Nozzle Diesel Engine Fuel Injector 4026222 4061851 3411756 3411754 for Cumm-ins

This industrial-grade heavy-duty diesel engine electronic control unit (ECU) injector (OE part number: 341-1756 / 3411756, common corresponding remanufacturing code: 20R-2281 / 20R2281) is a core actuator for precise fuel supply in high-pressure fuel systems. This product is widely compatible with many classic high-power heavy-duty hydraulic excavators, large-tonnage mining dump trucks, heavy-duty bulldozers, and large-scale emergency diesel generator sets in the field. This product deeply integrates next-generation ECU injection technology, with all internal moving parts achieving micron-level precision mechanical coordination, enabling it to easily handle harsh field operation conditions such as high dust, high humidity, and long operating cycles. When your core machinery is equipped with this precision injector, the overall machine operation will see an immediate improvement: the engine starts instantly from a cold start, and phenomena such as fluctuating idle speed and abnormal, violent vibrations caused by fuel supply failure or injector leaks are instantly eliminated, replaced by a crisp, regular, and extremely stable engine sound. When accelerating under heavy loads or digging deep pits, the horsepower output is extremely agile and smooth, and the previously glaring black smoke from the exhaust pipe disappears instantly, restoring the peak productivity of the mechanical power system.

Direct Sales from Our Own Factory for Excellent Cost-Effectiveness: Many overseas buyers often face the problem of inflated prices due to long multinational supply chains and multiple layers of intermediaries when procuring heavy-duty diesel engine parts. Leveraging our technologically advanced self-built modern manufacturing base, we offer a 100% factory-direct model, completely eliminating intermediary profit margins and providing end customers with highly competitive prices, helping machine owners significantly reduce expensive equipment maintenance and procurement budgets.

Large Inventory to Avoid Downtime Losses: If mining machinery is indefinitely stranded on-site due to fuel system component failure, it incurs extremely costly project delay expenses every day. We maintain a large, readily available inventory of finished products for our popular heavy-duty model 341-1756, enabling rapid order fulfillment and shipment within 24 to 48 hours. This exceptionally fast delivery ensures your core equipment is back up and running as quickly as possible.

Strict Digital Quality Inspection Guarantees Long-Term Durability: Some low-end parts on the market, due to insufficient hardness of moving parts, are prone to oil leaks and pressure drops after short periods of operation caused by wear from diesel fuel impurities. This can lead to failure to build up oil pressure when warm or stalling under high load. Every injector we manufacture undergoes multi-condition digital bench calibration on a full-function digital test bench, testing for flow regulation, pressure holding, and sealing. The control valve needle and core components have been upgraded with a diamond-like carbon (DLC) ultra-hard nano-coating process, structurally sealing off potential wear hazards and demonstrating exceptional long-term wear resistance and robust durability even in harsh fuel environments.

Heavy-duty transportation operations in open-pit mines and quarries: In the heart of open-pit mines with high dust levels and undulating terrain, mining dump trucks loaded with tens of tons of ore are struggling to advance towards the unloading site at higher elevations. Facing continuous and extremely steep winding mountain roads, the engine is under extreme load for extended periods. The 341-1756 injector receives instantaneous feedback from the electronic control unit, evenly injecting diesel fuel into the cylinder with perfect ultra-high pressure mist, ensuring sufficient torque at low speeds, maintaining speed while climbing hills, smoothly traversing high-load and dangerous sections, and preventing stalling on inclines.

Continuous Heavy-Duty Earthwork Excavation at Infrastructure Construction Sites: In urban infrastructure construction and road repair sites with extremely demanding schedules, heavy-duty tracked engineering machinery is continuously crushing and loading hard layers of gravel. Due to the constant, high-frequency, and dynamic changes in frontal resistance, a slow-responding fuel system can easily cause engine stalling. This injector, with its excellent hydraulic and airtightness and shock-resistant structure, can still provide precise and stable fuel delivery even under prolonged high-load vibration at full power output, assisting the equipment in rapid and powerful movements and ensuring the uninterrupted and steady progress of the project.

Q: How can I confirm that this injector is perfectly compatible with my diesel engine?

A: The matching requirements for high-pressure fuel system components are very strict. The most direct method is to check if the side of the old injector housing you replaced from your original vehicle has a laser-marked or stamped code containing "341-1756". If you are still unsure, you can send a photo of your engine serial number or vehicle nameplate to our customer service staff, and we will conduct a free technical verification using big data analysis.

Q: If I purchase this high-pressure injector from your independent website, do I need to send back the old, defective core charge?

A: Absolutely not. We operate on a pure factory-direct, net-price model. The injector you order is a brand-new, upgraded, high-quality product. You don't need to go through the hassle of sending back the old core charge, saving you expensive international shipping costs and transit time, making your parts procurement simpler and more transparent.

Q: How long is the warranty period after purchase? What should I do if a malfunction occurs during the warranty period?

A: We provide an official quality guarantee of up to 12 months (one year) from the date of receipt. During the warranty period, if the product operates in a clean and qualified diesel fuel environment but experiences any non-human-caused malfunction due to its own manufacturing quality, simply contact our after-sales team and provide a simple inspection description. We will provide you with free replacement parts or return support as soon as possible.

Q: What technical installation advice do you have for our mechanics when installing this brand new high-pressure unit injector?

A: Modern heavy-duty electronic fuel injection systems have extremely high requirements for fuel cleanliness. Micron-sized dust impurities or trace amounts of water in the fuel are strictly prohibited. Before installing the new injector, please ensure that your technicians thoroughly empty and clean the original vehicle's diesel fuel tank and low-pressure fuel lines, and replace the fuel filter with a brand new, high-specification one. During installation, a standard torque wrench must be used for tightening; do not blindly tighten it. It is recommended to have the trim code flashed into the ECU under the guidance of a professional technician.

Q: What is your current stock situation? Approximately how many days does it take for goods to arrive in our country after ordering from overseas?

A: As a factory-direct sales outlet, we maintain a large and sufficient stock of this model of injector in our central finished goods warehouse year-round. Within 24 to 48 hours of your payment, the goods will undergo multi-layered vacuum rust-proof and shock-proof packaging and be delivered to leading international express delivery companies such as DHL, FedEx, and UPS. Under normal circumstances, customers in major regions such as Europe, America, the Middle East, and Southeast Asia can successfully sign for their packages within 5-7 business days.