Belgian Railways Class 77

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Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters". The NMBS/SNCB Class 77 (also known as HLD 77 or HLR 77) is a class of 4 axle B'B' road switcher diesel hydraulic locomotive designed for shunting and freight work manufactured at the beginning of the 2000s by Vossloh Schienentechnik/Vossloh Locomotives at the Maschinenbau Kiel plant in Kiel, Germany for the National Railway Company of Belgium (SNCB/NMBS).

Background and design

The initial order for 90 locomotives was given to Siemens in 1997 to replace an aging diesel fleet; the railway opted for a locomotive suitable for both shunting and mainline use, rather than separate classes.[1] Siemens sold its locomotive manufacturer division (Siemens Schienenfahrzeugtechnik) to Vossloh in 1998.[2]

The locomotives were variants of the standard MaK G 1200 series design,[3] and are considered a development of the MaK G 1205 type.[4] The locomotive is an off-centre cab design with a two-speed Voith hydraulic transmission driving all axles via cardan shafts.[3] Auxiliary electrical supply is provided by an engine mounted alternator.[1] Unlike many other MaK locomotives which use a MTU or CAT 12-cylinder V engine the locomotive has an ABC 6-cylinder inline engine.[5]

The first locomotive was delivered in October 1999, and worked satisfactorily; a second order for 80 locomotives was given in June 2001.[1][6]

Operations

The first locomotive entered service in February 2004.[7] All 170 units were operational by June 2005.[8]

Due to its relatively low power the locomotives work in multiple on heavy freight trains.

Equipment variations

Sets of the class vary in the type of equipment they carry:[1]

NMBS/SNCB
number 		Radio
control 		Cab
Radio 		ATB Notes
7701–7708 Yes Yes No Fitted with automatic coupler for hill shunting; not approved for Netherlands
7709–7728 Approved for limited operations in Netherlands[6]
7729–7770 No
7771–7790 Yes Approved for Netherlands[9] and Germany (2004);[10] fitted with PZB system
7791–7865 No No Can operate in Netherlands when in multiple with locos with ATB or radio[9]
7866–7870 ~ Yes Fitted with ATB and PZB in 2008 for work in Germany (Iron Rhine line)[11]

See also

  • NS Class 6400 similar concept diesel electric freight locomotives built by MaK/Siemens between 1988 and 1995 for the railways of the Netherlands.

References

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External links

Template:Sister project

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