SBB-CFF-FFS Bm 4/4

The Bm 4/4 is a heavy diesel shunter built for Swiss Federal Railways. 46 examples were built between 1960 and 1970, and a number remain in service. The class is currently being replaced by new Vossloh locomotives.

SBB-CFF-FFS Bm 4/4
Type and origin
Power typeDiesel
BuilderSLM, SAAS
Build date1960–1970
Total produced46
Specifications
Configuration:
​
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8 1⁄2 in)
Length12,650–13,710 mm (41 ft 6 in–45 ft 0 in)
Loco weight72 tonnes (70.9 long tons; 79.4 short tons)
Traction motorsFour
TransmissionDiesel electric
Performance figures
Maximum speed75 km/h (47 mph)
Power output620 kW (831 hp)
Career
OperatorsSBB-CFF-FFS
Numbers18401–18446
WithdrawnFrom 2006

See also
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