Crane tank locomotive

A crane tank locomotive is a steam locomotive fitted with a crane for working in railway workshops, docksides, or other industrial environments. The crane may be fitted at the front, centre or rear.
The 'tank' in its name refers to water tanks mounted either side of the boiler, as cranes were usually constructed on tank locomotives for greater mobility in the confined locations where they were normally used.
There is also a crane engine in the museum of Scottish railways

Preserved examples

Shelton Iron & [Steel Works No. 4101], an built by Dübs & Company built in 1901, entering preservation on the East Somerset Railway in 1970, working 1977-1986 and later sold to the Foxfield Railway, where it entered service in 2010.
Millfield, an built by Robert Stephenson & Hawthorns in 1942, preserved at Bressingham Steam & Gardens.