SNCF Class Y 7400

Class Y 7400
Y 7832 at Gare de Neussargues, Cantal
Type and origin Power type Diesel Builder Billard Decauville De Dietrich Moyse Build date 1959, 1963-72 Total produced 1 + 488
Specifications Configuration: ​  • Whyte 0-4-0  • UIC B Gauge 1,435 mm (4 ft 8+1⁄2 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]
Career 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.