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I-bulldozer yokulawula i-valve block iyinxalenye yolawulo oluphambili lwenkqubo ye-hydraulic, eyona nto isebenzayo ukufezekisa ulawulo oluchanekileyo lokunyuswa, ukunyathela, ukuhamba kunye nezinye izenzo zeplate ye-bulldozer ngokulungelelanisa ulwalathiso lokuhamba, uxinzelelo kunye nesantya sokuhamba kweoli ye-hydraulic. Ulwakhiwo lwayo ludibanisa iinxalenye ezinje ngomzimba wevalve, iivalvu, iipayipi, kunye namacandelo olawulo. Umzimba wevalvu, njengowona mzimba uphambili, uhlala uphoswa okanye umatshini, kwaye uqulethe iivalve ezininzi kunye nemibhobho ngaphakathi. Amacandelo olawulo (njengama-valve e-solenoid kunye ne-hydraulic directional valves) anoxanduva lokutshintsha i-oyile yesiphaluka sesiphaluka.Indibano yepompo ye-oyile: ibonelela ngamandla ombane we-hydraulic inkqubo yokuhamba ye-bulldozer, echaphazela ngokuthe ngqo isantya sokuhamba kwesixhobo, ukutsalwa, kunye nokuhamba. Ngokomzekelo, i-bulldozer enesondo ixhomekeke kumpompo wokuhamba ukuphumeza ukudluliselwa ngokukhawuleza, ngelixa i-bulldozer elandelwayo ilungisa umlinganiselo wayo woxinzelelo lomhlaba kunye nokukwazi ukunyuka nge-24. Indibano yepompo yokusebenza: iqhuba izenzo zokuphakamisa, ukunyathela, kunye nokujikeleza kweplate ye-bulldozer, ukuqinisekisa ukulawulwa ngokuchanekileyo kokusabalalisa izinto eziphathekayo, ukulinganisa umhlaba, kunye nokudlala ngokufanelekileyo umgama omfutshane wokujikeleza kwe-0 kwiimitha zokusebenza ezimfutshane, ngokukodwa kwi-1 imitha yokusebenza engundoqo.