| LMS 1831 | |
| Powertype: | Diesel Hydraulic |
| Builder: | LMS, Derby Works |
| Builddate: | 1931 |
| Whytetype: | 0-6-0DH |
| Totalproduction: | 1 |
| Wheeldiameter: | 4feet |
| Wheelbase: | 15feet |
| Length: | 30feet |
| Width: | 8feet |
| Height: | 12feet |
| Enginetype: | 6-cyl |
| Maxspeed: | 250NaN0 |
| Poweroutput: | 4000NaN0 at 750 rpm; later 3000NaN0 |
| Transmission: | Haslam & Newton |
| Tractiveeffort: | 224001NaN1
|
| Locobrakes: | Air brake (independent) |
| Trainbrakes: | Vacuum brake |
| Operator: | London, Midland and Scottish Railway |
| Fleetnumbers: | 1831 |
| Deliverydate: | Testing: December 1932; In stock: May 1934 |
| Withdrawndate: | September 1939 |
| Disposition: | Rebuilt 1940 in to mobile power unit; scrapped August 1951 |
LMS diesel shunter No. 1831 was an experimental diesel hydraulic shunter built by the London, Midland and Scottish Railway (LMS) in 1931/3, which pioneered diesel shunting in the UK.
It was ordered in 1931 from the Midland Railway's Derby Works and delivered in December 1932, nominally a rebuild of a Midland Railway 1377 Class 0-6-0T steam locomotive of the same number, built in September 1892 by the Vulcan Foundry.[1] The frames and running gear of the original locomotive were retained.[2] It had a Davey Paxman 6-cylinder 4000NaN0 at 750 rpm engine (later converted to 3000NaN0and a Haslam & Newton transmission.
After initial testing, the locomotive entered stock in May 1934, but was not successful in ordinary service. The locomotive was put into storage in 1936 and officially withdrawn from service in September 1939. It was converted to a mobile power unit, emerging in its new guise as MPU3 in November 1940. It was scrapped in August 1951.[3]