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Donaldson · Filtration
P557009
In stock · ships from Knoxville
This is a Donaldson fuel filter and water separator cartridge for diesel engines.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 3 applications
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All confirmed applications for this part number.
Kenworth
Peterbilt
Other applications
Kenworth
Peterbilt
Other applications
Primarily listed for PACCAR MX-series engines in Kenworth and Peterbilt trucks. Always verify against your engine/vehicle service manual.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 7 of 7.
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It removes water and solid contaminants down to 30 microns before fuel reaches the injectors and high‑pressure pump, helping prevent costly injector wear and corrosion. It is a direct replacement for the PACCAR K371009 filter used in many Kenworth and Peterbilt trucks, and is commonly changed during scheduled fuel system maintenance.
Part Number: P557009
FUEL WATER SEPERATOR
Dealer: Post Onsite
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