Steering System221Service Manual – Advance 7765 / Nilfisk CR1500Turning the Steering Wheel with the Engine OffWhen the engine is off and nohydraulic oil is being pumped tothe Power Steering Unit, the GerotorMetering Mechanism acts like apump when the steering wheelis turned. The Check Valve allowsthe oil pumped from the GerotorMetering Mechanism to flow to andfrom the Power Steering Cylinderto allow the machine to be steeredmanually with the engine off.PowerSteeringUnit1500PSI3.05CIRPTPower SteeringCylinderL RReservoirAuxiliaryPump1.02CIR1.5 GPMTo CylinderControl ValveTo SqueegeeVacuum MotorGerotorMeteringMechanismDirectMechanicalLinkDrive Wheel MovesWhen SteeringWheel is TurnedValveCheckValve
