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Donaldson · Filtration
P551852
In stock · ships from Knoxville
The Donaldson P551852 is a spin‑on fuel filter and water separator for diesel engines.
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Verified fitment for 6 applications
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All confirmed applications for this part number.
Ford
Freightliner
Hino
Other applications
Ford
Freightliner
Hino
Other applications
Spin‑on water‑separator filter with 1‑14 UN mount. Fits many heavy‑duty diesel engines that call for this Donaldson or the listed cross‑reference OEM numbers. Always confirm thread size and bowl thread (3‑3/4‑10 BUTT) against the existing filter head.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 23.
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It captures rust, dirt, and water droplets down to 7‑9 microns (95‑99% efficiency) using meltblown media, helping shield injection pumps and injectors from wear and corrosion. The filter threads onto a mounting head with 1‑14 UN threads and has a 3‑3/4‑10 BUTT bowl thread for a collection bowl. Replace it at the engine manufacturer’s interval or whenever the water‑in‑fuel warning light comes on to maintain clean, dry fuel.
Part Number: P551852
FUEL WATER SEPARATOR
Category: Donaldson- F
Vendor: Donaldson
Dealer: Knox Trailers
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