SNCF Class Y 7400

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Class Y 7400
SNCF loco 7832.jpg
Y 7832 at Gare de Neussargues, Cantal
Type and origin
Power type Diesel
Builder France Billard
France Decauville
France De Dietrich
France Moyse
Build date 1959, 1963-72
Total produced 1 + 488
 • Whyte 0-4-0
 • UIC B
Gauge 1,435 mm (4 ft 8 12 in) standard gauge
Driver dia. 1,050 mm (3 ft 5 in)[1]
Wheelbase 3,685 mm (12 ft 1.1 in)[1]
Length 8,940 mm (29 ft 4 in)[2]
Loco weight 32 tonnes (31 long tons; 35 short tons)[2]
Fuel type Diesel
Prime mover Poyaud 6PYT[2]
Engine type Diesel
Transmission Mechanical Transmission (mechanics)?
Performance figures
Maximum speed 60 km/h (37 mph)[2]
Power output 129 kW (173 hp)[1]
Tractive effort 73 kN (16,000 lbf)[2]
Operators SNCF
Class Y7400
Numbers Y7001, Y7401–Y7888

The Y 7400 class of small shunters is France's most numerous with 488 locomotives in the production build. The first 120 were built by Decauville, with further batches built by De Dietrich (105) and Moyse (263). They have the 0-4-0 ("B") wheel arrangement, 150 kW diesel engines and mechanical transmission. They can be found all over the French network.

During 1959 Y 7192 was converted to mechanical transmission and renumbered as Y 7001. This locomotive was the prototype for the Y7400 class.


In addition to the locomotives operated by SNCF, RATP have two Y 7400 class locomotives built in 1969 by Moyse. They are numbered T 102 & T 103 and were not part of the SNCF fleet.[2][page needed] Likewise VFLI have two Y 7400 locomotives, 088 & 089, which were originally built for CFD. VFLI have augmented their fleet with Y 7474 and Y 7684 purchased from SNCF.[2][page needed]

Only Y 7566 has been preserved. It is based at Chemins de Fer de Blaise-et-Der, Wassy.[2][page needed]


  1. ^ a b c Haydock, David (1986). Motive power recognition: 5 SNCF French Railways (First ed.). Shepperton, Surrey UK: Ian Allan Publishing. ISBN 0-7110-1637-2. 
  2. ^ a b c d e f g h Haydock, David (2008). European Handbook No. 4 French Railways Locomotives & Multiple Units (Fourth ed.). Sheffield, UK: Platform 5 Publishing Ltd. ISBN 978-1-902336-65-7. 

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