The MaK G 1204 BB is a four axle B'B' diesel-hydraulic off centre cab locomotive built by MaK

Maschinenbau Kiel

Maschinenbau Kiel GmbH designed, manufactured and marketed marine diesel engines, diesel locomotives and tracked vehicles under the MaK brand name. The three primary operating divisions of Maschinenbau Kiel GmbH were sold to different companies in the 1990s.Rheinmetall acquired the military...

 in Kiel, Germany. Eightenn of these light freight and shunting locomotives were built which were used mostly on German industrial railways, two units have worked for the Swiss Federal Railways and received the class designation Am 842.

History and design

The class are developent of the 1978 MaK G 1202 design; both locomotives have the same exterior dimensions but the G 1204 has a 1,120kW MTU

MTU Friedrichshafen

MTU Friedrichshafen GmbH is a manufacturer of commercial internal combustion engines founded by Wilhelm Maybach and his son Karl Maybach in 1909...

 12V 396 of slightly increased power over the MTU 12V 331 engine used in the G 1202.

Operators

Ruhrkohle AG operated 6 of the class, Wanne-Herner Eisenbahn und Hafen 2, NIAG 2, Osthannoversche Eisenbahnen 2, Westfälische Landes-Eisenbahn 2, and Sersa of Switzerland 3, with one locomotive operating under a number of different companies.

Two units originally working for Sersa

Sersa Group

-Operations:The company supplies services relating to rail track construction and renewals; including ballasted and slab track construction, cantenary construction, and project management...

 were transferred to the Swiss Federal Railways in 1993 and operate as SBB Am 842.000 and SBB Am 842.001.

See also

• List of stock used by Swiss Federal Railways
• MaK G 1206, higher powered development.

External links

• Images