SYSTEM/Hydraulic System Lift Arm Pilot Valve Bucket Pilot Valve Spare Pilot Valve (Optional) Pilot Shutoff Valve To Service Brake Circuit Service Brake Accumulators Priority Valve Relief Valve B Pilot Relief Valve Pilot Pump A Hydraulic Oil Tank Spring X PS1 PS2 Pump Torque Control Solenoid Valve Parking Brake Pressure Sensor BR3 Parking Brake Solenoid Valve T4GB-02-02-020 PP Charging Block NOTE: Illustration shows the oil flow in neutral condition of the pilot valve when the service brake accumulators are pressurized, the priority valve is open, and the pilot shutoff valve is open. T2-3-21