Ma 621F ndi 721F ali ndi mitundu inayi yamagetsi yomwe imalola ogwiritsa ntchito kufananiza makinawo ndi mphamvu zomwe zilipo.Zonyamulira zimaphatikizapo ma axle olemetsa okhala ndi zotsekera kutsogolo ndi masiyanidwe am'mbuyo otseguka kuti azitha kuyenda bwino mosiyanasiyana.Axle idapangidwa kuti izithandizira kuchepetsa kuvala kwa matayala, makamaka pamalo olimba, malinga ndi OEM.The 621F ndi 721F amapereka Phukusi Logwira Ntchito Losankha lomwe limaphatikizapo kutumiza maulendo asanu ndi makina otsekemera otsekemera kuti azithamanga mofulumira pamsewu, kuthamanga ndi nthawi zazifupi, komanso ma axles okhala ndi kusiyana kotsekera magalimoto ndi mapulogalamu apamwamba.Kutumiza kwa ma liwiro asanu kumaphatikizapo gawo la Case Powerinch lomwe limalola ogwiritsa ntchito kuyandikira zomwe akufuna mwachangu komanso mosatengera liwiro la injini.Case akuti izi zimatsimikizira kuti palibe kubweza kumbuyo ngakhale pamapiri otsetsereka, zomwe zimapangitsa kuti zikhale zosavuta komanso zachangu kutaya mgalimoto.