Hitachi excavator high-pressure oil pump 8-98091565-3 Isuzu 6HK1 common rail pump fuel injection pump 294050-0103

8-98091565-3 is a high-pressure common rail oil pump compatible with Hitachi excavators, suitable for Isuzu 6HK1 engines. The main function is to pressurize the fuel to high pressure and deliver it to the common rail system, providing stable high-pressure fuel for the injectors. Common Symptoms of Malfunctions: 1. Difficulty or inability to start the engine. 2. Weak acceleration and significant lack of power. 3. Engine shaking and black smoke. 4. Abnormal increase in fuel consumption. 5. Abnormal common rail pressure or related fault codes. 6. Unstable idle or sudden shutdown during operation. The high-pressure fuel pump is a core component of the fuel system, and damage can seriously affect engine power and reliability. It is recommended to replace it in a timely manner.