0445110307 4941109 Common Rail Fuel Injector 6271-11-3100 for Komatsu PC70-8

Product Description

This electronically controlled high-pressure common-rail diesel fuel injector assembly (Part ID: 0445110307 / 0 445 110 307; common OE cross-references include 0986435196, 5258744, D5258744, etc.) is precision-engineered for the ISF 2.8L four-cylinder diesel engine platform. It is widely used in light trucks, intercity logistics vans, commercial passenger vehicles, and certain off-road SUVs. Serving as the core actuator for controlling diesel atomization quality and pulse injection timing within the fuel supply system, it is tasked with precisely metering high-pressure diesel and rapidly dispersing it into ultra-fine particles—in response to millisecond-level electrical signals—to facilitate thorough mixing and combustion with the intake airflow.

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 diesel impurities. Upon installation, drivers and mechanics 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, and acceleration is robust yet smooth. Additionally, black smoke emissions are reduced, resulting in satisfactory fuel efficiency and a stable, refined driving experience.

Product Advantages

Standardized smart manufacturing and quality control directly from the source factory. By eliminating issues often associated with intermediary distribution—such as excessive fit tolerances, uneven fuel delivery across cylinders, and risks of high-pressure leakage—this product offers a reliable solution while effectively reducing procurement costs. End-to-end quality control based on standardized production facilities eliminates unnecessary markups and ensures highly consistent fuel injection pressure and flow rates across cylinders; this reduces maintenance budgets while providing reliable, robust power for vehicle and equipment operations.

Rigorous testing on ultra-high-pressure digital dynamic test benches. To address issues common with low-quality replacements—such as response lag, pressure loss, or sticking that causes engine misfires and vibration, as well as the wasted time and expense of 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, ensuring "ready-to-install" performance and significantly saving on installation and adjustment time and costs.

Large-scale warehousing and rapid shipping response. Recognizing that daily commuter and commercial transport vehicles are high-utilization productivity tools—where fuel system failures can lead to costly downtime and revenue loss—our warehouse maintains ample stock year-round. Orders are packed and shipped within 24–48 hours of confirmation, significantly shortening logistics wait times and helping fleets and owners quickly resume operations to avoid losses associated with vehicle downtime.

Specialized quenched alloy needle valves and wear-resistant hardened coatings. Designed to combat issues where poor diesel lubricity or high sulfur content leads to premature component wear and valve sticking. Core components utilize high-hardness specialized bearing steel and anti-corrosion surface treatments, offering superior fatigue and wear resistance; this ensures stable performance even under harsh conditions and prolonged, high-load operation, thereby reducing the extra expenses associated with frequent repairs.

Specifications Table

Application Scenarios

Light trucks and inter-city express delivery operations: Light pickup trucks and vans frequently travel between cities and within urban areas, often facing conditions involving full-load starts and stop-and-go traffic. Maintenance technicians replace the injector when drivers experience sluggish acceleration, a lack of power on inclines, or a noticeable increase in fuel consumption. After installation, fuel delivery is smooth, acceleration is responsive and precise, and fuel economy is improved. High-frequency operation scenarios for business shuttles and commuter buses: These vehicles transport passengers over long distances daily, demanding quiet idling and smooth engine operation. When issues such as sluggish cold starts, severe idling vibration, or excessive exhaust emissions arise, maintenance teams promptly install a complete set of electronically controlled fuel injection components. Precise fuel atomization restores smooth engine operation, ensuring a comfortable and punctual journey.

Q&A

Q: Can the product be used immediately after installation, or is a correction code required?
A: Each fuel injector is assigned a unique flow correction code (IMA/QR code) during factory testing. We recommend using a diagnostic tool to program this code into the engine control unit (ECU) after installation to achieve 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 metrics 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 performance issues arise due to non-human factors during the warranty period, we provide rapid replacement or technical support to ensure a worry-free experience.