Okwamanje, ingcindezi esegumbini lokufaka i-oyili ingaphezulu kakhulu, ngoba ingcindezi yomshini we-hydraulic inkulu kakhulu, ngakho-ke i-valve yokulandelana iyadingeka ukulungisa inqubo ukusuka kwengcindezelo yokubamba ukuya ekushayweni okusheshayo kokubuyela emuva .. Lokhu kungavimba ukwenzeka kwengcindezi ephezulu ethinta izingxenye ze-hydraulic. Kungenza inqubo yokulayisha imigwaqo kawoyela ibushelelezi. Ukuze kufezekiswe isidingo sokubheka ingcindezi yesekethe kawoyela, kufanele kufakelwe i-valve yokusiza ekufakweni kwephampu ye-hydraulic, futhi ngasikhathi sinye, ingavikela nohlelo lwe-hydraulic ekulayini ngokweqile