Uhlobo lweJA luyi-wiper eqhelekileyo yokuphucula umphumo wokutywinwa ngokubanzi.
Umsesane ochasene nothuli usetyenziswa kwi-hydraulic kunye ne-pneumatic piston rod.Umsebenzi walo oyintloko kukususa uthuli olufakwe kwindawo yangaphandle ye-piston cylinder kunye nokukhusela isanti, amanzi kunye nokungcola ekungeneni kwi-cylinder evaliweyo.Uninzi lwezitywina zothuli ezisetyenzisiweyo zenziwe ngezinto zerabha, kwaye uphawu lwalo lokusebenza kukukhuhlana okomileyo, okufuna ukuba izixhobo zerabha zibe nokuxhathisa okufanelekileyo kokunxiba kunye nokusebenza okuphantsi koxinzelelo.