3406604 3411821 Fuel Injector Diesel Engine Parts for Cu-mmins M11 Kta19 Kta38 Kta50 Qsk50

<Product Description> This high-precision heavy-duty diesel injection control assembly (standard part number: 3411821, common interchangeable part numbers include 3411821PX, 3013892, 3027588, etc.) is specifically designed for large-displacement, high-load diesel power systems. It is the core actuator for achieving high-pressure fuel particle atomization and microsecond-level precision control. This product is widely used in large-tonnage transport trucks in open-pit mines, large tracked excavators, heavy bulldozers, and high-load land-based emergency diesel generator sets.

Adhering to the design philosophy of "high-pressure micron-level atomization and millisecond-level rapid response," the core needle valve assembly and armature valve core are both manufactured using ultra-high precision grinding and polishing processes. The surface is covered with a high-density, anti-coking hardened coating, effectively handling the particle abrasion caused by complex diesel fuel qualities. After the equipment is upgraded, operators will experience immediate improvements in operation: ignition starts crisply and cleanly, and the severe vibrations at low idle speeds are completely eliminated; under heavy-load tunneling or full-load climbing conditions, the control lever and accelerator pedal provide smooth and consistent feedback, resulting in stable and continuous power output, while significantly reducing exhaust black smoke and providing excellent overall fuel economy control.

**Product Description:**

**Product Advantages:**
Standardized Self-Built Production Base with Precision Manufacturing:** Addressing the issues of dimensional deviations and batch performance inconsistencies that can easily arise from outsourcing, we rely on our standardized self-built production base for precision manufacturing throughout the entire process. From the micron-level grinding of the needle valve assembly to automated assembly, we control the entire process, completely resolving the risks of uneven fuel supply and high-pressure leakage, ensuring consistent fuel injection in each cylinder, and providing stable and reliable power for long-term equipment operation.

**100% Full-Condition Bench Testing with Rigorous Quality Inspection:** To address the risks of performance instability, knocking, and even cylinder scoring caused by the misinstallation of low-quality parts, each injector undergoes full-condition testing on a fully automated bench before leaving the factory. Precise calibration of fuel injection volume and return oil sealing under different pressure ranges ensures immediate usability upon installation, significantly saving time and labor costs associated with equipment disassembly, assembly, and debugging.

Massive, readily available stock and efficient warehousing and distribution: Addressing the significant downtime losses caused by downtime for construction machinery and commercial trucks due to material shortages, our warehousing centers maintain ample stock of best-selling specifications year-round. We respond quickly to order confirmations and prioritize packing and shipping within 24-48 hours, greatly shortening logistics cycles and helping fleets and owners quickly restore equipment availability, effectively mitigating downtime losses.

Special hardened, wear-resistant, and corrosion-resistant materials: Addressing the issue of premature wear and seizure of valve components caused by differences in diesel lubricity and sulfur content in different regions, core valve components utilize high-strength special bearing steel and a surface anti-corrosion hardening treatment, significantly improving fatigue resistance and wear resistance. This ensures stable performance even under harsh environments and prolonged high-load operation, avoiding the additional costs associated with frequent disassembly and repairs.

</Product Advantages>

<Parameter Table>

| Parameter Name | Parameter Value |

| --- | --- |

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

| Standard OE Part Number | 3411821 |

| Interchange Number | 3411821PX / 3013892 / 3027588 |

| Fuel Supply System | High-Pressure Electronic/Unit Injection System |

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

| Needle Valve Coating Process | High-density, ultra-wear-resistant DLC hardened coating |

| Nozzle Machining Technology | EDM high-precision electrical discharge micro-hole machining |

| Operating Temperature Range | -40°C to +125°C |

| Internal Sealing Components | High-temperature resistant, swelling-resistant special fluororubber (FKM O-Rings) |

| Net Weight per Unit | Approx. 1.28 kg / Support |

| Testing Standards | 100% Automated Bench Flow and Pressure Testing |

| Warranty Service Period | 12-Month Extended Warranty / 1-Year Factory Technical Support |

| </Parameter Table> | |

<Application Scenarios> Open-pit mining and continuous loading of large-tonnage rocks: In the dusty and harsh working environment of open-pit mines, heavy equipment is at full power, grabbing and loading heavy loads onto hard rock strata. As hydraulic resistance surges instantaneously, the 3411821 injector, with its microsecond-level electronic control response, establishes excellent atomization pressure, ensuring that the engine can still output continuous high torque even when facing drastic fluctuations in speed. The complex actions are smooth and continuous, completely avoiding engine stalling and misfires.

High-load all-weather power supply and infrastructure emergency support: In remote infrastructure construction sites or large mining areas lacking stable power grids, large generator sets driven by large-displacement diesel engines serve as the core power source, operating continuously for dozens of hours without interruption. With the frequent switching on and off of large-scale special electrical equipment on construction sites, the electrical load changes rapidly. The fuel injector, relying on extremely high consistency and rapid injection control, ensures that the generator set speed remains stable at the standard range, and that the output voltage and frequency do not drift.

**Application Scenarios**

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

A: Each fuel 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 arranged for production line scheduling.

Q: How do you guarantee the quality and performance of the product before it leaves 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 of superior quality from the outset.

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

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.