 They entered service as DRC42 (formerly PCH 1224) and DRC43 (formerly PCH 1227) in August and December 1975 respectively.Problems with reliability had emerged by the late 1970s, and a modification program was carried out at the Bendigo Workshops in 1983 and 1984.In 1974, four Harris suburban carriages were converted to MTH carriages for use as trailers with the DRC railcars.