In order to replace train series 51 and 72 with the series 103 from April through September of the same year, 1975, thirty-five cars of type 103 (seven sets of five middle cars) and twenty-three cars of type 103 (four sets of five middle cars, one extra unit of two motor cars and one extra trailer car) were deployed at Akashi and Takatsuki depots respectively.
これらを置き換えるため、同年の4～9月にかけて103系を明石に35両（中間車5両×7本）、高槻に23両（中間車5両×4本+予備MM1ユニット+予備T1両）を投入した。