Sefe ea letoto la li-SRFA e entsoe ka li-filterfilters tse le 'ngoe tsa sekotlolo, e 2-position 3 -way directioal valve, by-pass valve, indicator le diffuser. E bonolo ka sebopeho ebile e bonolo ho e sebelisa. E manehiloe ka holim'a tanka; ho na le "valve" ea "pass" le "pollution" ho eona bakeng sa ts'ireletso ea hydraulic system. Karolo ea sefahla sena e lumella ts'ebetso e tsoelang pele leha e ntse e nkela sebaka, e koetsoeng ke litšila. Ha sesebelisoa se koetsoe ke litšila se hlahisang khatello e fihlellang ho 0.35MPa sesupo se tla fana ka matšoao. Ka nako ena, sotha li-inal directional hore li etse lintho tse ling ebe o fetola element.