COMPONENT OPERATION / Signal Control Valve PILOT PORT Pilot Valve Side Port Name Connecting to Remark Port A Right Pilot Valve Boom Raise Pilot Pressure Port B Right Pilot Valve Boom Lower Pilot Pressure Port C Left Pilot Valve Arm Roll-Out Pilot Pressure Port D Left Pilot Valve Arm Roll-In Pilot Pressure Port E Left Pilot Valve Left Swing Pilot Pressure Port F Left Pilot Valve Right Swing Pilot Pressure Port G Right Pilot Valve Bucket Roll-In Pilot Pressure Port H Right Pilot Valve Bucket Roll-Out Pilot Pressure Port I Travel Pilot Valve Left Travel Forward Pilot Pressure Port J Travel Pilot Valve Left Travel Reverse Pilot Pressure Port K Travel Pilot Valve Right Travel Forward Pilot Pressure Port L Travel Pilot Valve Right Travel Reverse Pilot Pressure Port M Auxiliary Pilot Valve Auxiliary Open Pilot Pressure Port N Auxiliary Pilot Valve Auxiliary Close Pilot Pressure Port SA - Plug Port SB - Plug Port PI Check Valve Primary Pilot Pressure Port PH Pilot Shut-Off Solenoid Valve Primary Pilot Pressure (Heat Circuit) Port SH Swing Parking Brake Brake Release Pressure Port DF Hydraulic Oil Tank Returning to Hydraulic Oil Tank T3-6-2