Part numbers 723-47-26102 723-47-26103 723-47-26104 723-47-26105 suitable for PC300-7 PC350-7 PC360-7 series excavators Hydraulic Main Control Valve Product Overview Part Numbers 723-47-26102, 723-47-26103, 723-47-26104, 723-47-26105 - Hydraulic Main Control Valve / Main Valve Assembly for PC300-7, PC350-7, PC360-7, and other -7 series excavators. Common Faults Insufficient swing torque, weak swing performance, difficult slewing under heavy load Unstable swing speed, jerky