SD5K o le ala-ituaiga aofaʻi atoa bulldozer hydraulic ma semi-maumaututū taofi, eletise pulea tiʻaga Ⅲ, lua-liʻo eletise pulea hydrostatic avetaʻavale faiga, eletise taofi faʻatonu tapunia avega lafo faʻatino faiga hydraulic.