{"product_id":"at20728-inner-outer-air-filter-kit-ae31724-fit-john-deere-2240-2135-2440-401b","title":"AT20728 Inner Outer Air Filter Kit  AE31724 Fit John Deere 2240 2135 2440 401B","description":"\u003ch2\u003eInner Outer Air Filter Kit for John Deere\u003c\/h2\u003e\u003cp\u003eThis Inner Outer Air Filter Kit, with OEM cross-reference numbers AT20728 and AE31724, is a dual-stage filtration set that replaces both the primary outer filter and the secondary inner safety filter. It helps maintain clean intake air for smoother engine operation and longer component life.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Inner Outer Air Filter Kit for John Deere models 2240, 2135, 2440, and 401B delivers dependable engine protection. The AT20728 and AE31724 cross-reference numbers confirm a ready-to-install replacement set for your tractor or industrial machine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTwo filters in one kit for complete protection of the intake system\u003c\/li\u003e\n\u003cli\u003eOuter filter captures coarse debris while inner filter traps fine particles\u003c\/li\u003e\n\u003cli\u003eDurable media withstands vibration and temperature extremes\u003c\/li\u003e\n\u003cli\u003eOEM-equivalent sizing ensures proper seal against the housing\u003c\/li\u003e\n\u003cli\u003eMatches AT20728 and AE31724 specifications for a correct replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor John Deere 2240\u003c\/li\u003e\n\u003cli\u003efor John Deere 2135\u003c\/li\u003e\n\u003cli\u003efor John Deere 2440\u003c\/li\u003e\n\u003cli\u003efor John Deere 401B\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplace filters during scheduled service on agricultural tractors\u003c\/li\u003e\n\u003cli\u003eUse in heavy tillage or harvesting operations with high dust levels\u003c\/li\u003e\n\u003cli\u003eInstall when the existing filter shows visible dirt accumulation or damage\u003c\/li\u003e\n\u003cli\u003eMaintain engine performance in loader or backhoe applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAT20728, AE31724\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFilter Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInner and outer air filter kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual-stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this kit fit all serial numbers of the listed models? \u003cstrong\u003eA:\u003c\/strong\u003e Fitment can vary by serial number, so always verify your machine's air filter housing dimensions against the AT20728 and AE31724 specs before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the difference between the inner and outer filter? \u003cstrong\u003eA:\u003c\/strong\u003e The outer filter catches large debris and is the primary filter, while the inner safety filter traps finer dust particles that pass through, providing backup protection during maintenance.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Part Outfitters","offers":[{"title":"Default Title","offer_id":46611109314746,"sku":"ZZ3F07490","price":81.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/2476\/1786\/files\/s-l1600_d12a8a31-784f-45cd-81ec-48c3ec7e2dbc.jpg?v=1789005384","url":"https:\/\/partoutfitters.com\/products\/at20728-inner-outer-air-filter-kit-ae31724-fit-john-deere-2240-2135-2440-401b","provider":"Part Outfitters","version":"1.0","type":"link"}