Fleetguard LF777 Oil Filter

Technical Data

  • OEM Number: 3890706, 3318853, 3889310, 3889311
  • MPN: LF777
  • Filter Media: Cellulose
  • Micron Rating: 25 Micron (Nominal)
  • Engine Family:
  • Filter Type: Oil Filter

Dimensions

Overall length 136
Outer diameter 93
Gasket outer diameter 71
Inner diameter 61
Thread 1‑16 UN

Cross References

Baldwin

  • BT7349

Donaldson

  • P550388

WIX

  • 51794

MANN

  • W950/26

Compatible Engines

  • No compatible engines added.

Application Notes

The Fleetguard LF777 is designed for heavy‑duty diesel lubrication systems used in marine generator sets, auxiliary engines, and industrial power units. It provides full‑flow oil filtration for engines operating under continuous load, high vibration, and extended service intervals. The LF777 is suitable for medium‑speed and high‑speed marine diesel engines commonly found in commercial vessels, offshore equipment, and shipboard power systems.

Additional Notes

Service Intervals — Recommended for standard oil change intervals in medium‑duty diesel engines. Bypass Valve — Includes an internal bypass valve to maintain lubrication flow during cold starts or high restriction. Compatibility — Suitable for full‑flow lubrication systems; not intended for high‑capacity marine propulsion engines (e.g., Wärtsilä, MAN, CAT). Installation — Pre‑fill with clean engine oil before installation to reduce dry‑start wear. Operating Conditions — Designed for continuous‑duty generator sets and auxiliary engines.

Fleetguard LF777 – Full-Flow Lube Oil Filter

The Fleetguard LF777 is a high-quality full-flow oil filter designed for reliable lubrication
filtration in medium-duty diesel and gas engines. Built with a durable steel housing and proven
cellulose media, it provides consistent protection against harmful contaminants that can reduce
engine performance and shorten service life.

  • Filter Type: Oil Filter (Full-Flow)
  • Part Number: LF777
  • Filter Media: Cellulose
  • Micron Rating: 25 Micron (Nominal)
  • Applications: Generator sets, industrial engines, construction equipment, auxiliary marine engines

The LF777 uses a cellulose-based media engineered to deliver dependable filtration efficiency
for standard service intervals. Its internal bypass valve ensures continuous oil flow during
cold starts or when restriction increases, helping to prevent lubrication starvation and
reducing wear on critical engine components.

This filter is suitable for full-flow lubrication systems and is commonly used in stationary
power generation, industrial machinery, and auxiliary marine applications. It is designed to
meet OEM requirements and maintain stable performance under continuous-duty operating conditions.

For best results, pre-fill the filter with clean engine oil before installation and lightly oil
the gasket to ensure proper sealing. After installation, allow the engine to idle briefly to
verify oil pressure and check for leaks.


Read more