Diesel Fuel Injector 4001813 4087893 4088416 4088428 4326780 for Cu-mmins Qsk60 Diesel Engine

<Product Description> This high-pressure electronically controlled common rail nozzle unit (standard part code: 4326780, common interchangeable parts and OE identification codes include 4326780PX, 4326780RX, 0445120231, 5263308, etc.) is precision-manufactured for heavy-duty commercial transport vehicles, large-tonnage engineering equipment, and diesel power platforms (such as ISX15 and QSX15 series 15.0L six-cylinder diesel engines, matched with heavy-duty long-haul tractors, large mining dump trucks, and heavy-duty generator sets). As the micro-metering and spray execution unit of the high-pressure common rail fuel supply system, it is responsible for rapidly metering and dispersing diesel fuel into nano-sized ultra-fine atomized particles within milliseconds, promoting complete and uniform mixing of fuel and air, and releasing strong and stable power output.

The product adheres to the industrial design principles of "microscopic ultra-fine atomization and millisecond-level ultra-fast response." The internal needle valve assembly and armature control valve core are made from carefully selected quenched special alloy steel, combined with ultra-high precision geometric grinding and low-friction polishing processes. The surface is covered with a high-density, anti-coking hardened coating, effectively preventing early erosion caused by diesel impurities. After replacement and installation, equipment operators and on-site maintenance personnel will experience a very clear performance improvement: the engine starts crisply and cleanly, and the severe vibrations and jerks at low-speed idling are stabilized; under full-load tunneling, steep slope climbing, or high-intensity continuous operation conditions, the control lever and throttle are tight and smooth, acceleration is rapid and the explosive power is continuous, while significantly reducing black smoke emissions and providing excellent overall fuel economy control.

<Product Description>

<Product Advantages>
Advantages: Precision manufacturing throughout the entire process at a self-operated modern production base.

Problems Solved: Addresses issues such as dimensional discrepancies in component fit, uneven fuel supply to cylinders, and high-pressure leakage risks that are easily caused by traditional multi-layered OEM manufacturing and resale trade, while also avoiding the increased procurement costs associated with intermediaries.

Value Gained: Utilizing a self-built standardized production base for end-to-end precision manufacturing eliminates layers of intermediaries, ensuring consistent injection height across cylinders. This reduces maintenance costs and provides a robust and reliable power guarantee for long-term equipment operation.

Advantages: 100% fully simulated digital dynamic test bench for rigorous quality inspection.

Problems Solved: Addresses quality issues such as delayed solenoid valve response, internal pressure leakage, and needle valve jamming that are common with low-quality parts. These issues lead to unstable power output after installation and waste time and money on repeated disassembly and debugging.

Value Gained: Each injector undergoes fully automated testing before leaving the factory. Under fully simulated high-temperature and ultra-high-pressure conditions, the injection volume and return oil sealing performance across different pressure ranges are precisely calibrated, ensuring immediate usability after installation and significantly saving time and costs associated with equipment disassembly and debugging.

Advantages: Sustained, massive inventory and rapid warehousing and distribution.

Problems Solved: Addressing the costly delays and lost work time caused by fuel system malfunctions affecting commercial vehicles and construction machinery, resulting in downtime and material shortages.

Value Brought: The warehousing center maintains ample stock of best-selling specifications year-round. Orders are responded to quickly, with priority packing and dispatch within 24-48 hours, significantly shortening logistics and delivery cycles. This helps fleets and owners quickly restore equipment availability and effectively avoids downtime losses.

Advantages: Special hardened alloy wear-resistant and corrosion-resistant material.

Problems Solved: Addressing the issue of premature wear and valve core seizure caused by differences in diesel lubricity and sulfur content in different regions.

Value Brought: Core valve components utilize high-strength special bearing steel and surface anti-corrosion hardening treatment, significantly improving fatigue resistance and wear resistance. Even under harsh environments and prolonged high-load operation, stable performance is maintained, avoiding the additional costs of frequent disassembly and repairs.

</Product Advantages>

<Parameter Table>

| Parameter Name | Parameter Value |

| --- | --- |

| Product Name | Heavy-Duty Diesel Engine High-Pressure Electronic Common Rail Injector |

| Standard OE Part Number | 4326780 |

| Interchangeable Part Number | 4326780PX / 4326780RX / 0445120231 / 5263308 |

| Applicable Engine Platform | ISX15 / QSX15 Series 15.0L Diesel Engine |

| Fuel Supply System | High-Pressure Electronic Common Rail System |

| Core Needle Valve Material | Aerospace-grade hardened bearing steel, corrosion-resistant high-hardness special alloy steel |

| Surface Treatment Process | High-Density, Ultra-Wear-Resistant DLC Hardened Coating |

| Nozzle Machining Technology | EDM High-Precision Electrical Discharge Micro-Needling |

| Maximum Working Pressure | ≥ 2200 bar | | Operating Temperature Range | -40°C to +125°C |

| Internal Sealing Components | Original factory-grade high-temperature resistant and swelling-resistant special fluororubber (FKM O-Rings) |

| Net Weight per Unit | Approx. 1.05 kg / piece |

| Factory Testing Standards | 100% automated full-condition bench flow and sealing tests |

| </Parameter Table> | |

<Application Scenarios> Open-pit mining and large tracked excavator operations: Large excavators and mining loading equipment continuously excavate and load large rocks in harsh, high-dust, and high-intensity environments, placing extremely high demands on engine fuel supply stability and power output. When on-site operators notice a decrease in equipment digging force, significant and severe shaking at idle, or frequent black smoke from the exhaust pipe, maintenance personnel promptly replace worn parts and install this high-precision fuel injector. After replacement, fuel injection atomization is extremely uniform, and the hydraulic system power output is restored to ample and stable levels, ensuring efficient and uninterrupted mining operations.

Large-scale road construction and continuous operation scenarios for graders and bulldozers: When graders and bulldozers are engaged in highway infrastructure work, their engines need to maintain a stable low-speed, high-torque output for extended periods. When equipment experiences starting difficulties, sluggish acceleration, or abnormally high fuel consumption, the engineering mechanic team will replace the entire fuel supply system. Precise electronic injection control restores smooth engine operation, significantly improving fuel efficiency and acceleration response, avoiding additional labor costs caused by construction downtime.

**Application Scenarios**

Q: Can I use the product directly after installation? Is it necessary to enter a correction code?

A: Each injector has a unique flow correction code (IMA code) generated during factory testing. It is recommended to use a diagnostic tool to flash the correction code into the engine ECU after installation to achieve optimal fuel efficiency and smoothness.

Q: What is the inventory and delivery time for bulk purchases?

A: We have our own factory and large warehouse, and maintain a large inventory of this model year-round. Standard orders can be packaged and shipped within 24-48 hours, and large-volume orders can also be quickly scheduled for production line setup.

Q: How do you guarantee the quality and performance of your products before they leave the factory?

A: All injectors undergo assembly in a Class 100 cleanroom and 100% full-condition bench testing, covering key indicators such as sealing, pre-injection volume, full-load injection volume, and return oil volume. These stringent testing standards ensure that they are high-quality products from the outset.

Q: How long is the warranty period? What about after-sales service?

A: We offer a 12-month warranty period. If a performance failure occurs within the warranty period due to non-human factors, we provide rapid replacement or after-sales technical support to ensure your peace of mind when using our products.