4372620 Original Excavator Fuel Tank Float for ZX200

Part number 4372620 is a Hitachi original fuel tank float sensor, which is a core component for fuel system oil level monitoring. According to Hitachi's official parts catalog, this part number clearly corresponds to the fuel tank float (sensor). It is mainly suitable for multiple hydraulic excavators in the Hitachi ZX series, and public information shows that it has been applied in models such as ZX450H/ZX450H BE. Due to differences in fuel tank structure, installation interface, and electrical parameters among different models of excavators, to ensure accurate matching, it is necessary to provide the complete model, serial number, and clear photos of the old sensors of the excavator before replacement.
 

The fuel tank float is a precision sensing device that monitors the fuel level in real-time and accurately. Its core function is to use the principle of buoyancy to make the float float up and down with the height of the oil level, driving the contacts of the internal sliding rheostat to move, thereby changing the output resistance value, converting the oil level change into a continuous electrical signal transmitted to the dashboard in the cab, and achieving visual display of the oil level. As an original part, it is precisely assembled with foam plastic buoy with excellent oil resistance, high-strength metal connecting rod and high-precision variable resistor. The product has excellent resistance to fuel corrosion, vibration and impact, and long-term stability. It can provide stable and reliable oil level signals under complex working conditions and temperature changes of excavators (working voltage is usually 12-24V DC), which is a key guarantee to prevent accidental shutdown of equipment caused by fuel depletion.

The maintenance core of this fuel float lies in regularly checking its mechanical smoothness, electrical connection reliability, and keeping the interior of the fuel tank clean. It is recommended to check every 500 working hours, with a focus on opening the fuel tank cap and manually adjusting the float to confirm whether its up and down movement is flexible and not stuck, and to check whether there is excessive sludge accumulation on the inner wall of the fuel tank. Electrical testing: When the oil gauge displays an abnormality, a multimeter can be used to measure the resistance value of the sensor plug. The normal range is usually between 850-1200 Ω, and the resistance value should change steadily with the float position.