Diesel Common Rail Fuel Injector 0445120313 51101006154 for Man Diesel Engine

<Product Description>
This heavy-duty, electronically controlled high-pressure common-rail diesel fuel injector assembly (Part ID: 0445120313 / 0 445 120 313; common OE cross-references include 0986435532, 5254686, 2T2130201, etc.) is precision-engineered. It is primarily designed for ISB/QSB series 5.9L and 6.7L inline-six heavy-duty diesel engines, widely used in medium-to-heavy trucks, intercity buses, construction machinery, and generator sets. As the core actuator controlling diesel atomization quality and pulse injection timing within the fuel system, it is responsible for precisely metering high-pressure diesel and rapidly dispersing it into ultra-fine particles—facilitating thorough mixing with intake air for optimal combustion.

The component is designed and manufactured to standards emphasizing "micro-level precision fit" and "millisecond-level agile response." The core control valve spool and needle valve assembly are crafted from aerospace-grade, hardened special alloy steel, featuring ultra-high-precision geometric grinding and low-friction polishing. The surface is finished with a dense, ultra-hard coating that effectively prevents internal scratching and pressure loss caused by fuel impurities. Upon installation, drivers and technicians will notice immediate improvements: crisp, clean cold starts and quiet, vibration-free idling. Whether climbing steep slopes, navigating stop-and-go traffic, or cruising long distances, the throttle response is sharp and sensitive, delivering robust and smooth acceleration while reducing black smoke emissions—resulting in superior fuel efficiency and a smooth driving experience.
</Product Description>

<Product Advantages>
Standardized smart manufacturing and rigorous quality control directly from the source factory. Cost-effective sourcing by eliminating intermediary markups. By leveraging standardized production bases for end-to-end quality control and removing unnecessary middlemen, we ensure highly consistent injection pressure and flow rates across all cylinders. This approach not only cuts maintenance budgets but also provides reliable, robust power for vehicle and equipment operations.

Rigorous testing on ultra-high-pressure digital dynamic test benches. Low-quality replacements often suffer from response lag and pressure-release malfunctions—causing engine misfires and vibration—as well as wasted labor and costs due to repeated installation and adjustment. Every injection assembly undergoes automated testing before leaving the factory; flow rates and sealing integrity are precisely calibrated across various pressure ranges in simulated high-temperature, ultra-high-pressure environments. This ensures "ready-to-install" performance, drastically saving time and costs associated with installation and tuning.

Large-scale warehousing and rapid shipping response. Vehicles used for daily commuting and commercial transport are high-utilization assets; fuel system failures can lead to costly downtime and revenue loss. Our warehouse maintains ample stock, with orders packed and shipped within 24–48 hours of confirmation. This significantly reduces logistics wait times, helping fleets and owners quickly resume operations and avoid losses caused by vehicle downtime.

Special-quenched alloy needle valves with wear-resistant hardened coatings. In regions where diesel fuel has poor lubricity or high sulfur content—factors that often cause premature wear and valve sticking in precision components—we provide a superior solution. Our core components utilize high-hardness special bearing steel and anti-corrosion surface treatments. These enhancements offer exceptional fatigue and wear resistance, ensuring stable performance even under harsh conditions and prolonged high-load operation, thereby reducing the extra expenses associated with frequent repairs. </Product Advantages>

<Specifications Table>

</Specifications Table>

<Application Scenarios>
Heavy-duty truck intercity freight and long-haul logistics: Cargo trucks frequently operate on intercity routes, often maintaining full-load cruising and continuous hill-climbing states for extended periods. When drivers notice sluggish acceleration, insufficient power during high-gear climbs, or a significant increase in fuel consumption, maintenance personnel can promptly replace the set with these high-precision common rail injectors. Following installation, fuel injection pressure builds rapidly and stably, and heavy-load acceleration becomes robust and smooth, ensuring freight tasks are completed on time and efficiently. Construction Sites and Heavy Machinery Operations: Medium-to-heavy construction equipment and dump trucks operating on earthworks sites face challenges involving high dust levels and heavy loads. When equipment experiences sluggish starting, severe idling vibration, or stalling under heavy loads, maintenance teams can install this electronically controlled fuel injection assembly. Its precise fuel atomization allows the engine to instantly deliver high torque at low RPMs, ensuring smooth operation during frequent stop-start cycles and heavy-load tasks, thereby keeping the project on schedule.

Q: Can the product be used immediately after installation, or does it require a correction code?
A: Each fuel injector is assigned a unique flow correction code (IMA/QR code) during factory testing. We recommend using a diagnostic tool to input this code into the engine control unit (ECU) after installation to ensure optimal fuel efficiency and smooth operation.

Q: What are the stock levels and lead times for bulk orders?
A: We operate our own factory and large-scale warehouses, maintaining substantial year-round inventory for this model. Standard orders are typically packed and shipped within 24–48 hours, while bulk orders can be quickly scheduled for production.

Q: How are product quality and performance ensured before shipment?
A: All fuel injectors undergo assembly in a Class 100 cleanroom environment and 100% bench testing across all operating conditions. Tests cover critical parameters such as sealing integrity, pre-injection volume, full-load injection volume, and fuel return volume; our rigorous standards ensure that every unit shipped is of premium quality.

Q: What is the warranty period, and how is after-sales support handled?
A: We offer a 12-month warranty. Should a performance failure occur due to non-human factors within the warranty period, we provide rapid replacement or technical support to ensure a worry-free experience.