1.Iphampu iklanywe ngokunemba nokuqina engqondweni ukuze kuqinisekiswe ukusebenza kwenjini okuhlala isikhathi eside nokupholisa kahle
2.Kwenziwe ngezinga eliphezulu kakhulu, kusetshenziswa izinto ezisezingeni eliphezulu kanye nobuchwepheshe obuphambili ukuze kuhlinzekwe ukwethembeka nokusebenza okuphakeme.
3.Iphampu yamanzi iyingxenye ebalulekile yesistimu yokupholisa imoto futhi inomthwalo wemfanelo wokuzungeza into epholile ngenjini ukuze igcine izinga lokushisa elifanelekile lokusebenza.