COMPONENT OPERATION / Signal Control Valve Control Valve Side Port Name Connecting to Remark Port 1 Control Valve Boom Raise Pilot Pressure Port 2 Control Valve Boom Lower Pilot Pressure Port 3 Control Valve Arm Roll-Out Pilot Pressure Port 4 Control Valve Arm Roll-In Pilot Pressure Port 5 Control Valve Left Swing Pilot Pressure Port 6 Control Valve Right Swing Pilot Pressure Port 7 Control Valve Bucket Roll-In Pilot Pressure Port 8 Control Valve Bucket Roll-Out Pilot Pressure Port 9 Control Valve Left Travel Forward Pilot Pressure Port 10 Control Valve Left Travel Reverse Pilot Pressure Port 11 Control Valve Right Travel Forward Pilot Pressure Port 12 Control Valve Right Travel Reverse Pilot Pressure Port 13 Control Valve Auxiliary Open Pilot Pressure Port 14 Control Valve Auxiliary Close Pilot Pressure Port S3 - Pressure Sensor (Swing) Port SE - Plug Port SM Hydraulic Oil Tank Returning to Hydraulic Oil Tank Port SN - Plug Port SP Hydraulic Oil Tank Returning to Hydraulic Oil Tank Port SL Control Valve Flow Combiner Valve Control Pressure Port SK Control Valve Arm Flow Rate Control Valve Control Pressure Port TR - Plug T3-6-4