By utilizing these cars, the Osaka Railway Bureau began to operate seven-car trains all day long like at present in 1963 (four-car trains were still operated during the daytime, and all trains became a seven-car train as of March 15, 1972).
しかし、これらの車両を活用して1963年には現在同様終日7連化を実施（昼間時を中心に4連運行が残っていたため、完全7連化は1972年3月15日）した。