They were used on most if not all of the short branches, Athboy, Killeshandra, Edenderry. Achill and Clifden branches as well, although think they were banned in later years, both of those would be a bit of a strain on a small tank with limited fuel and water. After amalgamation, DSE section, Tramore as you say, Courtmac, Cork City and quays, Fenit branch.