Editing CIÉ 001 Class (section)

==Engines==

===Crossley===
Initially they were fitted with eight-cylinder [[two-stroke diesel engine|two-stroke]], port-controlled [[Crossley]] engines. These were a [[Two-stroke cycle#Loop-scavenged|loop scavenge]] type, which utilised a patented principle that recycled the normally wasted [[Exhaust pulse pressure charging|exhaust-pressure pulse]] to boost charge air in the cylinder. They produced {{convert|1200|hp|kW|abbr=on|lk=on|disp=flip}} at 625 [[Revolutions per minute|rpm]] and could do {{convert|120|km/h|abbr=on}}. The original [[sandbox (locomotive)|sandboxes]], which were used to improve traction with the rail, were removed after a few years.

Their Crossley engines proved to be notoriously unreliable from the start. Amongst a plethora of problems were:
* Unbalanced engines resulting in vibration-induced fuel pipe and water pipe fractures
* Cylinder defects
* Excessive water temperature causing shutdowns

There were also problems with generator and motor [[electric arc|flashovers]].

Similar problems were also encountered on the Crossley-engined [[WAGR X class|Western Australian Government Railways X Class]] and [[British Rail Class 28]] locomotives.

===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.