The largest series of gearboxes manufactured by CFD
The Asynchro gearbox cardanically drives a reduction shuttle which is connected by chains to both axles.
General characteristics
With 489 units, the Y 7400 is the largest series of locotractors ever made in France. Equipped with a CFD Asynchro gearbox, they were successively built by Decauville, De Dietrich then Moyse.
Features Y 7400
| Features | Values |
| Total weight | 32 tonnes |
| Longueur | 8940 |
| Bogie pivot spacing | 3685 |
| Wheel diameter | 1050 |
| Maximum speed | 60 km/h |
| Rim effort | tons |
| Minimum curved track | 80 m |
| Diesel Poyaud 6PYT | 156 kw |
| Speed box | CFD | sync
Power curve
De-archiving in progress
