JNR Class DD14
# JNR Class DD14

The Class DD14 (DD14形) was a B'B' wheel arrangement diesel-hydraulic locomotive type operated in Japan as a self-propelled rotary snowplough unit from 1961 to 2015 by the national railway company Japanese National Railways (JNR), and later by East Japan Railway Company (JR East). West Japan Railway Company (JR West), and Hokkaido Railway Company (JR Hokkaido).

## Design

Based on the earlier Class DD13 6th-batch locomotives, the Class DD14 was a single-end-cab design with a rotary snowplough unit at the cab end. It was the first diesel-powered rotary snowplough built by JNR. The locomotives had two 500 hp (370 kW) diesel engines. One engine could be used for propulsion with the other driving the rotary snowplough unit, giving a snow-clearing capacity of approximately 3,000 tonnes per hour, or the unit could be operated in multiple with a second locomotive allowing both engines to drive the rotary snowplough, giving a snow-clearing capacity of approximately 4,000 tonnes per hour.

* Snowplough detail of DD14 317, October 2001
* A pair of DD14s with their snowplough units detached, March 2008

## Variants

* DD14-0: 8 locomotives built between 1961 and 1965 by Kisha Seizō
* DD14-300: 35 locomotives built between 1966 and 1979 by Kisha Seizō and Kawasaki Heavy Industries

## History

By 2005, only nine locomotives remained in service, all operated by JR East. The last remaining locomotives in service, DD14 327 and 332, based at JR East's Nagaoka Depot, made their final run on 24 February 2014.

## Fleet list

| Locomotive number | Manufacturer | Year built | Works no. | Date withdrawn |
| - | - | - | - | - |
| DD14 1 | Kisha Seizō | 1961 | 2861 | ? |
| DD14 2 | Kisha Seizō | 1961 | 2907 | 30 December 1985 |
| DD14 3 | Kisha Seizō | 1961 | 2908 | 10 September 1996 |
| DD14 4 | Kisha Seizō | 1965 | 3152 | ? |
| DD14 5 | Kisha Seizō | 1965 | 3153 | ? |
| DD14 6 | Kisha Seizō | 1965 | 3154 | 1 December 1994 |
| DD14 7 | Kisha Seizō | 1965 | 3155 | 1 June 1995 |
| DD14 8 | Kisha Seizō | 1965 | 3171 | 5 November 1998 |
| DD14 301 | Kisha Seizō | 1966 | 3222 | 1 August 1994 |
| DD14 302 | Kisha Seizō | 1966 | 3223 | 14 February 1990 |
| DD14 303 | Kisha Seizō | 1966 | 3224 | 24 March 1993 |
| DD14 304 | Kisha Seizō | 1966 | 3225 | 24 March 1993 |
| DD14 305 | Kisha Seizō | 1966 | 3226 | 2 April 2009 |
| DD14 306 | Kisha Seizō | 1966 | 3227 | 25 July 1998 |
| DD14 307 | Kisha Seizō | 1968 | 3260 | 14 February 1990 |
| DD14 308 | Kisha Seizō | 1969 | 3261 | 18 June 2009 |
| DD14 309 | Kisha Seizō | 1969 | 3410 | 16 June 2000 |
| DD14 310 | Kisha Seizō | 1969 | 3437 | ? |
| DD14 311 | Kisha Seizō | 1970 | 3486 | 31 March 2000 |
| DD14 312 | Kisha Seizō | 1971 | 3528 | 30 December 1989 |
| DD14 313 | Kisha Seizō | 1971 | 3541 | 17 March 1990 |
| DD14 314 | Kisha Seizō | 1971 | 3542 | 7 April 2003 |
| DD14 315 | Kisha Seizō | 1971 | 3543 | 25 December 1998 |
| DD14 316 | Kawasaki | ? | ? | 29 March 1996 |
| DD14 317 | Kawasaki | ? | ? | 30 May 2008 |
| DD14 318 | Kawasaki | ? | ? | 17 March 1990 |
| DD14 319 | Kawasaki | ? | ? | 17 December 1992 |
| DD14 320 | Kawasaki | ? | ? | 24 March 1993 |
| DD14 321 | Kawasaki | ? | ? | 24 March 1993 |
| DD14 322 | Kawasaki | ? | ? | 28 January 1994 |
| DD14 323 | Kawasaki | ? | ? | 27 September 1993 |
| DD14 324 | Kawasaki | ? | ? | 13 July 1994 |
| DD14 325 | Kawasaki | ? | ? | 23 April 2004 |
| DD14 326 | Kawasaki | ? | ? | 14 June 2002 |
| DD14 327 | Kawasaki | ? | ? | 2015 |
| DD14 328 | Kawasaki | ? | ? | 28 September 2009 |
| DD14 329 | Kawasaki | ? | ? | 29 March 1996 |
| DD14 330 | Kawasaki | ? | ? | 1 November 1994 |
| DD14 331 | Kawasaki | ? | ? | 3 July 2003 |
| DD14 332 | Kawasaki | ? | ? | 2015 |
| DD14 333 | Kawasaki | ? | ? | 21 June 2008 |
| DD14 334 | Kawasaki | ? | ? | 21 May 2010 |
| DD14 335 | Kawasaki | ? | ? | 31 March 2000 |

## Preserved examples

As of 2012, three Class DD14 locomotives are preserved in Japan, with one locomotive sold to Taiwan High Speed Rail (THSR) in Taiwan.

* DD14 1: Preserved at the Mikasa Railway Museum in Mikasa, Hokkaido
* DD14 312: Preserved privately in Kitami, Hokkaido
* DD14 323: Preserved at the Otaru Museum in Otaru, Hokkaido
* DD14 331: Owned by THSR in Taiwan
* DD14 1 at the Mikasa Railway Museum, May 2007
* DD14 312 in August 2009
* DD14 323 at the Otaru Railway Museum, July 2007
* DD14 331 in Taiwan, August 2008

## Related classes

* Class DD15 snowplough propulsion unit
* Class DD16 snowplough propulsion unit
* Class DD18 snowplough propulsion unit
* Class DD19 snowplough propulsion unit
* Class DD53 snowplough propulsion unit
* Class DE15 snowplough propulsion unit

## Classification

The DD14 classification for this locomotive type is explained below.

* D: Diesel locomotive
* D: Four driving axles
* 14: Locomotive with maximum speed of 85 km/h or less
