Ama-servo-valve aqondisayo angama-hydraulically pilot asebenza isigaba esi-2 noma ama-valve aqondisayo wesiteji esi-3. Ngenxa yokuguquguquka kwawo okuphezulu asetshenziswa kakhulu ekulawuleni iluphu evaliwe yendawo, amandla noma ingcindezi, kanye nesivinini. I-Bosch Rexroth hydraulic servo-valve ihola ekulawuleni ingcindezi, ukugeleza noma isikhundla.