MasterofDiaster221
Member
I got a Hitachi ex35 that all functions are slow. All hydraulic filters have been changed including pilot pressure filter and fluid. I also pulled out the suction strainer and it was clean.I bought a hydraulic flow tester and when hooking into pump one or two machine will push about 5 gallons at about 1000psi at fast idle. Once you get to about 1500 psi it drips below 2 gallons a min. Service manual says at 2000psi min. Acceptable is 6.6gpm and at 3000psi minimum acceptable is 6.4gallins. I took pumps off and sent them hydraulic express to be rebuild 2k later I still have the same issues. I checked all hose clamps going from suctions to the pump and all was tight just looking as to what to look into next