8980235810 Original Excavator Isuzu 4HK1 Engine Fuel Temperature Sensor

Part number 8980235810 (also commonly labeled as 8-98023581-0 or 179730-0100) is the official part number for the fuel temperature sensor of the Isuzu 4HK1 engine on Hitachi's original excavator. This component is one of the key input sensors of the engine electronic control management system (ECU), responsible for real-time and accurate monitoring of the diesel temperature at the fuel common rail or fuel filter, and converting the temperature signal into an electrical signal for feedback to the ECU. The ECU dynamically adjusts the fuel injection quantity, injection timing, and rail pressure control based on this signal, ensuring that the engine can achieve optimal combustion efficiency, reduce emissions, and protect high-pressure fuel system components at different ambient temperatures. As an original standard component, it is designed specifically for Hitachi medium-sized excavators equipped with Isuzu 4HK1 series electronically controlled high-pressure common rail diesel engines. The main compatible models include Hitachi ZX210-3, ZX240-3, and others.

This original fuel temperature sensor belongs to the Negative Temperature Coefficient (NTC) thermistor type temperature sensor. Its core function is to convert the temperature physical quantity of fuel into a resistance value (or voltage) signal that can be recognized by the ECU. As an original component, it usually adopts a stainless steel shell, and the internal core is a semiconductor ceramic thermistor element that is highly sensitive to temperature. Its resistance value decreases exponentially with increasing temperature. The sensor is installed on the fuel filter seat, common rail or low-pressure oil circuit through a precision threaded interface (usually PT1/8 or M12 × 1.5), and its temperature sensing head is directly immersed in the fuel to achieve fast and accurate temperature measurement. The typical working temperature range covers -40 ° C to+130 ° C, with high precision (usually within ± 2 ° C), fast response, and excellent long-term stability.

The maintenance core of this fuel temperature sensor lies in regularly checking its signal accuracy, electrical connection reliability, and preventing signal distortion caused by pollution or damage. Regular inspection and diagnosis: It is recommended to perform equipment maintenance every 500 working hours or every 6 months Before installing a new sensor, clean the installation threaded hole and apply a small amount of sealant or specified sealing gasket on the sensor thread. Tighten according to the specified torque to avoid excessive force damaging the housing. After installation, start the engine, check for fuel leaks, and use a diagnostic tool to confirm that the temperature signal has returned to normal. If the sensor fails, the ECU usually activates the default value and lights up the fault light, which may cause the engine to enter the speed limit mode and should be replaced in a timely manner.