Hitachi excavator water temperature sensor 8-98156648-0 engine temperature sensor

8-98156648-0 is a Hitachi excavator specific water temperature sensor (coolant temperature sensor), mainly used to monitor the engine coolant temperature and feedback the signal to the ECU, participating in fan control, fuel injection correction, and overheating protection. Common Symptoms of Malfunctions: 1. Abnormal Display of Water Temperature Gauge (High, Low, or Not Displayed) 2. Engine Overheating Alarm or Fan Constant/Not Running 3. Difficulty Starting, Unstable Idle, or Decreased Power 4. Water Temperature Related Fault Codes on the Instrument 5. Increased Fuel Consumption or Abnormal Emissions This sensor responds sensitively, is resistant to high temperatures and corrosion, and is an important monitoring component of the engine cooling system. It is recommended to replace it in a timely manner after damage to ensure accurate and reliable temperature control.