Iqukethe i-trigger eyenza ipompo encane yamanzi isebenze. Iphampu ixhunywe neshubhu lepulasitiki elidonsa uketshezi oluhlanziwe ngaphansi kwechibi. Iphampu iphoqa uketshezi ukuthi lungene egumbini elincane ngaphambi kokulukhipha ngembobo encane embotsheni yesifafazi.. Lo mgodi, noma umlomo, iqoqa uketshezi ukuze idale umfudlana ogxilile. Iphampu ye-hydraulic iyona kuphela ingxenye eyinkimbinkimbi kulo mklamo, kodwa futhi kulula kakhulu ukwakha.
Ingxenye yayo eyinhloko enyakazayo iyipiston equkethwe ngaphakathi kwe-cylindrical hydraulic chamber. Kukhona isiphethu esincane ekamelweni elisebenza nge-hydraulic. Ukuqala iphampu ye-hydraulic, kufanele idonswe emuva, okuvumela i-piston ukuthi iqhubekele egumbini le-hydraulic. Lapho isikrufu sikhululwa, i-piston iphushwa ngaphandle kwe-hydraulic chamber ngoba i-piston ihamba ngokucindezela isiphethu. Umjikelezo wephampu ophelele wakhiwa imivimbo emibili yepiston engena nangaphandle kwegumbi le-hydraulic.
