Hydraulic Main Control Valve 323-7680 323-7681 for E349D E349D2 345D Excavator

This hydraulic main control valve, with part numbers 323-7680 and 323-7681, is the core hydraulic distribution component specially designed for the hydraulic systems of E349D, E349D2, and 345D excavators. It independently distributes high-pressure hydraulic oil to the boom, arm, bucket, travel, and swing circuits, controlling the action sequence and flow rate of each working device. Featuring a precision spool valve structure, stable pressure regulation, and an anti-wear valve core, it offers direct replacement installation and excellent performance for mining and heavy construction sites.

• Spool wear, internal oil leakage, and weak working action
• Pressure relief valve failure, resulting in insufficient system pressure
• Solenoid valve malfunction, causing slow response or no action
• Seal damage, leading to external hydraulic oil leakage
• Valve body oil passage blockage caused by contaminated hydraulic oil

1. Confirm the part number and machine serial number before ordering
2. Check oil port layout, solenoid specification, and control logic
3. Request pressure test and action inspection before shipment
4. Use wooden anti-collision packaging to avoid valve core deformation
5. Quality warranty for manufacturing defects