Hitachi excavator hydraulic proportional solenoid valve 9258047 proportional solenoid valve assembly

The proportional solenoid valve is the control component of the excavator hydraulic pump. It linearly adjusts the hydraulic control pressure by receiving electrical signals from the computer board, thereby controlling the displacement of the main pump, matching load changes, and achieving fast and slow action adjustment. The aging, jamming, and coil damage of the solenoid valve can cause malfunctions such as weak operation, fluctuating speed, stalling, alarm, and speed loss.