SYSTEM / Control System Pressure Sensor Pump 1 Delivery Pressure Sensor Pump 2 Delivery Pressure Sensor Counterweight Pump 1 Regulator Pressure Sensor Pump 2 Regulator Pressure Sensor Solenoid Valve Unit Pump 1 Control Solenoid Valve Pump 2 Control Solenoid Valve Pilot Pump T1J1-02-02-009 Main Relief Valve T2-2-37