An bayyana hanyar sarrafa matsi na baya don injin gyare-gyaren hydraulic. Wannan hanyar tana samun ikon sarrafa matsa lamba na baya yayin lokacin ajiyar kayan ta hanyar shigar da bawul ɗin sarrafawa ta farko, bawul ɗin sarrafawa ta biyu, firikwensin matsa lamba, da bawul ɗin magudanar ruwa tsakanin silinda allura da tankin mai. Lokacin da injin gyare-gyaren allura na hydraulic ya shiga lokacin ajiyar kayan.
Ana buɗe tashoshin A da T na bawul ɗin sarrafawa na farko, suna fara dawo da mai. Mai daga baya na silinda allura yana gudana zuwa tankin mai ta hanyar bawul ɗin sarrafawa na farko da bawul ɗin magudanar ruwa. A lokaci guda, ana buɗe tashoshin B da P na bawul ɗin sarrafawa na biyu, barin mai daga tankin mai ya kwarara zuwa bayan silinda mai allura ta famfon mai da bawul ɗin sarrafawa na biyu. A wannan lokacin, mai kula da PID yana ci gaba da tattara ƙimar matsa lamba da aka gano ta hanyar firikwensin matsa lamba kuma yana ƙayyade kwanciyar hankali na baya dangane da ƙimar da aka tattara. Lokacin da matsa lamba na baya ba ta da ƙarfi, mai kula da PID yana sarrafa saurin fitarwa na famfon mai na injin allurar hydraulic ta hanyar sarrafa motar don daidaita matsa lamba na baya. Fa'idar ita ce babban daidaiton sarrafawa, yana ba da ikon sarrafa matsi na baya mai girma{5}.
