Pump 2Pump 1SignalControlValvePilot Pump &AccumulatorArm Joystick ControlSignalControlValveSignalControlValveExcavator BoomIs RisingArm RollInOutGravityGravityPilot Pressure FromSolenoid Valve Unit (SG)CylinderPausedMainRelief ValveArmCylinderArm Flow RateControl Valve(Poppet Valve)Arm Flow Rate ControlValve (Switch Valve)Arm 2 DCVArm Anti-DriftSwitch ValveArm Anti-DriftCheck ValveLoad Check Valve(Arm 1 Tandem Circuit)Check Valve (Arm 1 Roll-OutParallel Circuit)Arm RegenerativeValve (Switch Valve)Check Valve(Arm Make-Up Circuit)Arm 1 DCVRoll-inRoll-outArm Regenerative Circuit6: 00To Boom DCVLow PressureHigh PressureVacuum PressureDrain PressureColors LegendMedium Pressure