SYSTEM/Hydraulic System Lift Arm Pilot Valve Bucket Pilot Valve Spare Pilot Valve (Optional) 1 2 3 4 5 6 7 8 Pilot Shutoff Valve Control Valve Spare 2 To Service Brake Circuit 8 7 Service Brake Accumulators Spare 1 6 5 Priority Valve 2 Bucket 1 Slow-Return Valves Pilot Pump 4 Lift Arm 3 Main Pump PP T4GB-02-02-002 Charging Block NOTE: Numeral of each port of the pilot valves and the control valve shows the port to be connected. 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. T2-3-23