Waalka dib-u-celinta hawo-mareenka ee dhirta isku-darka asphalt guud ahaan uma nugul fashil, laakiin marmar waxaa laga yaabaa inuu jiro isbeddel weji aan waqtigiisa ku jirin, daadinta gaaska, valve pilot induction electromagnetic, iwm, iyo sababaha cilladda u dhigma iyo hababka daawaynta ayaa dabiici ahaan kala duwan.

Haddii waalka dib-u-celinta haydarooliga uusan isbeddelin marxaladda waqtiga, inta badan waxaa sababa dhammays-xumada, guga ku dhegan ama dhaawacan, saliidda wasakhda ama haraaga oo ku dheggan qaybta jiidista, iwm. Waa lagama maarmaan in la hubiyo xaaladda triplex pneumatic iyo viscosity ee dufanka. Haddii loo baahdo, dufanka ama qaybaha kale waa la bedeli karaa.
Inta lagu jiro isticmaalka muddada dheer, haworooliga rogida ee warshadda isku darka asphalt waxay u nugul tahay inay dhaawacdo giraanta xidhida xudunta u ah waalka, kursiga valve iyo waalka iridda cadaadis-sare, taasoo keenta daadinta gaaska waalka. Waqtigan xaadirka ah, giraanta daboolka, kursiga valve iyo waalka albaabka cadaadiska sare waa in la beddelaa, ama waalka dib u rogaya hawo-qaadista waa in la beddelaa wakhtiga.
Sidaa darteed, si si wax ku ool ah loo yareeyo heerka fashilka qalabka ee warshadda isku dhafka asphalt, sidoo kale waa lagama maarmaan in fiiro gaar ah loo yeesho dayactirka mashiinnada iyo qaybaha.