Editing CIÉ 001 Class (section)

===EMD===
These problems were tackled between 1968 and 1971 through the progressive re-engining of the entire class with a {{convert|1650|hp}} 12-cylinder [[EMD 645]]E engine (a similar process was implemented for the original [[CIÉ 201 Class|201 Class]]). However, this power output stressed the ability of the original cooling and transmission systems and the engine output was reduced to {{convert|1325|hp}} for improved reliability. When built, these locomotives were originally numbered A1 to A60, and as locomotives were re-engined, they had the suffix 'R' added to their number. From 1972, the prefix letters were dropped and the locomotives were renumbered 001 to 060.