{"product_id":"donaldson-p551843-fuel-water-separator-volvo-mack","title":"Donaldson P551843 Fuel Filter Water Separator | Volvo D11, D13, D16 \u0026 Mack MP Engines","description":"\u003ch2\u003eDonaldson P551843 Fuel Filter Water Separator for Volvo \u0026amp; Mack Diesel Engines\u003c\/h2\u003e\n\u003cp\u003eThe Donaldson P551843 Fuel Filter Water Separator is a premium spin-on filtration solution designed to remove harmful water and contaminants from diesel fuel before they reach sensitive fuel system components. Engineered for heavy-duty truck applications, the P551843 helps protect injectors, fuel pumps, and high-pressure fuel systems while improving reliability and reducing costly downtime.\u003c\/p\u003e\n\u003cp\u003eWater contamination is one of the leading causes of fuel system failures in modern diesel engines. The Donaldson P551843 is designed to capture and remove up to 99% of water particles while filtering harmful contaminants that can damage injectors and reduce engine performance. Its durable spin-on design provides easy servicing and dependable performance in demanding operating conditions. :contentReference[oaicite:0]{index=0}\u003c\/p\u003e\n\u003cp\u003eCommonly used in Volvo D11, D13, D16 and Mack MP-series engine applications, the P551843 is trusted by fleets and owner-operators seeking maximum fuel system protection and longer component life. :contentReference[oaicite:1]{index=1}\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium fuel filter and water separator\u003c\/li\u003e\n\u003cli\u003eRemoves up to 99% of water particles\u003c\/li\u003e\n\u003cli\u003eProtects fuel injectors and fuel pumps\u003c\/li\u003e\n\u003cli\u003eHelps prevent fuel system corrosion\u003c\/li\u003e\n\u003cli\u003eSpin-on design for easy installation\u003c\/li\u003e\n\u003cli\u003eHeavy-duty construction for commercial applications\u003c\/li\u003e\n\u003cli\u003eDesigned for severe-duty operating environments\u003c\/li\u003e\n\u003cli\u003eImproves fuel system reliability\u003c\/li\u003e\n\u003cli\u003eFleet-proven Donaldson filtration technology\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDonaldson states the P551843 is engineered to capture and remove up to 99% of water particles while helping extend injector life and prevent fuel system contamination. :contentReference[oaicite:2]{index=2}\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e P551843\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Donaldson\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Type:\u003c\/strong\u003e Fuel Filter \/ Water Separator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Spin-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 3.66\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1\"-14 UN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Application:\u003c\/strong\u003e Racor R260P Systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicron Rating:\u003c\/strong\u003e 30 Micron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Separation Efficiency:\u003c\/strong\u003e Up to 99%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Donaldson P551843 features a 3.66-inch outside diameter, 1\"-14 thread, and is commonly used as a fuel\/water separator in Racor R260P applications. :contentReference[oaicite:3]{index=3}\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eBenefits of Replacing Your Fuel Water Separator\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProtects expensive fuel injectors\u003c\/li\u003e\n\u003cli\u003eRemoves water contamination from fuel\u003c\/li\u003e\n\u003cli\u003eReduces fuel system wear\u003c\/li\u003e\n\u003cli\u003eImproves engine performance\u003c\/li\u003e\n\u003cli\u003eHelps prevent injector failures\u003c\/li\u003e\n\u003cli\u003eSupports maximum fuel economy\u003c\/li\u003e\n\u003cli\u003eReduces maintenance costs\u003c\/li\u003e\n\u003cli\u003eImproves vehicle uptime\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Symptoms of a Restricted Fuel Water Separator\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHard starting\u003c\/li\u003e\n\u003cli\u003eLoss of engine power\u003c\/li\u003e\n\u003cli\u003ePoor fuel economy\u003c\/li\u003e\n\u003cli\u003eFuel pressure faults\u003c\/li\u003e\n\u003cli\u003eInjector performance issues\u003c\/li\u003e\n\u003cli\u003eCheck engine light\u003c\/li\u003e\n\u003cli\u003eExcessive water contamination\u003c\/li\u003e\n\u003cli\u003eScheduled PM interval reached\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo VNL Series\u003c\/li\u003e\n\u003cli\u003eVolvo VNR Series\u003c\/li\u003e\n\u003cli\u003eVolvo VHD Series\u003c\/li\u003e\n\u003cli\u003eVolvo D11 Engines\u003c\/li\u003e\n\u003cli\u003eVolvo D13 Engines\u003c\/li\u003e\n\u003cli\u003eVolvo D16 Engines\u003c\/li\u003e\n\u003cli\u003eMack Anthem\u003c\/li\u003e\n\u003cli\u003eMack Pinnacle\u003c\/li\u003e\n\u003cli\u003eMack Granite\u003c\/li\u003e\n\u003cli\u003eMack MP7 Engines\u003c\/li\u003e\n\u003cli\u003eMack MP8 Engines\u003c\/li\u003e\n\u003cli\u003eMack MP10 Engines\u003c\/li\u003e\n\u003cli\u003eRacor R260P Fuel Systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFleetPride cross-reference data and application listings show the P551843 commonly used in Volvo and Mack diesel engine applications. :contentReference[oaicite:4]{index=4}\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eMajor Cross Reference Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFleetguard FS19735\u003c\/li\u003e\n\u003cli\u003eBaldwin BF1366\u003c\/li\u003e\n\u003cli\u003eBaldwin BF1366-O\u003c\/li\u003e\n\u003cli\u003eLuber-Finer LFF3294\u003c\/li\u003e\n\u003cli\u003eLuber-Finer LFF3293\u003c\/li\u003e\n\u003cli\u003eWIX 33775\u003c\/li\u003e\n\u003cli\u003eMann WK94026\u003c\/li\u003e\n\u003cli\u003eMann WK94033X\u003c\/li\u003e\n\u003cli\u003eHengst H700WK\u003c\/li\u003e\n\u003cli\u003eFram PS10872\u003c\/li\u003e\n\u003cli\u003eRacor R260P\u003c\/li\u003e\n\u003cli\u003eDonaldson P559628\u003c\/li\u003e\n\u003cli\u003eTruckPro DNP551843\u003c\/li\u003e\n\u003cli\u003eVolvo 20480593\u003c\/li\u003e\n\u003cli\u003eVolvo 20514654\u003c\/li\u003e\n\u003cli\u003eVolvo 20998346\u003c\/li\u003e\n\u003cli\u003eVolvo 20998367\u003c\/li\u003e\n\u003cli\u003eVolvo 20539582\u003c\/li\u003e\n\u003cli\u003eVolvo 22480372\u003c\/li\u003e\n\u003cli\u003eMack 20539578\u003c\/li\u003e\n\u003cli\u003eNAPA 3775\u003c\/li\u003e\n\u003cli\u003eCarquest 86775\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAdditional interchange numbers include 56036989, 7420514654, 7420998634, KC362D, F55928, SN55006, SN926030, J018289, and numerous Volvo and Mack OEM references.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Fuel Water Separation Matters\u003c\/h3\u003e\n\u003cp\u003eModern diesel fuel systems operate at extremely high pressures and are highly sensitive to contamination. Water in diesel fuel can damage injectors, cause corrosion, reduce lubrication, and lead to expensive repairs. Regular replacement of fuel water separators helps maintain fuel quality and maximize fuel system life. Industry technicians frequently emphasize the importance of water separation in diesel fuel systems to prevent contamination-related failures. :contentReference[oaicite:6]{index=6}\u003c\/p\u003e\n\u003chr\u003e\n\u003cdiv style=\"background: #f8f8f8; padding: 25px; border-left: 4px solid #ff6a00; margin: 25px 0;\"\u003e\n\u003ch3\u003e🔥 Protect Your Fuel System Before Water Causes Costly Damage\u003c\/h3\u003e\n\u003cp\u003eReplacing a fuel water separator costs far less than replacing injectors, fuel pumps, or high-pressure fuel system components. The Donaldson P551843 helps remove harmful water and contaminants before they can damage expensive engine components.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✔ Removes Up To 99% Of Water Particles\u003c\/li\u003e\n\u003cli\u003e✔ Protects Fuel Injectors\u003c\/li\u003e\n\u003cli\u003e✔ Volvo \u0026amp; Mack Applications\u003c\/li\u003e\n\u003cli\u003e✔ Fleet-Proven Donaldson Quality\u003c\/li\u003e\n\u003cli\u003e✔ Heavy-Duty Commercial Performance\u003c\/li\u003e\n\u003cli\u003e✔ Helps Reduce Downtime\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv style=\"background: #fff7ef; padding: 20px; border: 1px solid #ffb366; border-radius: 8px; margin-top: 20px;\"\u003e\n\u003ch3\u003e🚛 Frequently Purchased Together\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✔ Donaldson P550529 Fuel Filter\u003c\/li\u003e\n\u003cli\u003e✔ Engine Oil Filters\u003c\/li\u003e\n\u003cli\u003e✔ Air Filters\u003c\/li\u003e\n\u003cli\u003e✔ Preventive Maintenance Kits\u003c\/li\u003e\n\u003cli\u003e✔ Fuel System Service Components\u003c\/li\u003e\n\u003cli\u003e✔ Diesel Exhaust Fluid Maintenance Supplies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eComplete your PM service and maximize fuel system protection by replacing all filtration components together.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Donaldson","offers":[{"title":"Default Title","offer_id":66905578930221,"sku":null,"price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/donaldson-p551843-fuel-filter-water-separator-volvo-d11-d13-d16-mack-mp-enginesdonaldsonperformance-diesel-group-6241136.jpg?v=1782860887","url":"https:\/\/performancedieselgroup.com\/products\/donaldson-p551843-fuel-water-separator-volvo-mack","provider":"Performance Diesel Group","version":"1.0","type":"link"}