# JNR Class DE10

The Class DE10 (DE10形) is a class of Japanese C-B wheel arrangement diesel-hydraulic locomotives. 708 locomotives were built between 1966 and 1978. As of 1 April 2016, 138 locomotives remained in operation.

## Variants
### DE10-0 subclass

158 DE10-0 locomotives were built with steam heating boilers for passenger use.
None of this subclass remains in use on JR, but several examples operate on private railways. DE10 1 is preserved at JR Shikoku's Tadotsu depot.

### DE10-500 subclass

74 DE10-500 locomotives were built from 1968 with concrete ballast in place of the steam heating boilers for freight use. None of this subclass remains in use on JR, but several examples operate on private railways.

### DE10-900 subclass

One prototype locomotive, DE10 901, was built in 1967 as a heavy shunting locomotive with ballasting increasing the weight to 70 tonnes. This formed the basis for the Class DE11 design.

### DE10-1000 subclass

210 DE10-1000 locomotives were built from 1969 with steam heating boilers and uprated DML61ZB engines offering 1,350 hp (1,005 kW).

### DE10-1500 subclass

265 DE10-1500 locomotives were built from 1969 with uprated DML61ZB engines and concrete ballast in place of the steam heating boilers for freight use.

### DE10-3000/3500 subclass

JR Freight shunting locomotives rebuilt in 2009 from former JR East Class DE15 snow-plough locomotives. The conversion histories and former identities of this sub-class are as follows.
| Loco No. | Former No. | Date built | Manufacturer | Date converted | Date withdrawn |
| DE10 3001 | DE15 1001 | 6 December 1971 | Nippon Sharyo | 5 June 2009 | |
| DE10 3501 | DE15 1510 | October 1973 | Nippon Sharyo | 8 May 2009 | |
| DE10 3502 | DE15 1516 | 16 December 1975 | Nippon Sharyo | 7 April 2009 | 25 November 2009 |
| DE10 3503 | DE15 2567 | 14 January 1976 | Nippon Sharyo | 29 May 2009 | FY2011 |
| DE10 3504 | DE15 1522 | 2 March 1976 | Nippon Sharyo | 24 April 2009 | FY2011 |
| DE10 3505 | DE15 1523 | 9 March 1976 | Nippon Sharyo | 6 April 2009 | |
| DE10 3506 | DE15 1529 | 4 October 1976 | Kawasaki Heavy Industries | 15 May 2009 | |
| DE10 3507 | DE15 1530 | 7 October 1976 | Kawasaki Heavy Industries | 24 June 2009 | |
| DE10 3508 | DE15 1536 | 9 September 1977 | Kawasaki Heavy Industries | 7 April 2009 | |
| DE10 3509 | DE15 2505 | 21 October 1977 | Nippon Sharyo | 18 May 2009 | |
| DE10 3510 | DE15 2506 | 28 October 1977 | Nippon Sharyo | 19 May 2009 | |
| DE10 3511 | DE15 1539 | 10 November 1978 | Kawasaki Heavy Industries | 23 April 2009 | |
| DE10 3512 | DE15 2513 | 15 November 1978 | Kawasaki Heavy Industries | 12 May 2009 | |
| DE10 3513 | DE15 2524 | 20 November 1980 | Kawasaki Heavy Industries | 27 April 2009 | |
* ↑ Originally built as DE15 1517.

## Preserved examples

* DE10 1: Previously stored at JR Shikoku Tadotsu depot, and scheduled to be preserved at the Shikoku Railway Heritage Museum from July 2014

## Related classes

* Class DE11 heavy shunting locomotive
* Class DE15 snowplough propulsion unit

## Classification

The DE10 classification for this locomotive type is explained below.
* D: Diesel locomotive
* E: Five driving axles
* 10: Locomotive with maximum speed of 85 km/h or less