Hariho no gusubiza inyuma mumashanyarazi avanga asfalt, mubisanzwe ntabwo bitera ibibazo, ntabwo rero numvise neza ibisubizo byayo mbere. Ariko mugukoresha nyabyo, nahuye nubu bwoko bwo gutsindwa. Nabyitwaramo nte?

Kunanirwa kwinyuma ya valve mumashanyarazi avanze ya asfalt ntabwo bigoye, nukuvuga, guhindukira mugihe kitaragera, kumeneka gaze, gutsindira amashanyarazi ya electromagnetic, nibindi. Impamvu hamwe nibisubizo birumvikana biratandukanye. Kubintu byo guhindagurika mugihe kitaragera cya valve isubira inyuma, mubisanzwe biterwa no gusiga amavuta nabi, amasoko yangiritse cyangwa yangiritse, amavuta cyangwa umwanda wafashwe mugice cyanyerera, nibindi. Kubwibyo, birakenewe kugenzura uko igikoresho cyamavuta gihagaze n'ubukonje bw'amavuta yo gusiga. Bibaye ngombwa, amavuta yo gusiga cyangwa ibindi bice birashobora gusimburwa.
Nyuma yo gukoresha igihe kirekire, valve isubira inyuma ikunda kwambara impeta ya kashe ya valve, kwangirika kuruti rwa valve hamwe nintebe ya valve, bikaviramo imyuka ya gaze muri valve. Muri iki gihe, impeta ya kashe, stem stem hamwe nintebe ya valve igomba gusimburwa, cyangwa valve ihinduranya igomba gusimburwa muburyo butaziguye. Kugirango ugabanye igipimo cyo kunanirwa kuvanga asifalt, kubungabunga bigomba gushimangirwa mubihe bisanzwe.