Chigawo cha sefa yamafuta a nsagwada zitatu, chomwe chimadziwikanso kuti sefa yamafuta a nsagwada zitatu, ndi chida chopangidwira kusintha zosefera zamafuta mu injini zamagalimoto. Nthawi zambiri zimakhala ndi nsagwada zitatu zosinthika zomangitsa ndikuchotsa zosefera zamitundu yosiyanasiyana. Chidachi chimagwiritsidwa ntchito posintha mafuta kuti athandizire kuchotsa ndikuyika zosefera zamafuta.
Mawonekedwe a wrench yamafuta a nsagwada zitatu ndi awa:
Mukamagwiritsa ntchito wrench yamafuta a nsagwada zitatu, onetsetsani kuti nsagwada zasinthidwa bwino kukula kwake kuti zigwirizane ndi fyuluta, zomangika bwino ndikuyika mphamvu yokwanira kuchotsa kapena kukhazikitsa fyulutayo. Chida ichi chingathandize kukonza kusintha kwa mafuta kukhala kosavuta, kuonetsetsa kuti injini yanu ikuyenda bwino komanso kuti ikugwira ntchito bwino.