page_title: EMD Class 66
section_title: Technical
hierarchical_section_title: EMD Class 66 / Technical
caption_attribution_description: Diesellokomotive Di 66.405 Trondheim 06.08.05
context_page_description: The Electro-Motive Diesel Class 66 are Co-Co diesel locomotives built by EMD for the European heavy freight market.
  Designed for use in Great Britain as the Class 66, a development of the Class 59, they have been adapted and certified for use in other European countries. Outside Europe, 40 locomotives have been sold to Egyptian Railways for passenger operation.
  A number of locomotives built for Euro Cargo Rail in France with roof-mounted air conditioning are classed Class 77. In Germany ECR units operated for DB Schenker were numbered as class 247, re-classified as class 266 by the Eisenbahn-Bundesamt to match other Class 66 locomotives operating in Germany.
context_section_description: The locomotive uses standard EMD components - an EMD 710 prime mover, D43 traction motors, radial (self-steering) bogies of patented design, which reduce wheel surface and flange wear and are said to improve adhesion and reduce track load.
  The class has undergone updates; other than the lower-geared class 66/6 produced for Freightliner, most of the updates have been in relation to conforming to specifications for exhaust particulate emissions.
  Despite being popular with rail operators, especially due to its high reliability, the class has not been universally successful: one recurring problem has been driver comfort. In particular, noise levels (including noise from the cab horn), vibration, and excessive cab-temperatures in hot weather have brought serious complaints. The cab is not isolated from the main frame, causing engine noise to be the dominant background noise; notwithstanding the implications for safety (audibility of warning signals etc.), and the potential for hearing damage in the long term, the conditions drivers face led to threats of industrial action in the UK in 2007, and an agreement for increased pay for drivers using this type of locomotive (in Norway). By modifying using noise absorbing materials EMD succeeded in meeting TSI Noise Certification standards in 2008. Tests on retrofitted cooling systems and improved seating have been carried out on some UK locomotives.
caption: CD66 of CargoNet, the air conditioning unit is visible above the cab
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