SNCF Class Y 7400

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.

Class Y 7400
Y 7832 at Gare de Neussargues, Cantal
Type and origin
Power typeDiesel
Builder Billard
Decauville
De Dietrich
Moyse
Build date1959, 1963-72
Total produced1 + 488
Specifications
Configuration:
​
 • Whyte0-4-0
 • UICB
Gauge1,435 mm (4 ft 8 1⁄2 in) standard gauge
Driver dia.1,050 mm (3 ft 5 in)[1]
Wheelbase3,685 mm (12 ft 1.1 in)[1]
Length8,940 mm (29 ft 4 in)[2]
Loco weight32 tonnes (31 long tons; 35 short tons)[2]
Fuel typeDiesel
Prime moverPoyaud 6PYT[2]
Engine typeDiesel
TransmissionMechanical Transmission (mechanics)?
Performance figures
Maximum speed60 km/h (37 mph)[2]
Power output129 kW (173 hp)[1]
Tractive effort73 kN (16,000 lbf)[2]
Career
OperatorsSNCF
ClassY7400
NumbersY7001, Y7401–Y7888

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

Operators

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] 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]

Some of them are preserved by tourist railroads.

References
  1. Haydock, David (1986). Motive power recognition: 5 SNCF French Railways (First ed.). Shepperton, Surrey UK: Ian Allan Publishing. ISBN 0-7110-1637-2.
  2. 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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