8975390850 ISUZU Injection Pipe for 6WG1 Engine

Part number 8975390850 is the original high-pressure fuel injection pipe (high-pressure fuel pipe) specifically designed for Isuzu 6WG1 series large displacement diesel engines. Its common part number is often marked as 8-975339085-0 or 8975390851. This component is mainly suitable for Hitachi large and ultra large hydraulic excavators equipped with this 15.7-liter engine, including models such as ZX450-3, ZX470-3, ZX520, ZX650-3, ZX670, ZX730, ZX800, ZX850-3, etc.
 

This product is an Isuzu original high-pressure fuel injection pipe, which is the core component of the engine common rail fuel system that bears the highest pressure and delivers fuel to each cylinder injector. Its core function is to ensure precise fuel delivery without leakage or pressure loss at injection pressures of up to 1800-2000 bar, directly affecting the engine's power, economy, and emission levels. Oil pipes are usually made of multi-layer co extruded high-strength alloy steel pipes, with smooth inner walls to reduce flow resistance, and external anti-corrosion coatings and braided sheaths to withstand the continuous vibration, high temperature, and chemical corrosion of the engine compartment.
 

Installation and inspection: The replacement of high-pressure fuel injection pipes must be carried out after the engine is turned off and the fuel system is completely depressurized. Before installation, it is necessary to thoroughly clean the joints at both ends of the oil pipe, as well as the interfaces of the fuel injector and oil pump, to ensure that there are no impurities. Brand new original sealing gaskets or sealing cones must be used, and the connecting nuts must be tightened strictly according to the order and torque specified in the maintenance manual (using a torque wrench). Excessive or insufficient torque can cause leakage or damage to the joint. After installation, start the engine and carefully inspect all connections for fuel leaks.