295050‑1170 Common Rail Diesel Injector — Precision Fuel Delivery For Heavy‑Duty Engines

The 295050-1170 diesel injector, carrying the OEM reference 23670-E0031, stands as a vital aftermarket replacement component for Hino heavy-duty platforms. Engineered to meet the rigorous demands of modern common rail fuel injection systems, this solenoid-driven assembly ensures precise fuel atomization and consistent delivery. For diesel repair facilities and parts distributors, this unit offers a reliable solution for restoring engine efficiency in commercial fleets, effectively addressing the common symptoms of power loss and excessive smoke associated with worn injectors.

This injector is built to match the original equipment standards for the Hino J08E and related engine families, featuring a high-pressure solenoid valve design that operates within the G3 common rail system. The internal nozzle structure utilizes precision micro-hole drilling technology to optimize the fuel spray pattern, ensuring complete combustion and reduced emissions. It is calibrated to handle operational pressures typical of modern diesel fuel systems, providing a stable injection curve that meets stringent Euro emission standards while maintaining the durability required for continuous heavy-load operation .

Designed specifically for the Japanese commercial vehicle sector, the 295050-1170 injector is a direct fit for the Hino J08E engine, a workhorse powerplant found in the Hino 500 Series and Ranger truck models. Its compatibility extends to the N04C engine variant, making it a versatile stock item for fleets operating Toyota Coaster buses and Toyota Dyna trucks. Additionally, this part is frequently sourced for industrial applications involving Mitsubishi construction machinery equipped with the 6M60T powerplant, ensuring broad market coverage for distributors catering to mixed commercial fleets .

Successful installation of the 295050-1170 requires strict adherence to workshop hygiene standards, as microscopic contaminants can severely damage the injector's internal plunger and control valve. Technicians must verify the cleanliness of the fuel tank and replace the fuel filter to prevent the recirculation of abrasive particles. It is critical to utilize new copper gaskets and O-rings during mounting to guarantee a proper seal against compression leakage. Furthermore, the injector clamp and high-pressure fuel line should be tightened to the exact torque specifications outlined in the Hino service manual to avoid deformation of the injector body or fuel leakage .

Incorporating the 295050-1170 into a repair strategy offers significant economic advantages over replacing the entire common rail system or sourcing main dealer parts. By addressing wear in the control valve and nozzle assembly, this replacement injector restores the precise fuel metering capabilities required to eliminate rough idling and white smoke. For diesel workshops, stocking this high-turnover item reduces vehicle downtime for fleet operators, while the robust construction ensures a service life comparable to original equipment. This balance of cost-efficiency and reliability makes it a staple for maintaining the performance of Hino diesel engines in demanding logistical environments .

Q1: Can this injector be installed without programming the ECU?
A: While the 295050-1170 is manufactured to standard flow codes, most modern Hino ECUs utilize correction codes for cylinder balance. For optimal performance, the new injector's code should be programmed using a diagnostic tool to prevent rough idling.

Q2: What are the common signs of failure for this specific part number?
A: Look for excessive black smoke under acceleration, a distinct "knocking" noise from the cylinder head, and increased fuel consumption. These symptoms often indicate internal leakage or a clogged nozzle .

Q3: Is this unit compatible with biodiesel blends?
A: The 295050-1170 is designed for standard diesel fuels. While it can handle minor biodiesel blends, high concentrations may accelerate wear on the solenoid valve components and internal seals over time.

Q4: What is the recommended replacement interval for these injectors?
A: There is no fixed interval; replacement depends on fuel quality. However, many fleets inspect or replace them between 150,000 to 200,000 kilometers to prevent fuel system contamination.

Q5: How should I store spare injectors to maintain warranty validity?
A: Keep the injectors in their original packaging, away from moisture and extreme temperature fluctuations. The anti-rust oil applied at the factory must remain intact until installation .

Q6: Does this injector require a specific fuel filter micron rating?
A: Yes, to protect the precision internals of the 295050-1170, a fuel filter with a filtration efficiency of 2-5 microns is strongly recommended to trap abrasive particles.