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Donaldson · Filtration
P551855
In stock · ships from Knoxville
The Donaldson P551855 is a primary spin-on fuel filter/water separator for diesel engines.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 8 applications
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All confirmed applications for this part number.
Freightliner
Hino
Isuzu
Other applications
Freightliner
Hino
Isuzu
Other applications
Fits Racor R90T and any OEM housing that uses a 1-14 UN thread, 4.24 in OD, and 6.11 in overall length filter. Directly interchanges with Fleetguard FS19551/FS19574 and many OEM part numbers listed in cross references. Verify thread size and canister dimensions before installation.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 24.
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It captures solid particles down to 10 microns and removes emulsified water from fuel to protect high-pressure injectors, pumps, and fuel lines. Designed to fit Racor R90T-style housings, it is widely used on heavy-duty trucks, buses, and off-highway equipment. Regular replacement prevents corrosion, injector wear, and power loss, especially when a water-in-fuel warning appears.
Part Number: P551855
SPIN ON ASSY,LIQ 108 SERIES 132 LONG 1-14 UN THD
Category: Donaldson- F
Unit: ea
Dealer: KP Services Crossville
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