3677446 Fuel Injector Product Details
For Cummins QSK23 / QSK45 / QSK60 Series Diesel Engine | Direct Factory Supply | Full Cross-Reference Models in Stock
1. Product Overview
This model 3677446 fuel injector is a brand new aftermarket replacement part independently developed and manufactured by our factory. It is precisely compatible with Cummins QSK23, QSK45, QSK60 series large-displacement heavy-duty diesel engines, and can directly replace the original injector of the same specification.
This injector corresponds to multiple interchangeable cross-reference part numbers for the same QSK series engine application. All the part numbers listed on this page are fully compatible and interchangeable, and all corresponding injectors are produced and stocked by our factory, available for direct purchase.
Developed in strict accordance with original factory dimensions and performance standards, it effectively solves engine faults such as poor fuel atomization, power drop, increased fuel consumption and difficult starting under high-load working conditions. It is widely applicable for maintenance and replacement of mining machinery, industrial generator sets, marine power, heavy construction equipment and other supporting facilities.
2. Core Product Advantages
① OEM-spec Size, Direct Drop-in Replacement
The product dimensions and interface specifications fully match the original OEM parts. No modification to the fuel line or extra adjustment is required. It can directly replace damaged original injectors, greatly reducing maintenance downtime and installation costs for large equipment.
② Precision Calibration, Stable High-power Performance
Each injector undergoes high-precision flow calibration and high-pressure atomization testing before delivery. The fuel injection pressure, fuel delivery volume and atomization angle are consistent with original factory performance, ensuring full combustion of the large-displacement engine, stable power output, and effectively reducing fuel consumption and exhaust emissions under long-term high-load operation.
③ High-quality Materials, Durable for Heavy Duty Conditions
Core components are made of high-strength wear-resistant, high-temperature resistant and corrosion-resistant alloy materials. Seals are selected from high-end oil-resistant and pressure-resistant materials, which can adapt to the harsh and complex working environment of large heavy-duty diesel engines, and greatly extend the service life of the product.
④ 100% Inspection Before Delivery, Controllable Bulk Quality
Different from loosely assembled parts on the market, all injectors from our factory are inspected one by one to eliminate unqualified products. The quality consistency of bulk orders is highly reliable, suitable for long-term stable stocking by engineering machinery dealers, repair workshops and equipment maintenance service providers.
3. Our Factory Strength
We are a physical factory integrating R&D, production and sales of diesel engine fuel system components. We have been deeply engaged in fuel injection parts such as injectors and fuel injection pumps for many years, serving auto parts distributors, engineering machinery dealers, power equipment manufacturers and mining enterprises around the world.
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Full-chain In-house Production
We have independent machining workshops, clean assembly workshops and professional testing laboratories. The whole process from blank machining, component production to finished product assembly, calibration and testing is completed independently, with no intermediate trade links, bringing you more cost-effective procurement for heavy-duty engine parts.
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Professional Equipment & Technical Team
We are equipped with high-precision CNC machining equipment, high-pressure common rail fuel injection performance test benches, seal pressure testing equipment and other professional production and testing facilities. We have an experienced R&D team and quality control team, supporting product customization, parameter adjustment and OEM private labeling services for various large-displacement engine models.
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Stable Production Capacity & Full Model Stock
We keep regular stock of all mainstream cross-reference models for Cummins QSK series heavy-duty engines, supporting both small-batch sample orders and large-volume bulk purchase orders. Regular orders can be shipped within 72 hours after payment, and large project orders can be scheduled for production to guarantee delivery time as required.
4. Full-process Quality Control System
To ensure the reliability of every product, we have established a complete quality management process covering the entire product life cycle:
Incoming Material Inspection: Core components are sampled for material composition, size accuracy and hardness testing; unqualified raw materials are returned directly.
In-process Inspection: Key dimensions are sampled and inspected at each machining stage to ensure machining accuracy meets the tolerance requirements of high-pressure working conditions.
100% Finished Product Testing: After assembly, each injector undergoes seal test, high-pressure flow calibration, atomization effect test and pressure cycle test one by one. Only products with qualified performance can enter the next procedure.
Final Inspection Before Shipment: Before delivery, the product appearance, model number and accessory integrity are double-checked to avoid wrong delivery or missing parts.
5. Technical Specifications
| Item | Specification |
| Part Number | 3677446 (also referred as 367-7446) |
| Product Name | Diesel Engine Fuel Injector |
| Compatible Engine | Cummins QSK23, QSK45, QSK60 Series Heavy-duty Diesel Engine |
| Cross Reference Part Numbers | 3677446, 4001813, 4001830, 4002145, 4010025, 4010029, 4010158, 4010160, 4062090, 4062091, 4077076, 4077077, 4087886, 4087890, 4087892, 4087893, 4087894, 4088426, 4088428, 4088430, 4088431, 4326639, 4326779, 4326780, 4326781, 4902827, 4902828, 4921360, 4923349, 4928345, 4954801 |
| Product Type | Brand New Aftermarket OEM Replacement Part |
| Application | Mining machinery, industrial generator sets, marine power, heavy construction equipment and other large equipment maintenance & replacement |
All cross-reference part numbers above are fully interchangeable and available for purchase from our factory with ready stock.
6. Installation & Usage Notes
It is recommended that the installation be operated by professional engine maintenance technicians. Before installation, thoroughly clean the engine fuel line and high-pressure oil circuit to avoid impurities entering the injector and causing damage.
Tighten the fixed parts according to the original factory specified torque during installation to avoid thread damage or seal failure caused by excessive force.
After replacing the injector, it is recommended to match and adjust the engine injection parameters to ensure the best operating condition and power output of the engine.
Please use qualified diesel that meets the standards and replace the fuel filter regularly. Inferior fuel will greatly shorten the service life of the injector.
For engine overall overhaul, we recommend replacing the full set of fuel injectors at the same time to ensure consistent fuel injection volume of each cylinder and optimal engine performance.
7. Order & After-sales Support
Stock & Delivery: All listed cross-reference models are kept in stock, and orders will be shipped within 72 hours after payment; for large quantity project orders, the production schedule can be communicated in advance.
Warranty Service: For quality problems caused by non-human damage or improper installation, customers can enjoy corresponding warranty service. After-sales technical issues are directly handled by our factory engineer team for efficient resolution.
Customization Service: We support OEM private labeling, custom packaging and special parameter product development. If you need other Cummins heavy-duty engine injector part numbers not listed above, please contact us for quotation.
Sample Support: Small-batch sample orders are supported. You can confirm the product compatibility and quality before placing bulk orders, reducing procurement risks.
