Museo virtuale Ferrovie Nord - AN 68 Breda second generation diesel railcars

At the end of the 1950s, the S.N.F.T. once again faced the necessity of upgrading its fleet, mainly due to the need to replace most of the first generation of diesel railcars which had now reached the end of their working life. It therefore ordered 4 diesel railcars from Breda in Sesto San Giovanni. These were largely the same as those being built for the F.S. of the class 2400 Aln668 type. The same order, also from Breda and again with the aim of upgrading the fleet, included 6 Cne510 type diesel-electric locomotives and 14 hauled units, of which 2 were equipped with baggage and mail cars. Putting this new stock into service made it possible to reduce and eventually eliminate steam traction on the public network, and eliminate the now out-of-date platform carriages. The diesel railcars arrived in Iseo in early 1960, were officially tested for service between the end of July and the beginning of August, and entered regular service on Sunday 4 September 1960.

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Technical description

Costruttore: Breda - Milano
Costruttore motori: I.F. Motori Breda
Larghezza: 2.900 mm

Massa in servizio: 42.000 kg
Rodiggio UIC: 2’B’
Cerchioni a nuovo Ø: 920 mm

Costruzione: 1960
Esercizio: 1960/1994
Sforzo di trazione massimo: 3.800 Kg

Passo carrelli: 2.500 mm
Numero motori: 2
Numero posti a sedere: 68

Lunghezza fuori tutto: 22.100 mm
Traino rimorchi: sì
Distanza perni carrelli: 15.200 mm

Potenza totale: 340 CV
Alimentazione: Nafta fluidissima
Builder: BREDA - Milan

Engine builder: I.F. Motori Breda
Width: 2,900 mm
Service mass: 42,000 kg

UIC wheel arrangement: 2’B’
Rim diameter when new: 920 mm
Build date: 1960

Service date: 1960/1994
Maximum tractive effort: 3,800 Kg
Bogie wheelbase: 2,500 mm

Engines: 2
Passenger capacity: 68 seats
Overall length: 22,100 mm

Trailer towing: yes
Distance between bogie pivots: 15,200 mm
Overall power: 340 hp

Fuel: Low viscosity diesel

Details

These railcars were very similar to their counterparts built by Breda for Ferrovie dello Stato, with a few differences: an increase in engine power from 99 kW to 125 kW, a reduction of the maximum speed from 110 km/h to 80 km/h, installation of a “dead man’s switch”, and the addition of an intercommunicating gate. Until 1977, they were classified as An68.111-114, later to become Aln68 and finally becoming ALn668.111-114. All four continued in service, initially as the core vehicles in the fleet, until 1988, when units 111 and 113 were withdrawn from service and retired. At the same time, units 112 and 114 were overhauled and were the first diesel railcars to receive the first variation of the public livery (see centre photo). They were mainly used on the flat section of the line, rarely going past Breno. With the arrival of the last diesel railcars in the Aln668.140 series over the course of 1994, these last two units were also removed from service and retired, and were scrapped a few years later.