Zovala ziyenera kukhazikitsidwa m'malo oyera komanso oyera. Kulowa kwa tinthu tating'onoting'ono tidzakhalanso kufupikitsa moyo wautumiki wa kubereka. Ndikofunikira kwambiri kukhalabe oyera pokonzanso. Simaloledwa kugogoda kuyanjana ndi nyundo, ndipo samalani kuti musagwetse zonyamula pansi (kapenanso kugwirizanitsa). Chongani mkhalidwe wa shaft ndi mpando wonyamula musanakhazikitsidwe. Ngakhale kuvala pang'ono kumabweretsa kuyenera kukhala koyenera, chifukwa cholephera koyambirira kwa kubereka.
Kwa unit yonyamula unit, musayese kusokoneza khungu la HUB kapena kusintha mpheta yosindikiza ya chikhomo, apo ayi mphete yolimba idzawonongedwa ndipo madzi kapena fumbi lidzalowa. Ngakhale mpikisano wa mphete ya mphete ya mphete ndi mphete yamkati imawonongeka, chifukwa kulephera kosatha kwa kubereka.
