{"product_id":"423-3253-def-pump-backflow-return-connector-for-cat-engines","title":"423-3253 | DEF Pump Backflow (Return) Connector | For CAT® Engines","description":"\u003cp\u003e\u003cstrong\u003eProduct Overview:\u003c\/strong\u003e\u003cbr\u003eDEF Pump Backflow (Return) Connector PN 423-3253 (Bosch F00BH40308) is a replacement return-line fitting for DEF supply modules (dosing pumps) used on CAT® engines and equipment. It installs in the backflow\/return port of the pump and connects the DEF return line back to the tank.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e Replaces CAT 423-3253 and Bosch F00BH40308.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Cross-Reference:\u003c\/strong\u003e The same Bosch return connector is listed under Cummins, CAT, Hino, Volvo, John Deere, Nissan, Perkins and Case IH part numbers (see below).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold Individually:\u003c\/strong\u003e One backflow connector.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Connector Numbers:\u003c\/strong\u003e CAT 423-3253, Bosch F00BH40308, Cummins 4387659, Volvo 24204464, John Deere RE549605, Hino S17M0-E0031, Nissan 20456LC40A, Perkins T400381, Case IH 47364249\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits DEF Pumps:\u003c\/strong\u003e CAT DEF pump groups, including 591-2386, 20R-9603, 20R-4050, 485-9753, 398-4747 (24V) and 398-4746 \/ 591-2385 (12V)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTorque the connector to 4.5 N·m (40 in-lb). Do not over-tighten.\u003c\/li\u003e\n\u003cli\u003eSome Cummins pumps (4387304 \/ 4387305) use the revised backflow connector 4387302 instead. Confirm which connector your pump requires before ordering.\u003c\/li\u003e\n\u003cli\u003eCAT describes 423-3253 as a backflow connector with an integral filter and check valve. Please verify your part number when replacing a CAT connector.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Caterpillar","offers":[{"title":"Default Title","offer_id":68057174933756,"sku":"4233253","price":46.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/3206\/6044\/files\/4233253-def-pump-backflow-return-fitting-white.jpg?v=1793647416","url":"https:\/\/aftertreatmentparts.com\/products\/423-3253-def-pump-backflow-return-connector-for-cat-engines","provider":"AftertreatmentParts.com","version":"1.0","type":"link"}