railway Heritage Park in April 2011
    Prototype DD51 1 preserved at the Usui Pass Railway Heritage Park in April 2011
  • DD51 548 preserved at the Mikasa Railway Village in Hokkaido in May 2007
    DD51 548 preserved at the Mikasa Railway Village in Hokkaido in May 2007
  • DD51 610 preserved at the Mikasa Railway Village in Hokkaido in May 2007
    DD51 610 preserved at the Mikasa Railway Village in Hokkaido in May 2007
  • DD51 615 preserved at the Otaru Museum in Hokkaido in August 2009
    DD51 615 preserved at the Otaru Museum in Hokkaido in August 2009
  • DD51 756 preserved at the Kyoto Railway Museum in October 2016
    DD51 756 preserved at the Kyoto Railway Museum in October 2016
  • DD51 849 at the Railway Technical Research Institute (RTRI) facility in Kokubunji, Tokyo in October 2001
    DD51 849 at the Railway Technical Research Institute (RTRI) facility in Kokubunji, Tokyo in October 2001

See also

References

Wikimedia Commons has media related to JNR DD51.
  1. ^ a b c Ishii, Yoshitaka (2004). DD51物語. Tokyo, Japan: JTB Can Books. ISBN 4-533-05661-X. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  2. ^ a b Inoue, Kōichi (1999). 国鉄機関車辞典. Japan: Sankaido. pp. 176–177. ISBN 4-381-10338-6. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  3. ^ a b c JR全車輌ハンドブック2006. Japan: Neko Publishing. 2006. ISBN 4-7770-0453-8. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  4. ^ JR気動車客車編成表 2016 (in Japanese). Japan: Kotsu Shimbunsha. 22 June 2016. p. 233. ISBN 978-4-330-69016-2. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  5. ^ a b c d Saito, Mikio (October 2016). ミャンマーに渡ったDD51. Japan Railfan Magazine (in Japanese). Vol. 56, no. 666. Japan: Koyusha Co., Ltd. p. 149-151. {{cite magazine}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  6. ^ a b c d e Sasada, Masahiro (25 November 2014). 国鉄&JR保存車大全2015-2016 (in Japanese). Tokyo, Japan: Ikaros Publications Ltd. p. 123. ISBN 978-4863209282. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  7. ^ 京都鉄道博物館. Japan Railfan Magazine (in Japanese). Vol. 56, no. 662. Japan: Koyusha Co., Ltd. June 2016. p. 4852-53. {{cite magazine}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  8. ^ Shibata, Togo (February 2016). 2016年「津山まなびの鉄道館」としてリニューアルオープン. Tetsudō Daiya Jōhō Magazine (in Japanese). Vol. 45, no. 382. Japan: Kōtsū Shimbun. p. 46-47. {{cite magazine}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
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