Hitachi excavator rotary motor valve 4644566 rotary control valve

4644566 is a swing motor valve specifically designed for Hitachi excavator swing motors, installed on the swing motor to control the hydraulic flow and pressure of the swing system, achieving smooth and precise swing movements. Common Symptoms of Malfunctions: 1. Weak rotation and significantly slower speed. 2. Impact, shaking or instability during rotation. 3. Unable to stop rotation or poor braking effect. 4. Abnormal pressure in the rotation system. 5. Occurrence of rotation related fault codes. 6. Severe rotation failure. The rotation motor valve is a key control component of the rotation system, and damage can directly affect the flexibility and safety of the rotation operation. It is recommended to replace it in a timely manner.