COMPONENT OPERATION / Pump Device Pump Control Pressure Pi1 To Hydraulic Oil Tank Pilot Primary Pressure Pg Pump Control Pressure Pi2 3 2 4 1 Pump Torque Control Pressure ST Self Delivery Pressure Pd1 13 10 11 T4GB-03-01-008 Pump Control Pressure Pi1 To Hydraulic Oil Tank Pilot Primary Pressure Pg 3 2 4 1 Pump Control Pressure Pi2 Pump Torque Control Pressure ST Self Delivery Pressure Pd1 13 10 11 T4GB-03-01-009 T3-1-9 12 12