Hydraulic System133Service Manual – Advance 7765 / Nilfisk CR1500• The Auxiliary Pump is amultiple-gear pump. Twoseparate 1.02 CIR outputports power the other machinesystems.Note that the gas and dieselfitting configurations areslightly different, but the portfunctions are the same.Hydraulic Valves• The Main ControlValve controlsthe oil flow tothe main broommotor, dustcontrol motor,scrub brushmotors andhopper controlvalve.Note that thefunctions ofports 3 and 4will be reversedwhen the scrubmotors are runin the reverserotation.From ReservoirTo Port “P” onMain Control ValveTo Port “P” onPower Steering UnitTo SqueegeeVacuum MotorAuxiliaryPumpTo ReturnBlock/ManifoldFrom AuxiliaryPumpTo Port “2”on SideBroom ValveTo Bottom Porton MainBroom MotorTo DustControl MotorTo HopperControl ValveTo ScrubBrush MotorsFrom ScrubBrush MotorsMainControl Valve
