Diesel Fuel Pump Assembly 0414755004 1379110 1392052 for Daf Engine Euro 3 Truck

This heavy-duty electronically controlled diesel unit pump/high-pressure fuel supply pump assembly (Part ID: 0414755004 / 0 414 755 004; common OE cross-references include 0414755001, 0414755002, 0414755003, 0986445001, 20450251, 20460158, etc.) is precision-engineered. Designed for the D12D/D12C series 12L heavy-duty diesel engine platform—widely used in FM12 and FH12 heavy-duty tractors, trucks, and industrial diesel generator sets—it serves as the core power unit for generating ultra-high injection pressure and delivering precise fuel quantities. Acting on millisecond-level electrical signals from the ECU, it efficiently pressurizes diesel fuel and delivers it uniformly to the injection system, ensuring a stable and continuous fuel supply across all operating conditions.

The pump body is constructed from high-strength forged alloy, while the core plunger and control valve spool undergo precision hardening and are treated with an ultra-hard, wear-resistant coating to effectively prevent impurity erosion and internal pressure loss. Upon installation, operators will notice a significant improvement in power delivery: cold starts are quick and smooth, and the engine runs steadily at idle with reduced noise. During heavy-load hill climbs or high-speed acceleration, throttle response is noticeably sharper and more powerful, helping to restore factory-standard driving dynamics and excellent fuel efficiency.

Smart manufacturing by the original source factory combined with end-to-end cost optimization. We provide a one-stop, high-standard parts supply solution that eliminates common points such as cumbersome procurement processes, excessive intermediary markups, and inconsistent quality tolerances. Precision manufacturing via standardized assembly lines ensures highly consistent oil supply pressure and flow rates across all cylinders, delivering reliable power output while keeping maintenance budgets under control.

Dynamic pressure testing across all operating conditions and rigorous quality inspections. To address issues such as oil pressure fluctuations, sluggish acceleration, and intermittent warning lights often caused by inconsistent component quality, every high-pressure pump undergoes automated bench testing simulating real-world high-temperature and high-pressure conditions. Precise testing of sealing integrity and fuel return volume across various pressure ranges ensures "plug-and-play" readiness, significantly reducing the time and cost associated with installation and adjustment.

Large-scale, consistent inventory and rapid shipping capabilities. To mitigate downtime losses and operational delays caused by fuel system failures in commercial vehicles and production equipment, our warehouse maintains ample stock of core specifications. Orders are rapidly processed and shipped within 24–48 hours, effectively shortening wait times and helping fleets and operators quickly resume service.

High-hardness, corrosion-resistant valve components with wear-resistant coatings. Designed to combat premature wear and valve spool sticking caused by poor diesel lubricity or high sulfur content in certain regions. Key internal wear components are crafted from premium special-alloy bearing steel and treated with specialized surface hardening; this ensures exceptional fatigue and wear resistance, maintaining stability under harsh environments and prolonged continuous operation, thereby significantly extending service life.

Heavy-duty Truck Long-haul Logistics and Trunk-line Transport: Heavy-duty tractor units equipped with 12L diesel engines frequently operate on trunk highways, often facing conditions such as starting under full load and sustained high-speed cruising. Maintenance personnel replace the unit with this high-pressure fuel supply pump when vehicles experience sluggish acceleration on steep inclines, delayed fuel pressure buildup, or increased fuel consumption. Following installation, fuel pressure builds up rapidly and steadily, and acceleration under heavy loads becomes robust and smooth, ensuring punctual and efficient long-haul transport. Large-scale construction and heavy-duty operations: Heavy engineering vehicles and specialized equipment operating at earthwork sites often face high-load and high-dust conditions. When equipment experiences slow starting, noticeable low-speed vibration, or stalling under heavy loads, the maintenance team can promptly install a high-spec, high-pressure fuel pump to restore the engine's powerful torque output, ensuring smooth performance despite frequent stop-start cycles and heavy-duty demands.

Q: Can the fuel pump be installed and used immediately upon receipt? Is recalibration required?

A: Every unit undergoes full-range pressure and flow testing and calibration before leaving the factory. Provided the fuel lines are clean, the pump can be put into immediate service after installation by a professional technician using standard torque specifications and proper air-purging procedures.

Q: What are the lead times and stock availability for bulk orders?

A: We operate our own manufacturing facilities and warehouses, maintaining a steady stock of this model. Standard orders ship within 24–48 hours of confirmation, while bulk orders can be quickly scheduled for production.

Q: What quality inspections does the product undergo before leaving the factory?

A: All products are assembled in a Class 100 cleanroom environment and undergo 100% dynamic bench testing at high temperatures and ultra-high pressures. We rigorously monitor pressure build-up, fuel return rates, and sealing performance to ensure the product meets quality standards for vehicle installation.

Q: What is the warranty period for the product?

A: We offer a 12-month warranty on this product. Should any malfunction occur due to non-human factors during the warranty period, we provide rapid after-sales technical support and service to protect your interests.