They were noted as being prone to derailment on sidings which could have sharp curves and be poorly ballasted, though thin flanges on the middle driving wheels combined with a long wheelbase and additional weight on the leading axle may equally have been factors. Engine 900 was later converted to a [4-6-2T] by removing the coupling rods to the rear driving wheels.[1]: 124–125
Engine 901 was introduced nine years after 900 by J.R. Bazin, and was the only engine to be introduced by the Great Southern Railway which existed for less than two months before being joined with the Dublin and South Eastern Railway to form Great Southern Railways (GSR).[1]: 124–125
The engines were not particularly successful and were regarded as surplus to requirements and withdrawn after a short life by 1931 as it was found their work could be adequately performed by standard locomotives.[1]: 124–125 [2]
