Renfe Class 340

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title: "Renfe Class 340" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["renfe-locomotives", "b-b-locomotives", "krauss-maffei-locomotives", "diesel-locomotives-of-spain", "5-ft-6-in-gauge-locomotives", "railway-locomotives-introduced-in-1966", "passenger-locomotives", "streamlined-diesel-locomotives"] description: "Class of Spanish diesel-hydraulic locomotive" topic_path: "geography/spain" source: "https://en.wikipedia.org/wiki/Renfe_Class_340" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Class of Spanish diesel-hydraulic locomotive ::

::data[format=table title="Infobox locomotive"]

Field	Value
name	Renfe Class 340
powertype	Diesel-hydraulic
image	File:340 020 Renfe.jpg
imagesize	300px
caption	Renfe 340 020 (previously 4020) in the National Railway Museum in Madrid
builder	Krauss-Maffei 4000 to 4010
4011 onwards: Babcock & Wilcox
builddate	1966
totalproduction	32
uicclass	B'B'
gauge
length	19.75 m (20.35 m over buffers)
width	3.08 m
height	4.26 m
locoweight	88 t
fuelcap	5000 L
primemover	2 Maybach diesel model MD 870
cylindercount	V16
transmission	Hydraulic Maybach Mekydro K 184 BT
maxspeed	130 km/h
poweroutput	2 x 2000 hp
operator	Renfe
locale	Spain
lastrundate	1987
::

| name = Renfe Class 340 | powertype = Diesel-hydraulic | image = File:340 020 Renfe.jpg | imagesize = 300px | caption = Renfe 340 020 (previously 4020) in the National Railway Museum in Madrid | designer = | builder = Krauss-Maffei 4000 to 4010 4011 onwards: Babcock & Wilcox | serialnumber = | buildmodel = | builddate = 1966 | totalproduction = 32 | rebuilder = | rebuilddate = | numberrebuilt = | whytetype = | aarwheels = | uicclass = B'B' | gauge = | trucks = | bogies = | wheeldiameter = | wheelbase = | length = 19.75 m (20.35 m over buffers) | width = 3.08 m | height = 4.26 m | frametype = | axleload = | locoweight = 88 t | fueltype = | fuelcap = 5000 L | coolantcap = | watercap = | consumption = | electricsystem = | collectionmethod = | primemover = 2 Maybach diesel model MD 870 | enginetype = | aspiration = | displacement = | alternator = | generator = | tractionmotors = | cylindercount = V16 | cylindersize = | transmission = Hydraulic Maybach Mekydro K 184 BT | maxspeed = 130 km/h | poweroutput = 2 x 2000 hp | tractiveeffort = | locobrakes = | trainbrakes = | safety = | multipleworking = | operator = Renfe | operatorclass = | numinclass = | fleetnumbers = | officialname = | nicknames = | locale = Spain | deliverydate = | firstrundate = | lastrundate = 1987 | retiredate = | restoredate = | scrapdate = | currentowner = | disposition =

The Class 340 of Renfe (4000 under the previous numbering scheme) were a class of 4-axle diesel-hydraulic locomotives built by Krauss-Maffei (and Babcock & Wilcox) for the Spanish Railways. The design is similar in outward appearance and technology to the DB Class V 200. 32 units were built.

Background and History

The locomotives had a total power of 4,000 hp from 2 motors (each a 16-cylinder Maybach/Mercedes-Benz MD870) diesel engine. Hydraulic transmissions used were two Mekydro K184.

The contract consisted of a series of 32 units which were shipped between 1966 and 1969, ten manufactured in Germany by Krauss-Maffei and the remaining twenty-two manufactured Spain by Babcock & Wilcox. The locomotives were similar to the V 200.1 Series of the Deutsche Bundesbahn, but with more power, more weight and slightly longer.

The units were conceived as locomotives for passenger services, with a maximum speed of 130 km/h, but then were also used for freight trains which together with inadequate maintenance led to many failures in this series.

None are currently in service and 30 of the 32 units have been scrapped, the 4020 (Renfe 340 020) is in the Museo del Ferrocarril de Madrid and the 4026 (Renfe 340 026) is in the process of being restored by the AZAFT (Asociación Zaragozana de Amigos del Ferrocarril y Tranvías).

References

References

1. [https://www.wefer.com/w5/renfe/340.htm Serie 340 (ex 4000)] Class 340 (formerly 4000) ''wefer.com''
2. [https://v200-116.de.tl/Renfe-340.htm?PHPSESSID=6343b0b893078ca44bfc009cb8a9f00a RENFE 340] ''v200-116.de''
3. [http://www.museodelferrocarril.org/colecciones/nueva_traccion/4020.htm Colecciones: Sala de Tracción – Diesel: 4020 Krauss-Maffei] {{webarchive. link. (4 March 2009 ''museodelferrocarril.org'')

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