Diesel Fuel Injector 85023251 85023258 85030847 Common Rail Injector for V-olvo Fh5 D13K Truck Machinery Engine Parts

<Product Description>
This electronically controlled, intelligent unit-type high-pressure diesel injection assembly (specific ID code: 85023251; industry reference and cross-reference codes include 85023251-P, 7485023251, 85023247, 24111932, 22459521, 22717956, etc.) is a precision-engineered component. Designed primarily for the D13K series—a 12.8L, inline-six, heavy-duty diesel engine platform meeting Euro VI low-emission standards—it is widely used in long-haul heavy-duty container tractors, specialized construction dump trucks, heavy-load haulers, and high-reliability industrial backup diesel generator sets. As the core actuator within the heavy-duty commercial vehicle fuel supply system, it facilitates high-pressure, homogeneous atomization and microsecond-precision split injection. Through the synergy of overhead camshaft mechanical strokes and high-speed electromagnetic valve actuation, it rapidly pressurizes diesel fuel and disperses it into a fine, micron-scale mist, ensuring thorough mixing with intake air and complete combustion.

In terms of mechanical design and precision manufacturing, this component strictly adheres to standards requiring tight geometric tolerances, resistance to high-frequency reciprocating mechanical fatigue, and superior resilience against detonation-induced shock. Key internal components—including the micro-solenoid control valve, precision pressurizing plunger assembly, and multi-hole nozzle needle valve set—are crafted from aerospace-grade, vacuum-quenched special alloy steel. Their surfaces feature a high-density, ultra-hard, wear-resistant, and anti-corrosive coating that effectively blocks erosion from microscopic abrasive particles found in low-quality fuel, thereby eliminating the risks of scratching, seizing, or high-pressure internal leakage. Upon installation of the complete injection unit, operators and fleet technicians will experience a significant performance upgrade: the engine starts instantly from a cold state and runs smoothly at idle with minimal noise and no abnormal vibration. Whether starting under heavy loads, hauling up long gradients, or cruising at high speeds, the throttle response is crisp and robust; power delivery is seamless and immediate, black exhaust smoke is drastically reduced, and the system fully restores factory-standard high-torque output and excellent fuel efficiency.

<Product Advantages>

Precision manufacturing and direct supply control at our own standardized production facilities. We effectively lower end-user procurement costs by eliminating the issues often caused by multi-layer distribution—such as excessive dimensional tolerances, inconsistent fuel injection volumes across cylinders, and high-pressure sealing leaks. Leveraging CNC machining across all processes and strict quality control at our modern, self-owned facilities, we cut out unnecessary markups and ensure highly balanced injection pressure and volume across all cylinders. This reduces maintenance budgets while providing reliable, robust power for the stable operation of heavy-duty equipment.

Rigorous validation on ultra-high-pressure digital dynamic test benches. Low-quality replacement injectors often suffer from sluggish solenoid response and internal pressure-relief valve sticking, leading to severe engine shaking, misfires, and wasted labor costs from repeated disassembly and rework. Every assembled injection unit undergoes comprehensive testing on a fully automated digital test bench. We simulate extreme ultra-high-pressure and high-temperature conditions to verify pre-injection volume, full-load flow, and fuel-return sealing performance. This ensures the unit is ready for immediate installation, eliminating the time and cost associated with secondary adjustments.

Large-scale warehousing with ready stock and rapid shipping. We address the needs of high-turnover assets—such as highway tractors and heavy construction equipment—where downtime caused by fuel injection component failure results in significant financial losses due to operational stoppage. Our warehouse maintains ample safety stock year-round. Upon order verification, we rapidly complete final inspections and seal the components for shipment within 24–48 hours. This significantly shortens material turnaround and waiting times, helping fleets and end-users quickly resume operations and avoid losses associated with downtime.

We utilize specialized cryogenic-quenched alloy mating parts featuring hardened, wear-resistant coatings. These components are engineered to withstand harsh operating conditions—such as poor diesel lubricity and high sulfur content—that typically cause premature uneven wear or scoring on plunger assemblies. Internal moving parts are crafted from high-hardenability, wear-resistant bearing steel and treated with vacuum heat treatment and anti-corrosion, anti-galling, wear-resistant coatings. This combination significantly enhances mechanical fatigue life and erosion resistance, ensuring excellent performance even during prolonged, full-load operation and reducing the maintenance costs associated with frequent shutdowns and replacements. </Product Advantages>

<Specifications>

<Application Scenarios>
Long-haul, heavy-load, inter-regional trunk-line logistics: Container semi-trucks equipped with 12.8L Euro VI diesel engines operating continuously on long-distance highways, facing challenges such as significant day-night temperature fluctuations, sustained uphill climbs, and high-speed cruising under full load. When vehicles exhibit sluggish throttle response, stalling on inclines, or abnormally high average fuel consumption, the maintenance team replaces the entire set of electronically controlled unit injectors. Following installation, the ultra-high-pressure atomized spray distributes rapidly and evenly; power delivery during heavy-load starts and acceleration remains smooth and responsive to pedal input, ensuring timely, on-schedule cargo delivery.

In large-scale open-pit mining and heavy-duty material transport operations—where heavy dump trucks and large crawler excavators frequently operate in quarries and fill sites—equipment endures constant exposure to airborne dust, severe road vibrations, and sustained full-load engine operation. When the powertrain experiences delayed cold starts, fluctuating idle speeds, or stalling under heavy loads, maintenance personnel promptly install this high-specification injector assembly. The consistent, ultra-fine injection restores robust torque output, ensuring the efficient progress of material transport operations.

Q: Can the product be installed and used immediately upon receipt? What are the key precautions during installation?
A: All injectors undergo precise calibration on fully automated test benches before leaving the factory and are ready for immediate installation. Before assembly, ensure that the injector bore in the cylinder head and the fuel passages are thoroughly cleaned of carbon deposits and impurities. Replace the high-temperature-resistant sealing O-ring and the copper thermal-conductive gasket with new ones, tighten the hold-down mechanism to OEM torque specifications, and fully bleed air from the fuel system before starting the engine 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 base and professional warehousing center, maintaining ample stock of this key high-displacement model year-round. Standard bulk orders undergo quality inspection and are packed and shipped within 24–48 hours of confirmation; for large fleet bulk procurement plans, we can also rapidly schedule flexible production runs to meet delivery requirements.

Q: What tests does the product undergo before leaving the factory to ensure quality compliance? A: The assembly process takes place entirely within an ultra-clean workshop. Every finished unit undergoes dynamic testing on a fully automated digital test bench, comprehensively verifying cold-start pressure buildup speed, idle flow rate, consistency of maximum injection volume at full load, fuel return volume, and high-pressure sealing integrity. These rigorous testing standards ensure that every product leaving the factory is of premium quality.
Q: What is the warranty period for the product, and how are after-sales issues resolved?
A: We offer a 12-month warranty on this electronically controlled fuel injector. Should any performance anomalies arise during the warranty period—provided they are not caused by external physical damage or contamination from poor-quality fuel impurities—we provide rapid replacement and remote technical support from professional engineers to ensure your long-term, stable operation.