Baldwin Filters BF781 Fuel Water Separator Element

Product Description

The BALDWIN FILTERS BF781 is a fuel and water separator element designed to remove free water and particulate contamination from diesel fuel systems. Water intrusion in diesel fuel accelerates injector wear, promotes microbial growth, and causes corrosion in fuel delivery components. The BF781 filters fuel before it reaches the injection system, protecting high-precision fuel injection equipment from moisture-related damage. It is installed by diesel technicians, fleet mechanics, and heavy-equipment service professionals working on automotive and off-highway diesel applications.

The BF781 is suited for use in automotive, light truck, and heavy equipment diesel fuel systems where a water-separating filter element is required. This element serves as a direct OEM-compatible replacement for several cross-referenced filter part numbers from major brands including ACDelco, Case, Caterpillar, Donaldson, Fleetguard, Fram, GMC, Hastings, Purolator, and Wix, making it a versatile service option for shops maintaining mixed diesel fleets.

Key Features

• Separates free water from diesel fuel to protect fuel injection components
• Traps particulate contamination before it reaches injectors or fuel pumps
• Direct cross-reference replacement for multiple OEM and aftermarket filter part numbers
• Thread size of 1 inch for straightforward installation on compatible filter housings
• Lightweight at 1.317 pounds for easy handling during service

Compatibility

The BF781 is a compatible replacement for the following filter part numbers: ACDelco T944, Case 87712547, Caterpillar 9Y4422, Donaldson P779392, Fleetguard FS1090, Fram P3710, GMC 25011285, Hastings FF844, Purolator PER266F, and Wix 33123.

Installation Notes

This element is installed by qualified diesel technicians or fleet service mechanics. Before servicing the fuel filter assembly, relieve any fuel system pressure and ensure the ignition is off. Use appropriate fuel-rated containers to capture residual fuel when removing the old element. Consult the equipment service manual for housing torque requirements and priming procedures before returning the system to service.