{"product_id":"donaldson-p550440-fuel-filter","title":"Donaldson P550440 Fuel Filter","description":"\u003ch2\u003eFuel Filter Overview\u003c\/h2\u003e\u003cp\u003eDonaldson P550440 is a spin-on secondary fuel filter built for heavy-duty fuel systems. It uses cellulose media and a stand pipe design to support secondary-stage filtration in compatible commercial truck and medium-duty applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpin-on secondary fuel filter for service replacement applications\u003c\/li\u003e\n\u003cli\u003eCellulose filter media for fuel contamination control\u003c\/li\u003e\n\u003cli\u003eStand pipe design\u003c\/li\u003e\n\u003cli\u003eISO 19438 efficiency test standard\u003c\/li\u003e\n\u003cli\u003eM16 x 1.5 thread size\u003c\/li\u003e\n\u003cli\u003eDonaldson P550440 part number for identification and ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDonaldson P550440 is a secondary fuel filter designed for spin-on service in diesel fuel delivery systems. The filter measures 120 in length with a 3.02 outer diameter and uses cellulose media to help capture fine contaminants before they reach downstream fuel components. Its 99% efficiency rating is listed at 16 under ISO 19438 testing, and the stand pipe design supports secondary filtration service. This part number, P550440, is used across a wide range of Ford, Freightliner, Peterbilt, and Kenworth applications, including Ford F-600, Ford F-700, and Peterbilt 320 fitments.\u003c\/p\u003e\u003cp\u003eThis part cross-references Hastings FF1008 and Sachs SH5052 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or restricted secondary fuel filter\u003c\/li\u003e\n\u003cli\u003eRestoring fuel flow in diesel filtration systems\u003c\/li\u003e\n\u003cli\u003eHelping reduce injector and pump contamination risk\u003c\/li\u003e\n\u003cli\u003eAddressing service intervals tied to fuel filter maintenance\u003c\/li\u003e\n\u003cli\u003eSupporting proper filtration in spin-on fuel filter setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eConfirm the thread size, gasket dimensions, and filter style before installation. This P550440 fuel filter is a spin-on design, so the sealing surface should be clean and the gasket should seat evenly during service. Verify fitment against the vehicle application and service notes for the exact fuel system configuration.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDonaldson lists this filter to ISO 19438 efficiency test standards, with a secondary filtration design intended for demanding fuel system service.\u003c\/p\u003e","brand":"Donaldson","offers":[{"title":"Default Title","offer_id":53621555396789,"sku":"BBNQ-P550440","price":32.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/VF_P550440_Fro.jpg?v=1793166101","url":"https:\/\/www.partcatalog.com\/products\/donaldson-p550440-fuel-filter","provider":"PartCatalog","version":"1.0","type":"link"}