Hitachi excavator accessory 0976504 solenoid valve (pilot lock valve)

0976504 is a widely used Pilot Shutoff Solenoid Valve in the Hitachi ZX-3 series and subsequent models, also known as a Pilot Shutoff Solenoid Valve or Safety Lock Solenoid Valve. Main function: Control the on/off of the pilot hydraulic oil circuit to achieve the locking/unlocking function of the cab safety lock switch. When the driver leaves the seat or closes the safety lock switch, the pilot pressure is cut off to prevent the misoperation of the operating handle. After being powered on, the pilot oil circuit is opened to enable normal operation of the boom, forearm, bucket, rotation and other actions. Common fault manifestations: The safety lock switch is invalid, the operating handle cannot be locked or unlocked, and there is no response after starting. The pilot pressure cannot be established. The solenoid valve coil is burned, stuck or internally leaked. The monitor shows pilot related fault codes