The class survived through the Great Southern Railways (GSR) era from 1925-1944 and were withdrawn in the 1950s under Córas Iompair Éireann.
Their large driving wheels caused low acceleration and difficulties on gradients so they were deployed to Dublin-Galway slow passenger work.
Poor riding also led to a high incidence of breaking of bogie springs.
[3] The class were rebuilt with superheated boilers and new cabs over their long lives beginning in the 1920s.
[2] When introduced the locomotives carried an apple green livery with black edged with white lining.