{"product_id":"5373865-genuine-cummins®-fluid-supply-doser-module","title":"5373865 | Genuine Cummins® Fluid Supply Doser Module","description":"\u003cp\u003e\u003cstrong\u003eDescription: \u003c\/strong\u003eFluid Supply Doser Module\u003cbr\u003e\u003cstrong\u003eCondition: \u003c\/strong\u003eNew\u003cbr\u003e\u003cstrong\u003eBrand: \u003c\/strong\u003eCummins\u003cbr\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 5373865\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment 5373865\u003cspan\u003e:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cul\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003eMedium-Duty (6.7L Engines):\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"4,0,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,1,0,0\"\u003e\u003cb data-path-to-node=\"4,0,1,0,0\" data-index-in-node=\"0\"\u003ePlatforms:\u003c\/b\u003e Cummins ISB6.7, QSB6.7.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,1,1,0\"\u003e\u003cb data-path-to-node=\"4,0,1,1,0\" data-index-in-node=\"0\"\u003eCommon Part Numbers:\u003c\/b\u003e \u003cb data-path-to-node=\"4,0,1,1,0\" data-index-in-node=\"21\"\u003e4387304\u003c\/b\u003e, \u003cb data-path-to-node=\"4,0,1,1,0\" data-index-in-node=\"30\"\u003e5273338\u003c\/b\u003e, \u003cb data-path-to-node=\"4,0,1,1,0\" data-index-in-node=\"39\"\u003e4375026\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,1,2,0\"\u003e\u003cb data-path-to-node=\"4,0,1,2,0\" data-index-in-node=\"0\"\u003eVehicles:\u003c\/b\u003e School buses (Blue Bird, Thomas), Freightliner M2 106, Ford F-650\/750, and medium-duty Ram trucks (Chassis Cab).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003eHeavy-Duty (12L \u0026amp; 15L Engines):\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"4,1,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,1,0,0\"\u003e\u003cb data-path-to-node=\"4,1,1,0,0\" data-index-in-node=\"0\"\u003ePlatforms:\u003c\/b\u003e Cummins ISX15, X15, QSX15, ISX12.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,1,1,0\"\u003e\u003cb data-path-to-node=\"4,1,1,1,0\" data-index-in-node=\"0\"\u003eCommon Part Numbers:\u003c\/b\u003e \u003cb data-path-to-node=\"4,1,1,1,0\" data-index-in-node=\"21\"\u003e5511749\u003c\/b\u003e, \u003cb data-path-to-node=\"4,1,1,1,0\" data-index-in-node=\"30\"\u003e4394627\u003c\/b\u003e, \u003cb data-path-to-node=\"4,1,1,1,0\" data-index-in-node=\"39\"\u003e4387658\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,1,2,0\"\u003e\u003cb data-path-to-node=\"4,1,1,2,0\" data-index-in-node=\"0\"\u003eVehicles:\u003c\/b\u003e Class 8 trucks like Kenworth T680, Peterbilt 579, Freightliner Cascadia, and International LT Series.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003eIndustrial\/Tier 4 Platforms:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"4,2,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,1,0,0\"\u003e\u003cb data-path-to-node=\"4,2,1,0,0\" data-index-in-node=\"0\"\u003ePlatforms:\u003c\/b\u003e Cummins B4.5, F3.8, L9.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,1,1,0\"\u003e\u003cb data-path-to-node=\"4,2,1,1,0\" data-index-in-node=\"0\"\u003eCommon Part Numbers:\u003c\/b\u003e \u003cb data-path-to-node=\"4,2,1,1,0\" data-index-in-node=\"21\"\u003e5418806\u003c\/b\u003e, \u003cb data-path-to-node=\"4,2,1,1,0\" data-index-in-node=\"30\"\u003e5375352\u003c\/b\u003e (This part number is very close to the one you mentioned earlier).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Fluid Supply Doser Module\u003cstrong\u003e 5373865 \u003c\/strong\u003eoften referred to as the DEF Pump or Urea Pump, is the \"heart\" of the Selective Catalytic Reduction (SCR) system. Its primary role is to manage the delivery of Diesel Exhaust Fluid (DEF) to the exhaust stream to reduce harmful nitrogen oxide (\u003cspan class=\"math-inline\" data-math=\"NO_x\" data-index-in-node=\"274\"\u003eNOx\u003c\/span\u003e) emissions.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cul\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,0,0\"\u003e\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003ePressurization:\u003c\/b\u003e The module draws DEF from the storage tank and pressurizes it (usually to around \u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"97\"\u003e9 bar \/ 130 psi\u003c\/b\u003e) so it can be finely misted by the injector.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,1,0\"\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003ePurge Cycle:\u003c\/b\u003e One of its most important features is the \"purge\" function. When the engine is turned off, the module pumps the remaining fluid back into the tank. This prevents the DEF from freezing or crystallizing inside the lines, which could crack the module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eFiltering:\u003c\/b\u003e It contains an internal main filter to protect the precise dosing mechanism from contaminants or crystallized urea.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,3,0\"\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"0\"\u003eElectronic Control:\u003c\/b\u003e It communicates directly with the Engine Control Module (ECM) via the CAN bus to determine exactly how much fluid is needed based on engine load and \u003cspan class=\"math-inline\" data-math=\"NO_x\" data-index-in-node=\"169\"\u003eNOx\u003c\/span\u003e sensor readings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSigns of Faulty 5373865:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cul\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"2,0,0\"\u003e\u003cb data-path-to-node=\"2,0,0\" data-index-in-node=\"0\"\u003eDEF Pressure Faults:\u003c\/b\u003e If the module cannot reach or maintain its operating pressure (typically around \u003cb data-path-to-node=\"2,0,0\" data-index-in-node=\"101\"\u003e130 psi \/ 9 bar\u003c\/b\u003e), the ECM will trigger fault codes like \u003cb data-path-to-node=\"2,0,0\" data-index-in-node=\"157\"\u003e3558\u003c\/b\u003e or \u003cb data-path-to-node=\"2,0,0\" data-index-in-node=\"165\"\u003e3559\u003c\/b\u003e. You may hear the pump \"hunting\" or running constantly without building pressure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"2,1,0\"\u003e\u003cb data-path-to-node=\"2,1,0\" data-index-in-node=\"0\"\u003eCrystallization Leaks:\u003c\/b\u003e White, chalky deposits around the module's fittings or the vent hole indicate that DEF is leaking. Once the fluid dries and crystallizes, it can seize the internal pump mechanism or damage the electrical circuit board.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"2,2,0\"\u003e\u003cb data-path-to-node=\"2,2,0\" data-index-in-node=\"0\"\u003eFailed Purge Cycle:\u003c\/b\u003e If you don't hear the characteristic \"clicking\" or humming sound of the pump running for 30–60 seconds after you turn off the ignition, the purge cycle has failed. This usually leads to frozen or clogged lines in cold weather.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"2,3,0\"\u003e\u003cb data-path-to-node=\"2,3,0\" data-index-in-node=\"0\"\u003eLow DEF Consumption:\u003c\/b\u003e If you notice that you are rarely needing to refill your DEF tank, the module is likely not delivering fluid. This will eventually lead to a \u003cspan class=\"math-inline\" data-math=\"NO_x\" data-index-in-node=\"162\"\u003eNOx\u003c\/span\u003e conversion error and a 5-mph derate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"2,4,0\"\u003e\u003cb data-path-to-node=\"2,4,0\" data-index-in-node=\"0\"\u003eElectrical Communication Codes:\u003c\/b\u003e Fault codes like \u003cb data-path-to-node=\"2,4,0\" data-index-in-node=\"49\"\u003e3591\u003c\/b\u003e indicate the module has lost communication with the engine via the CAN bus, often due to internal short-circuiting from moisture or vibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eCummins®\u003c\/strong\u003e is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days warranty\u003c\/strong\u003e for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.\u003c\/p\u003e","brand":"Cummins®","offers":[{"title":"Default Title","offer_id":48044834062580,"sku":"5373865","price":1429.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/A063w687_1_8dd618a9-e176-49b6-8ee3-7fe1d4b8992a.jpg?v=1710266564","url":"https:\/\/firsttruckparts.com\/products\/5373865-genuine-cummins%c2%ae-fluid-supply-doser-module","provider":"First Truck Parts","version":"1.0","type":"link"}