Product Overview This hydraulic main control valve assembly is the core distribution component of the excavator hydraulic system, compatible with E320B and E330B models. It regulates the flow and pressure of hydraulic oil for the boom, arm, bucket, and travel functions. Manufactured to strict standards, it delivers stable performance and reliable sealing, making it well suited for equipment repair and replacement. Interchange Part Numbers 107-7010, 107-7071, 142-5521