Flying Bull Cummins filter kit LF14000NN FS19764 — fuel/water separator & spin-on lube filter

Flying Bull LF14000NN FF5776 FS19764 Filter Kit is a complete replacement set that protects Cummins engines by filtering fuel, separating water, and providing spin‑on lube filtration for dependable operation.

This kit bundles three complementary filters designed to work together: a primary fuel/water separator (FS19764), a secondary fuel element (FF5971), and a spin‑on oil/lube filter (LF14001NN). Each part matches or replaces many OEM numbers, simplifying maintenance for fleets, on‑highway trucks, heavy equipment, and service garages. The set aims to reduce downtime by making routine servicing faster and by improving contamination control in fuel and oil systems.

What components are included and which OEM numbers do they replace?

The kit contains one FF5971 secondary fuel filter, one FS19764 primary fuel filter with water separation, and one LF14001NN spin‑on lube filter. Together these replace a broad range of equivalent part numbers used across Cummins applications and other engine manufacturers.

• Included: 1x FF5971 fuel filter, 1x FS19764 fuel/water separator, 1x LF14001NN spin‑on lube filter.
• Cross‑references: FS19765, P550851, PF7930, WF10005, 21737499, 85120233, PF7928, P550849, L9765 and many more.
• Also replaces older/related numbers: LF14000NN, LF9080, P559000, BD7154, 57746XD, FF63041NN variants, 5526400, BF46248, and others.

How does this kit improve fuel system reliability?

The primary fuel/water separator removes free water and larger particulates before fuel reaches the secondary element, which captures finer contaminants. This two‑stage approach minimizes injector wear and keeps combustion more consistent in challenging conditions like high moisture or dirty supply tanks.

• Water separation reduces corrosion and injector damage risk.
• Secondary filtration captures finer soot and debris to protect injectors.
• Combining both filters extends service intervals and stabilizes engine performance.

Is installation and routine maintenance straightforward for mechanics?

Yes — the kit uses familiar spin‑on and cartridge styles so technicians can swap elements quickly during scheduled service. Clear cross‑reference compatibility simplifies ordering the correct parts for Cummins installations and many aftermarket applications.

• Spin‑on lube filter screws on for fast replacement without specialized tools.
• Fuel/water separator includes drain/bleed features typical of OEM designs.
• Compact, service-friendly layouts minimize downtime during filter changes.

Will this kit affect engine performance or longevity?

Proper filtration lowers contaminant levels that contribute to accelerated wear and inconsistent combustion. While filters do not change engine design, maintaining cleaner fuel and oil helps preserve injector condition, reduce unplanned repairs, and support steady power delivery over time.

• Cleaner fuel helps maintain efficient combustion and emissions control systems.
• Reliable lubrication filtration protects bearings and other moving parts.
• Routine replacement reduces likelihood of clogging and related engine stress.

This Flying Bull filter kit is intended for technicians, fleet managers, and owners of Cummins‑powered trucks and equipment who need a comprehensive, cross‑referenced set for fuel and oil system maintenance. It suits preventive maintenance schedules and quick service stops where trusted fitment, fast replacement, and broad OEM compatibility are priorities.