Fuel Injection Unit Pump 0414755006 0414755007 for Ren-ault Truck

This high-pressure diesel fuel injection unit assembly is precision-engineered for heavy-duty commercial vehicles and construction machinery (Core Part No.: 0414755006 / 0 414 755 006; common cross-reference numbers include 0414755007, 0414755004, 0414755005, 02112957, 02113145, 2112957, 2113145, etc.). It is fully compatible with inline 4-cylinder and 6-cylinder heavy-duty turbocharged diesel engines and is widely installed in large crawler excavators, motor graders, high-pressure concrete pumps, large material handling equipment, specialized off-road engineering vehicles, and high-power emergency backup diesel generator sets. Serving as the core control terminal within the high-pressure fuel supply network—managing ultra-high pressure generation, ultra-fine droplet atomization, and microsecond-level precision metering—this unit operates through the coordinated control of mechanical cam-driven strokes and high-speed electromagnetic coil millisecond pulses. It is responsible for rapidly pressurizing diesel fuel and uniformly dispersing it into the combustion chamber, ensuring complete, homogeneous combustion of the air-fuel mixture under high compression ratios.

The assembly strictly adheres to industrial standards regarding microscopic precision tolerances, resistance to high-load reciprocating mechanical shock, and durability against high-pressure detonation fatigue. Internal precision components—including the plunger guide assembly, solenoid-driven valve core, and micro-orifice needle valve set—are crafted from aerospace-grade, vacuum-quenched special alloy mold steel. These parts undergo mirror-finish micro-lapping and are treated with a high-hardness, wear-resistant, and corrosion-resistant composite coating. This effectively prevents surface scoring caused by fine impurities in low-quality diesel, as well as premature needle valve wear and abnormal high-pressure internal leakage. After installing the complete valve body assembly, operators and fleet maintenance technicians can immediately perceive the restoration of mechanical performance: cold starts are crisp and decisive, while low-speed idling is smooth, steady, and free of vibration or noise. Under demanding conditions—such as heavy-load excavation, towing on steep inclines, and sustained rated-power operation—throttle response is robust and precise, high torque builds up seamlessly with rising RPM, and exhaust emissions return to a clean, clear state. This restores the entire powertrain to an optimal operating condition characterized by low fuel consumption and high equipment uptime.

Product Advantages

Standardized, precision smart manufacturing and direct-from-source supply control. We effectively reduce end-user procurement costs by eliminating the price markups associated with multi-layered distribution channels—markups that often mask issues such as inconsistent machining tolerances, high variance in multi-cylinder fuel injection volumes, and risks of high-pressure seal leakage. Leveraging high-precision CNC grinders at our modern production facility, we implement end-to-end processing and closed-loop tolerance control. By removing intermediary markups, we ensure highly linear consistency in pressure-building response curves and cyclic injection volumes across multiple cylinders; this not only cuts maintenance expenses but also provides a solid, reliable power foundation for heavy machinery operating under high loads.

Rigorous validation via all-condition, ultra-high-pressure digital dynamic test benches. Low-quality replacement parts often suffer from electromagnetic coil lag or internal pressure-relief valve sticking, leading to severe engine shuddering, misfires, and wasted labor costs from repeated disassembly and troubleshooting. Every injection assembly undergoes comprehensive testing on a fully automated digital test bench after assembly. We simulate extreme ultra-high-pressure and high-temperature load conditions to verify pre-injection volumes, full-load high-flow performance, and fuel-return seal integrity. This ensures the assembly is ready for immediate installation, eliminating the time and expense associated with rework and readjustment.

Modern warehousing with consistent stock availability and rapid shipping. We address the critical needs of specialized engineering dump trucks and heavy mining machinery—equipment that serves as a high-uptime productivity asset. We minimize the massive financial losses caused by equipment downtime resulting from fuel system component failure. Our warehousing center maintains ample safety stock year-round. Upon order verification, we rapidly complete final inspections and seal the goods for shipment within 24–48 hours. This significantly shortens material lead times, helping fleets and end-users quickly restore operational readiness and avoid financial losses caused by downtime.

We utilize specialized alloy components—subjected to vacuum cryogenic quenching—and hardened, wear-resistant coatings. These are engineered to withstand the harsh conditions often found in field operations, where poor diesel lubricity and high levels of fine abrasive impurities can otherwise cause premature erosion and wear on the contact surfaces of plungers and needle valves. Key load-bearing components are crafted from high-hardenability, wear-resistant special alloy tool steel. By combining deep vacuum quenching heat treatment with anti-wear, corrosion-resistant composite coating technologies, we significantly enhance mechanical fatigue life and erosion resistance. This ensures stable performance even during continuous, full-load operation in demanding environments, thereby reducing the additional maintenance costs associated with frequent downtime.

Open-pit mining and heavy-duty earth/rock excavation & transport: Heavy excavators and dump trucks equipped with this electronically controlled fuel injection assembly operate continuously at mining and quarry sites, enduring harsh conditions characterized by high airborne dust levels, intense vibration, and the high-frequency, high-load stresses of soil and rock excavation. When the powertrain exhibits issues such as sluggish cold starts, unstable idling, or sharp RPM drops under heavy digging loads, on-site maintenance personnel replace the unit with this high-precision injection assembly. The stable, robust high-pressure injection allows the engine to rapidly regain its rated torque, ensuring the efficient transport of engineering materials.

Large-scale road leveling, compaction, and continuous heavy-duty operations: Specialized maintenance machinery operates for extended periods in hot, arid conditions or during continuous high-load compaction tasks, keeping the engine running at full load and high RPM. When equipment shows signs of sluggish acceleration, slow response under load, or abnormally high fuel consumption during heavy-duty travel, maintenance teams install this high-spec injection assembly. Its superior, uniform atomization restores the engine's robust and stable power response, effectively safeguarding project schedules and construction quality.

Q: Can the new product be installed and used immediately upon receipt? What precautions should be taken during installation?

A: All injection assemblies undergo precise operational calibration on fully automated test benches before leaving the factory and are ready for immediate installation. Before installation, thoroughly clean the cylinder block sleeve bore and low-pressure fuel passages to remove sludge and carbon deposits; replace with new high-temperature resistant sealing rings; tighten mounting bolts strictly according to the torque specifications in the equipment maintenance manual; and bleed air from the fuel system before startup to ensure proper operation.

Q: How are shipping times and inventory availability guaranteed for bulk orders from fleets or repair shops?

A: We operate our own manufacturing facilities and a modern warehousing network, maintaining ample stock levels year-round for this core model used in construction machinery. Standard bulk orders undergo final inspection and are packaged for shipment within 24–48 hours of verification; for large-scale construction firms with standing bulk requirements, we can rapidly arrange customized production scheduling and delivery.

Q: What professional inspections do the products undergo before leaving the factory to ensure quality?

A: Assembly takes place in an ultra-clean workshop. Every finished unit must pass dynamic testing on a fully automated digital test bench, covering cold-start pressure build-up speed, idle flow rate, consistency of maximum injection volume at full load, fuel return volume, and high-pressure sealing integrity. These rigorous standards ensure that every product is of premium quality upon dispatch.

Q: What is the warranty period for the product, and how are after-sales inquiries handled?

A: We provide a 12-month warranty for this diesel injection valve. Should performance issues arise during the warranty period—provided they are not caused by external physical damage or contamination from poor-quality fuel impurities—we offer rapid replacement and remote technical support from professional engineers to ensure your long-term, stable operation.