Mann Filter WK 724/6 Fuel Injectors

Mann Filter WK 724/6 Fuel Injectors

The Mann Filter WK 724/6 Fuel Injectors are engineered to deliver precise fuel delivery and optimal engine performance in a wide range of commercial and industrial applications. Designed with advanced metallurgy and precision machining, these injectors provide reliable operation under demanding conditions.

Key Design Features

• High‑Precision Needle Valve: The needle valve is manufactured from stainless steel alloy 316L, ensuring excellent corrosion resistance and longevity in harsh fuel environments.
• Dual‑Stage Flow Control: A two‑stage flow mechanism allows for fine adjustment of fuel pressure, enabling smooth throttle response and reduced engine knock.
• Compact 77 mm Body: The injector body measures 77 mm, making it compatible with a broad spectrum of fuel rail systems while maintaining a low profile for tight engine bay installations.
• Integrated Water Drain Valve: A threaded water drain valve is incorporated to facilitate easy removal of condensate, preventing moisture‑induced corrosion and ensuring consistent fuel quality.
• Sealed Cartridge Design: The injector cartridge is sealed with a high‑temperature O‑ring, protecting internal components from contaminants and extending service life.

Performance Characteristics

The WK 724/6 injectors are calibrated to deliver accurate fuel metering across a wide range of operating temperatures. Their low pressure drop (0.5 bar) minimizes energy loss, while the high flow rate capacity supports engines up to 200 kW. The injectors exhibit excellent repeatability, with a tolerance of ±2% in fuel delivery.

Material Composition and Durability

The injector body is forged from high‑strength alloy steel (AISI 4140), providing resistance to wear and fatigue. The needle valve’s stainless construction resists oxidation, while the O‑ring material is a fluoropolymer that maintains elasticity at temperatures up to 200 °C. These materials collectively ensure reliable operation for over 10,000 operating hours under normal service conditions.

Compatibility and Applications

The WK 724/6 series is designed for use in:

• Heavy‑Duty Commercial Vehicles: Trucks, buses, and delivery vans that require robust fuel injection systems.
• Industrial Machinery: Generators, compressors, and other equipment where precise fuel control is critical.
• Marine Engines: Vessels operating in saltwater environments benefit from the corrosion‑resistant construction.

These injectors are compatible with a variety of fuel rail systems that accept a 77 mm injector body, including those used by manufacturers such as Steyr, Iveco, and New Holland. The design also supports integration into existing fuel filter assemblies for streamlined maintenance.

Installation Guidelines

1. Preparation: Ensure the engine is cool and disconnect the battery to prevent accidental ignition. Drain any residual fuel from the rail system.
2. Removal of Old Injector: Use a fuel injector removal tool to unscrew the old unit, taking care not to damage the seat or surrounding components.
3. Cleaning: Inspect the injector port for debris. Clean with a non‑solvent cleaner and a soft brush if necessary.
4. Installation: Align the new WK 724/6 injector with the port, ensuring the threaded water drain valve faces upward. Tighten to 25 Nm torque using a calibrated wrench.
5. Sealing: Apply a thin layer of high‑temperature sealant on the O‑ring groove if recommended by the manufacturer’s technical sheet.
6. Reassembly: Reconnect the fuel rail, reattach any electrical connectors, and restore battery connections.

Maintenance Practices

Regular maintenance extends injector life and preserves performance:

• Periodic Inspection: Check for signs of wear or leakage every 12 months or after 5,000 operating hours.
• Water Drain Valve Cleaning: Flush the threaded drain valve with clean fuel to remove any accumulated condensate.
• Sealant Replacement: Replace O‑ring seals every 36 months or if they appear brittle.
• Fuel Quality Monitoring: Use high‑grade fuels and ensure the filtration system is functioning correctly to avoid particulate contamination.

Benefits of Choosing WK 724/6 Fuel Injectors

• Enhanced Engine Efficiency: Precise fuel metering reduces fuel consumption by up to 5%, translating into cost savings over the vehicle’s lifetime.
• Reduced Emissions: Accurate injection timing and pressure help meet stringent emission standards, including Euro 6 compliance.
• Long Service Life: The robust construction and sealed design minimize wear, leading to fewer replacements and lower maintenance costs.
• Easy Integration: Compatibility with existing fuel rail systems eliminates the need for extensive modifications.
• Reliability in Harsh Environments: Corrosion‑resistant materials ensure dependable operation even in marine or industrial settings where moisture and contaminants are prevalent.

Technical Data Summary

Conclusion

The Mann Filter WK 724/6 Fuel Injectors combine advanced engineering, durable materials, and precise fuel delivery to meet the demanding needs of commercial, industrial, and marine applications. Their compact design, integrated water drain valve, and high‑quality construction make them a reliable choice for operators seeking performance, efficiency, and longevity in their fuel injection systems.