Original MANN-FILTER Fuel filter WK 940/20 – For Utility Vehicles

Original MANN‑FILTER Fuel Filter WK 940/20 – For Utility Vehicles

The MANN‑FILTER Fuel Filter WK 940/20 is a high‑performance, OEM‑grade component engineered to protect the fuel system of commercial and utility vehicles. Designed for rigorous duty cycles, it delivers reliable filtration while maintaining optimal fuel flow.

Key Design Features

• Thread Specification: M 18 × 1.5 – ensuring a secure, leak‑free connection on standard truck and bus fuel lines.
• Compact Profile: Outer diameter of 93 mm with a height that fits within tight engine bay spaces without compromising airflow.
• Durable Construction: High‑grade polypropylene housing combined with a multi‑layer filtration media to resist abrasion, chemical attack, and high temperatures.
• Low Pressure Drop: Engineered to maintain fuel pressure within ±5 % of the original specification, preserving engine performance and efficiency.

Intended Applications

The WK 940/20 is specifically tailored for a wide range of utility vehicles, including:

• Commercial Trucks – from light delivery vans to heavy haulers.
• Buses and Coaches – ensuring clean fuel for long‑haul passenger transport.
• Specialty Vehicles – such as refuse trucks, tow vehicles, and construction equipment that require robust filtration under variable load conditions.

Performance Characteristics

When installed correctly, the WK 940/20 delivers:

• Particle Retention: ≥99.9 % removal of particulates down to 5 µm, protecting injectors and fuel pumps.
• Chemical Resistance: Withstands common diesel additives, biodiesel blends up to B20, and gasoline‑based fuels without degradation.
• Longevity: Rated for a minimum of 30 000 km (or 12 months) under typical service conditions before replacement is recommended.

Installation Guidelines

1. Turn off the engine and relieve fuel system pressure to avoid spills.
2. Remove the existing filter by unscrewing it counter‑clockwise; note that the thread size is M 18 × 1.5.
3. Inspect the mounting flange for damage or corrosion; clean if necessary.
4. Apply a thin layer of fuel‑compatible sealant to the threads (optional but recommended for added leak protection).
5. Screw in the new WK 940/20 filter clockwise until snug, then hand‑tighten an additional quarter turn.
6. Re‑pressurize the system and check for leaks before operating the vehicle.

Maintenance & Replacement Schedule

Regular inspection is essential to maintain fuel quality:

• Check filter condition during routine service intervals (every 10 000 km or 4 months).
• Replace if the filter becomes visibly clogged, discolored, or if a drop in fuel pressure is detected.
• Store unused filters in a cool, dry place to preserve media integrity.

Benefits for Fleet Operators

• Reduced Engine Wear: By preventing contaminants from reaching critical components, the filter extends engine life and reduces maintenance costs.
• Consistent Fuel Flow: Maintains optimal fuel pressure, ensuring reliable start‑up and smooth acceleration under load.
• Compliance with Emission Standards: Clean fuel contributes to lower particulate emissions, aiding regulatory compliance.
• Easy Replacement: The standard M 18 × 1.5 thread allows quick swaps without specialized tools.

Compatibility Summary

The WK 940/20 is engineered for a broad spectrum of utility vehicles, making it an ideal choice for fleets that operate diverse vehicle types. Its robust construction and precise threading guarantee a secure fit across multiple makes and models, ensuring consistent performance regardless of operating conditions.

Conclusion

For fleet managers and maintenance teams seeking a reliable, high‑quality fuel filter, the MANN‑FILTER Fuel Filter WK 940/20 offers proven durability, precise engineering, and straightforward installation. By safeguarding the fuel system against contaminants, it protects engine integrity, enhances performance, and supports long‑term operational efficiency.