Renfe Class 310
The Renfe Class 310 is a class of 60 four axle Bo'Bo' diesel-electric locomotives for shunting and freight built by Meinfesa with General Motors Electromotive Division components (engine, electrical transmission). In the mid-2000s 4 units were converted to a subclass 310.1; a push-pull container train with a 310 class locomotive at each end; the units later became the property of Ferrocarrils de la Generalitat de Catalunya (FGC) and became the 353 Series. History and design. The Renfe 310 was ordered in the late 1980s as a replacement for the Renfe Class 307 and 308. The  order was part of a modernisation of the diesel shunting fleet in the 1980s which also resulted in the Renfe Class 309 and 311. The 310 Class is a variant of the General Motors SW1001 switcher with a modified cab shape. The locomotives were painted in the standard silver and red livery standard for Renfe shunting locomotives. As of 2010 the class are split between Adif and Renfe Mercancías. Class 310.1. 4 units have been converted to a formation known as "Medium Distance Teco" (TMD) (Spanish: "Teco de Media Distancia"); this is a service intended to move containerised freight a  distance between , and compete with road transport. Each train consists of 8 wagons and a class 310 locomotive at either end, with a container capacity of 24 TEU. The locomotives are connected by optical fibre. The 310.1 locomotives received modified cabs, similar to the design of the rebuilt Renfe 333.3 subclass. Later the two sets were sold to FGC and in 2009 began use transporting car parts to a SEAT factory. Under FGC ownership the units became the class FGC 353.