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New Diesel Fuel Injector Nozzle 4326781 Injector Assembly for Cu-mmins Qsk45 Qsk60 Engine
| MOQ: | 1 pieces |
| Price: | US $320-370 / piece |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| OE No. | 4326781 |
| Type | Fuel Injector Pump |
| Car Make | Diesel Car |
| Packing | Neutral Packing or Customize Packing |
| Warranty | 1 Year |
| MOQ | 1PC |
This heavy-duty industrial electronic fuel injector (OE number: 4326781, common interchangeable numbers include 4326781PX, 4307525, etc.) is a high-precision fuel supply control unit specifically developed for high-power, high-load diesel power systems. This product is widely used in various large-displacement diesel engines and is perfectly compatible with large mining dump trucks, heavy-duty tracked bulldozers, large-tonnage excavators, and high-load land-based diesel generator sets.
Adhering to the development standards of "micron-level fine atomization and ultra-high pressure instantaneous response," the internal needle valve assembly and valve core are machined with ultra-precision geometric matching, and the surface is covered with a high-density anti-coking hardened coating, which can easily cope with particulate corrosion caused by varying diesel quality. After replacing with this new injector, the equipment's operation and performance will be immediately improved: crisp and clean ignition at startup, and severe vibration and engine shaking at idle will be completely eliminated. Facing conditions of fully loaded steep inclines or high-intensity continuous tunneling, the accelerator pedal and control lever respond smoothly and precisely, delivering a continuous and stable power output, effectively reducing exhaust black smoke and resulting in excellent overall fuel economy control.
Addressing the challenges of traditional procurement channels with multiple layers of intermediaries, high final prices, and cumbersome after-sales technical communication, we leverage our own modern factory to conduct independent direct sales. This streamlined supply model eliminates all middlemen's markups, directly reducing daily wear and tear parts expenses for fleets and repair shops, making long-term equipment operation and maintenance more cost-effective.
Commercial vehicles and construction machinery are high-attendance revenue assets. If they become paralyzed and break down due to fuel system depressurization failures, it will result in costly downtime losses and default risks every day. To address this, we have established a dedicated warehouse for this popular, best-selling model. Once an order is confirmed, it can be packaged and shipped within 24-48 hours, ensuring your equipment quickly returns to the work site thanks to our rapid logistics response.
Addressing the common quality issues with low-quality parts on the market, such as solenoid valve delays, internal pressure leaks, and needle valve jamming, every injector undergoes a fully automated testing bench before leaving the factory. Under 100% simulated high-temperature and ultra-high-pressure real-world operating conditions, we conduct multi-point verification of starting fuel volume, full-load discharge, and return fuel airtightness, ensuring that every product delivered to you possesses superior durability and consistent quality.
To address the challenge of early wear on components caused by differences in diesel lubricity and sulfur content in different regions, the core valve assembly is made of high-strength special alloy steel, combined with a surface ultra-wear-resistant hardening treatment process. It significantly enhances fatigue and corrosion resistance, maintaining stable performance even during prolonged operation under harsh conditions, effectively avoiding additional costs associated with secondary disassembly and maintenance.
| Parameter Name | Parameter Value |
|---|---|
| Product Name | Heavy-Duty Diesel Engine High-Pressure Electronic Injector |
| Standard OE Part Number | 4326781 |
| Interchange Number | 4326781PX / 4307525 |
| Fuel Supply System | Electronically Controlled High-Pressure Unit Injection/Common Rail 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 | Original factory-grade high-temperature resistant, anti-swelling special fluororubber (FKM O-Rings) |
| Net Weight per Unit | Approx. 1.30 kg / unit |
| Outer Packaging Specifications | Airtight rust-proof plastic seal bag + independent shockproof sponge padding + sturdy outer carton |
| Warranty Service Period | 12-month extended warranty commitment / 1-year factory technical support |
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 rises instantaneously, the 4326781 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 fuel injection control, ensures that the generator set speed remains stable at the standard level, and that the output voltage and frequency do not drift.
A: We promise that all products sold are 100% brand new, high-quality parts, and are definitely not recycled or refurbished parts. Because we ship directly from our own factory, eliminating the markups and rental costs of traditional physical stores and multiple layers of distributors, we can pass on the true factory price to you.
A: This model is a core stock item in our warehouse. After you complete payment, we can check, pack, and arrange for shipment within 24 to 48 hours. We cooperate with mainstream international express delivery channels, and it usually arrives at your door within 5-9 business days.
A: High-pressure fuel systems are extremely sensitive to impurities. Before installation, please thoroughly clean the diesel tank and fuel lines, and replace the fuel filter with a brand-new, high-specification one. Ensuring a clean fuel system is a prerequisite for maximizing the peak performance of the new component and guaranteeing its extended lifespan.
A: As long as the product has not been opened or tested, its appearance and accessories are intact, and it does not affect resale, we offer a 90-day return and exchange guarantee. In addition, the product has a 12-month warranty period. If a performance failure occurs within the warranty period due to non-human-caused reasons, our after-sales customer service team will arrange for a replacement or refund as soon as possible.
