3347907 Fuel Actuator Electronic Control Actuator for Cu-mmins Qsk60 Qsk45 Qsk23

This heavy-duty diesel engine electronic fuel actuator/fuel control valve assembly (Part ID: 3347907; common OE cross-references include 3347905, 3347907RX, 3070505, 4024808, etc.) is precision-engineered for the M11, ISM11, QSM11, and N14 series (10.8L and 14.0L) heavy-duty diesel engine platforms. It is widely used in heavy-duty semi-trucks, mining dump trucks, large marine propulsion systems, and industrial generator sets. As a core electromagnetic component within the electronically controlled fuel system, it receives pulse commands from the ECU to precisely control fuel flow and circulation volume. It is responsible for the millisecond-level fine-tuning of fuel supply pressure and metering, directly determining the fuel delivery accuracy of the injection system.

The actuator features a high-sensitivity electromagnetic coil and a high-hardness, wear-resistant valve spool. Its surface is treated with a corrosion-resistant coating and high-temperature seals, effectively preventing internal sticking caused by extreme temperature fluctuations or diesel impurities. Upon installation, operators and technicians will notice significant improvements: rapid and crisp cold starts, smooth and stable idling, and a marked reduction in fuel pump noise. During heavy-load climbing or continuous high-load operations, throttle response is robust and sensitive, minimizing acceleration lag and engine surging, thereby delivering precise fuel control and a smooth operating experience.

Manufactured and quality-controlled at the source factory. By eliminating intermediary layers—which often lead to issues like excessive fitment tolerances, electromagnetic response delays, and high-pressure leakage risks—we effectively reduce procurement costs. Our standardized production base ensures end-to-end quality control and removes unnecessary markups, guaranteeing consistent valve spool travel and flow rates. This approach not only cuts maintenance budgets but also provides reliable, robust power performance for vehicles and equipment.

Rigorous testing on ultra-high-pressure digital dynamic test benches. This process addresses common issues associated with low-quality replacements—such as sluggish response, valve spool sticking (causing idle speed instability), and the wasted labor and costs involved in repeated removal, installation, and adjustment. Every actuator assembly undergoes automated testing before leaving the factory; response speeds and sealing integrity are precisely calibrated across various voltage and pressure ranges within a simulated real-world high-temperature, high-pressure environment. This ensures "plug-and-play" readiness, drastically saving time and costs associated with installation and setup.

Large-scale warehousing with readily available stock and rapid shipping. Commercial transport vehicles and heavy equipment are high-utilization productivity assets; downtime caused by fuel control component failures leads to costly delays and financial losses. Our warehouse maintains ample inventory year-round. Orders are quickly processed and shipped within 24–48 hours, significantly reducing logistics wait times and helping fleets and owners get back to work quickly to avoid downtime losses.

High-hardness, corrosion-resistant valve spools and high-temperature-resistant fluororubber seals. These components are designed to combat issues such as premature wear of mating parts and seal degradation caused by low-lubricity diesel or high sulfur content found in certain regions. Key internal wear components are crafted from high-hardness special alloy steel with specialized surface hardening treatments. Paired with high-temperature-resistant fluororubber seals, the assembly offers superior fatigue and wear resistance, maintaining stable performance even under harsh conditions and prolonged high-load operation, thereby reducing the extra expenses associated with frequent repairs.

| Parameter Name | Parameter Value |

| --- | --- |

| Product Name | Electronic Fuel Actuator / Fuel Quantity Control Valve for Heavy-Duty Diesel Engines |

| Standard OE Part Number | 3347907 |

| Cross-Reference Numbers | 3347905 / 3347907RX / 3070505 / 4024808 |

| Compatible Engine Platforms | M11 / ISM11 / QSM11 / N14 Series Diesel Engines |

| Control System Type | ECU-driven pulsed solenoid valve (Fuel Actuator Valve) |

| Valve Spool Material | Aerospace-grade quenched special alloy steel |

| Surface Treatment | High-density, anti-corrosion, ultra-hard coating |

| Rated Operating Voltage | 12V / 24V (Dynamic response) |

| Operating Temperature Range | -40°C to +125°C |

| Internal Sealing Components | High-temperature and swell-resistant special fluoroelastomer (FKM) |

| Unit Net Weight | Approx. 0.85 kg / unit |

| Factory Testing Standards | 100% automated test bench verification of electromagnetic response and flow rate |

| </Specifications Table> |  |

Heavy-duty tractor-trailer long-haul freight operations: Heavy trucks equipped with large-displacement diesel engines operating at full load on highways for extended periods. Maintenance personnel replace this electronic fuel actuator when vehicles exhibit symptoms such as unstable idle (hunting), sluggish acceleration, or insufficient power when climbing hills in high gears. Post-replacement, electromagnetic response is restored to rapid speeds and fuel delivery becomes stable and smooth, ensuring freight tasks are completed on time and efficiently.

High-load scenarios for mining dump trucks and generator sets: Heavy-duty mining equipment and industrial generator sets operating continuously under high loads in field environments. When equipment experiences slow starting, rough idling, or stalling under load, the maintenance team installs this high-specification actuator assembly. Precise electromagnetic control allows the engine to instantly deliver robust torque at low RPMs, ensuring smooth operation even under heavy loads.

Q: Can the product be used immediately after installation? Is additional calibration required?

A: Electromagnetic response and flow rate calibration are completed on dynamic test benches prior to shipment. Provided the fuel system is clean, the unit can be put into service immediately after professional installation—following standard torque specifications and wiring connections.

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

A: We operate our own factory and large-scale warehouses, maintaining substantial, year-round inventory for this model. Standard orders are packed and shipped within 24–48 hours, while high-volume orders can be quickly scheduled for production.

Q: How are product quality and performance ensured before shipment?

A: All actuators undergo clean-room assembly and 100% bench testing across all operating conditions. Tests cover critical parameters such as electromagnetic coil resistance, sealing integrity, high-frequency response speed, and flow control; our rigorous standards ensure that every unit shipped is a premium product.

Q: What is the warranty period, and how is after-sales support handled?

A: We offer a 12-month warranty. Should a performance failure occur due to non-human factors during the warranty period, we provide rapid replacement or technical support, ensuring you have complete peace of mind.