Fleetguard FF5776 Fuel Filter for Cummins ISX 15L (2010–2019) - 5 Micron Spin-On Secondary OEM Replacement

Fleetguard FF5776 is a genuine OEM secondary spin-on fuel filter engineered to protect Cummins ISX engines by removing fine contaminants and maintaining clean fuel delivery.

If you operate a Cummins ISX 15L (or compatible 12L) from model years 2010–2019, the FF5776 is the factory-grade secondary fuel filter designed to keep the fuel system free of particles that can harm injectors and pumps. Made by Fleetguard (Atmus Filtration Technologies), this spin-on replacement meets or exceeds OEM fit and filtration performance expectations so you can service your fuel system with confidence.

How does the FF5776 improve fuel system reliability?

The FF5776 captures very small particulates before they reach fuel injectors and high-pressure pumps, reducing the risk of clogging and premature wear. Its media and construction are certified to deliver consistent performance under heavy-duty operating conditions.

• 5 micron absolute rating for fine-particle removal
• 98.7% efficiency (SAE J1985) for reliable contaminant capture
• Spin-on design for straightforward replacement and seal integrity
• OEM-compatible materials to withstand diesel system pressures

Which engines and model years fit this filter?

This FF5776 secondary filter is specified for a range of Cummins ISX engines, commonly installed in heavy-duty trucks and industrial applications. Always verify fitment with your engine serial number or parts manual before purchase.

• Designed for Cummins ISX 15L engines and compatible ISX 12L variants
• Commonly used on 2010–2019 model year applications
• Direct OEM replacement for part numbers such as Cummins 2864993, 2893612, 3685306, and 4331007
• Suitable where original secondary spin-on filtration is specified

What are the performance specifications and maintenance tips?

The FF5776 provides a high level of particulate control while keeping fuel flow adequate for modern high-pressure injection systems. Replace the filter at the intervals recommended by Cummins or your vehicle’s service schedule, and inspect for contamination or fuel system anomalies.

• Absolute filtration: 5 microns for injector protection
• Efficiency: 98.7% per SAE J1985 testing standard
• Spin-on format simplifies removal and installation during service
• Consider NanoNet options (FF5825NN) or extended-life FF5686 for longer service intervals

Can this filter be used as a direct OEM replacement?

Yes—Fleetguard FF5776 is manufactured to meet OEM specifications and replaces several equivalent Cummins part numbers. Using a genuine Fleetguard filter helps maintain original equipment fitment and filtration characteristics.

• Matches Cummins replacement numbers including 2864993 and 2893612
• Meets material and sealing requirements for factory fuel systems
• Sold as a single-pack spin-on secondary filter for convenient inventory management
• Compatible with service procedures for secondary fuel filter replacement

Who is this for? Fleetguard FF5776 is aimed at fleet managers, owner-operators, and maintenance technicians who service 2010–2019 Cummins ISX 15L (and compatible 12L) engines and want a dependable OEM-grade secondary fuel filter. Choose this part when you need proven filtration performance, straightforward installation, and compatibility with Cummins-specified service intervals. If your application requires extended-life or NanoNet media, consider Fleetguard alternatives such as FF5686 or FF5825NN.