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The BALDWIN FILTERS BF9912-O 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 can cause costly fuel system damage. This element provides a direct OEM-style replacement for trade professionals servicing diesel-powered mobile equipment and commercial vehicles. It installs in bowl-style separator housings and is a routine service item during scheduled preventive maintenance. The thread size is 1 inch, allowing straightforward fitment into standard separator housings.
This separator element is suited for diesel fuel systems found in agricultural equipment, construction machinery, and commercial vehicles where fuel quality management is critical. It is a recognized cross-reference for several OEM and aftermarket part numbers, making it a practical stocking choice for fleet shops and equipment dealers. Licensed diesel technicians and equipment mechanics perform this replacement as part of standard fuel system maintenance intervals.
The BF9912-O is a compatible replacement for Case 361805A1, Donaldson P551850, Fleetguard FS19775, and Wix 33755 fuel water separator elements.
This element is installed by qualified diesel technicians and equipment mechanics servicing diesel fuel systems. Shut off the fuel supply and relieve any system pressure before removing the separator housing. Dispose of drained water and fuel in accordance with local environmental regulations. Follow equipment manufacturer service intervals and torque guidelines specified in the equipment service manual when reassembling the housing.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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