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386-1766 Diesel Fuel Injector 386-17662 0r-12752 0r1275 for 3508b 3516b 3512b Series
| MOQ: | 1 pieces |
| Price: | US $289-309 / piece |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| OE No. | 386-1766 |
| Type | Fuel Injector |
| Car Make | Diesel Car |
| Packing | Neutral Packing or Customize Packing |
| Warranty | 1 Year |
| MOQ | 1PC |
This high-pressure electro-hydraulic unit injection assembly (standard part number: 386-1766, common interchangeable part numbers and OE reference numbers include 3861766, 10R-7225, 10R7225, 387-9431, 254-4339, etc.) is meticulously crafted for large and medium-sized construction machinery, mining equipment, and industrial-grade diesel power platforms (such as the C7 series 7.2L diesel engine, widely configured in 324D, 325D, 329D tracked excavators, 120K/140K graders, and wheel loaders). As a key control actuator of the HEUI electro-hydraulic unit injection system, it can accurately meter high-pressure diesel fuel and rapidly disperse it into nano-sized micro-atomized particles within a microsecond reaction time, achieving complete mixing and full combustion of fuel and intake airflow.
The product adheres to the industrial design principles of "high-pressure micro-atomization and millisecond-level ultra-fast response." Internal needle valve components and armature control valve cores are made from carefully selected quenched special alloy steel, combined with ultra-high precision geometric grinding and low-friction polishing. The surface is covered with a dense, anti-coking hardened coating, effectively preventing early erosion caused by diesel particulates. After the parts are installed and replaced, equipment operators and on-site maintenance personnel will experience a significant performance improvement: crisp and clean starts, with severe vibrations and jerks at low idle speeds becoming stable; under full-load tunneling or high-intensity continuous operation, the control lever and throttle are tight and smooth, acceleration is rapid and powerful, and black smoke emissions are significantly reduced, resulting in an excellent overall fuel economy experience.
Advantages: Direct shipping from our self-operated modern production base.
Problems Solved: Traditional OEM procurement models involve complex processes, easily leading to excessive tolerances in component fit, uneven fuel supply to cylinders, and high-pressure leaks, while significantly increasing procurement costs.
Value Gained: By relying on a self-built standardized production plant for precision manufacturing throughout the entire process, the layers of intermediaries are eliminated, 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 bench rigorous quality inspection.
Problems Solved: Low-quality parts are prone to issues such as delayed solenoid valve response, internal pressure leakage, and needle valve jamming, resulting in unstable power output after installation and wasted time and money on repeated disassembly and debugging.
Value Gained: Every 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 are precisely calibrated for different pressure ranges, ensuring immediate usability after installation and greatly 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.
| Parameter Name | Parameter Value |
|---|---|
| Product Name | Heavy-Duty Engineering Machinery Electro-Hydraulic Unit Injector (HEUI Injector) |
| Standard OE Part Number | 386-1766 |
| Interchangeable Part Numbers | 3861766 / 10R-7225 / 10R7225 / 387-9431 / 254-4339 |
| Applicable Engine Platform | C7 Series 7.2L Diesel Engine |
| Fuel Supply System | HEUI Electro-Hydraulic Unit Injection System |
| Core Needle Valve Material | Aerospace-grade quenched 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-hole machining |
| Operating Temperature Range | -40°C to +125°C |
| Internal Sealing Components | Original Equipment Manufacturer (OEM) High-Temperature Resistant and Swell-Resistant Special Fluororubber (FKM O-Rings) |
| Net Weight per Unit | Approx. 1.15 kg / piece |
| Testing Standards | 100% Automated Full-Condition Bench Flow and Sealing Tests |
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 vibration 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 consistent 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.
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.
