SYSTEM / Control System Main Pump 2 Boom Cylinder Solenoid Valve Unit SC Boom Mode Selector Switch Pilot Pump Main Pump 1 Boom Overload Relief Control Valve CAN Com- munication Pressure Sensor Boom Raise Boom Lower Monitor Unit (Work Mode) Arm Roll-Out Arm Roll-In Bucket Roll-In Swing Travel (Right) Bucket Roll-Out Digging Mode Travel (Left) Attachment (Optional) T1J1-02-02-016 NOTE: The illustration shows during boom lower operation. T2-2-51