Fuel Injector 3349860 for Cum-mins Engine Stc Kta19 Kta38 K50 Kta50

<Product Description> This heavy-duty diesel engine injector (OE No.: 3349860) is a precision fuel injection device tailored for large-displacement, high-intensity power systems. It is precisely matched to high-power diesel engines and widely applicable to heavy-duty trucks, heavy-duty engineering vehicles, mining dump machinery, and high-power industrial generator sets. Adhering to the design and manufacturing philosophy of "high pressure resistance and ultimate atomization," this product utilizes laser micro-hole processing technology to achieve ultra-fine fuel atomization flow distribution, ensuring complete combustion within the cylinder. When your heavy-duty machinery is equipped with this new injector and the ignition button is pressed, you will intuitively feel the crisp and clean engine start. Issues such as unstable engine speed, hesitant idling, and black smoke under overload caused by wear and tear on old parts will completely disappear. The powerful, linear, and lag-free power output provides your equipment with a highly reliable heavy-duty handling experience.

</Product Description>

• Large-scale physical factory, direct vertical supply. We directly eliminate the layers of markups from multiple distributors in cross-border trade, completely eradicating the technical barriers of high premiums and complex distribution channels that heavy-duty special parts often encounter in overseas retail markets. From internal valve core precision grinding to overall assembly, we achieve closed-loop control of the production line, providing global buyers with transparent and reasonable direct-from-the-factory prices, significantly reducing the long-term reorganization and maintenance costs of fleets.
• ****Routine saturated warehousing with readily available stock for rapid outbound delivery.** For this high-frequency consumable injector, which has a large presence in heavy transportation and special industrial power sectors, our modern warehouses maintain a consistently saturated inventory of finished products. This effectively mitigates the huge downtime losses caused by critical fuel system component failures that disrupt engineering projects or road freight fleets, forcing machinery to remain idle for extended periods, supporting 24/7 lightning-fast outbound delivery across borders.
• ****Digital closed-loop 100% fully automated pressure inspection.** Each injector undergoes rigorous screening on a dedicated high-pressure common rail fully automated testing bench before being sealed and packaged. Comprehensive closed-loop calibration is performed on its maximum opening rail pressure, multi-point dynamic injection volume, and return rate. This effectively eliminates the fatal hidden dangers of needle valve adhesion and high-pressure dripping in the cylinder leading to carbon buildup and cylinder scoring, common in low-end substitutes. This provides frontline mechanics with the peace of mind of successful installation on the first try, requiring no rework or fine-tuning.

• Heavy-Duty Highway Freight and All-Weather Mountain Climbing Transport: In cross-border logistics and on steep, undulating mountain roads, heavy trucks carrying tens of tons of cargo face extremely demanding horsepower tests. When drivers frequently change lanes and floor the accelerator, the 3349860 injector, with its microsecond-level fuel supply correction capability, precisely adjusts the injection pulse width instantaneously, ensuring complete fuel combustion and providing the engine with high torque at low speeds, guaranteeing efficient and timely long-haul freight transport.
• Large-Scale Infrastructure Projects and Harsh Mining Environment Operations: In dusty, harsh mining sites, large-tonnage construction machinery needs to perform high-load tunneling continuously every day. The injector's internal components undergo enhanced surface corrosion protection and nano-hardening treatment, enabling it to withstand the high fluid impacts of rough working environments, providing stable and continuous fuel supply, and effectively avoiding the huge collateral damage to the entire operation line caused by sudden breakdowns in remote areas.
• Commercial Vehicle Specialized Chain Repair Center Overhaul and Old Vehicle Refurbishment: When heavy-duty trucks or generator sets are brought in for major repairs due to long-term use of impure diesel fuel, resulting in severely worn injector valve cores, frequent heavy black smoke emissions, and extreme difficulty in cold starts, experienced mechanics directly select this brand-new injector, perfectly matching the original factory parameters. Because the physical interface and electrical wiring fit together seamlessly, ignition passes on the first try, and all pressure and return data perfectly meet standards.

Q: Is it a purely mechanical injector or an electronically controlled injector that requires a computer connection?

A: This product is a modern electronically controlled high-pressure fuel system injector. It has a dedicated precision electrical connector on top for connecting to the engine's ECU (Engine Control Unit). It is specifically designed for engines with electronically controlled high-pressure injection systems and is not suitable for older purely mechanical systems. Please confirm your engine model before purchasing.

Q: As an overseas independent website buyer, how fast is the factory shipping if I order multiple sets for fleet refurbishment? A: Due to the extremely large global market share of this series of engines in heavy-duty transportation and engineering power, this injector is a flagship best-selling component in our factory, and our warehouse maintains a consistently high inventory. Whether it's retail or large wholesale orders of dozens of units or more, we can complete the order fulfillment within 24-48 hours.

Q: What installation details should the mechanic be specifically instructed on when replacing this high-precision injector?

A: Before installing a brand new injector, please thoroughly clean the injector sleeve on the cylinder head to forcibly remove any residual hard carbon deposits and impurities. During installation, it is strictly forbidden for any fine dust to fall into the inlet, and brand new original factory specification sealing copper gaskets and O-rings must be used, tightened evenly according to the specified torque to prevent cylinder leakage.

Q: How well do your factory's products perform in terms of wear resistance when facing varying diesel quality?

A: In response to the inconsistent quality of diesel fuel in field environments or under certain special working conditions, our factory has applied a special nano-level hardening coating process to the internal needle valve assembly and control valve surface of this injector. Its wear resistance, oxidation resistance, and fluid shock resistance are significantly stronger than ordinary replacement parts, which can effectively extend the overall service life.