{"title":"CAT Filters","description":"\u003cp\u003eCaterpillar filters by part number: fuel and water separators such as 326-1643, engine oil filters such as 569-8036, and primary and secondary air filters such as 110-6331.\u003c\/p\u003e\u003cp\u003eCAT part numbers are written with a hyphen, but our search finds them with or without it. Each product page shows the number in the title and the SKU, so you can confirm it against the filter you are replacing.\u003c\/p\u003e\u003cp\u003eFilters ship FedEx or UPS ground from the closest of our four locations that has them.\u003c\/p\u003e","products":[{"product_id":"caterpillar-air-filter-pn-551-6183","title":"CAT Air Filter | PN 551-6183","description":"\u003cp\u003eThis is a Caterpillar air filter, part number 551-6183. It filters the air going into the engine, keeping dust and contaminants out of the intake while maintaining proper airflow for combustion.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Caterpillar\u003c\/li\u003e\n\u003cli\u003ePart type: Air filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 551-6183\u003c\/li\u003e\n\u003cli\u003eSKU: 7658465\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM Caterpillar part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This is listed as an OEM Caterpillar air filter, part number 551-6183.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement on Caterpillar machines that call for part number 551-6183. We don't have a model list for this filter, so check that 551-6183 matches the air filter listed in your machine's parts manual or on the filter you are replacing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the signs an air filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA restricted air filter can cause loss of power, higher fuel consumption, or dark exhaust smoke. Many machines also have a service indicator for the air filter. Replace the filter at your scheduled interval or sooner in dusty working conditions.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":43873315553383,"sku":"7658465","price":61.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-air-filter-pn-551-6183-filters-823.webp?v=1791485345"},{"product_id":"caterpillar-inline-filter-pn-5256205","title":"CAT Inline Filter | PN 5256205","description":"\u003cp\u003eThis CATERPILLAR inline filter, part number 5256205, is an OEM-equivalent replacement built for Caterpillar equipment. It sits inline in hydraulic and fuel systems and removes contaminants before they reach downstream components.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Inline filter\u003c\/li\u003e\n\u003cli\u003ePart number: 5256205\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7250202\u003c\/li\u003e\n\u003cli\u003eApplication: Hydraulic and fuel system filtration\u003c\/li\u003e\n\u003cli\u003eBuilt to original specifications as a direct replacement\u003c\/li\u003e\n\u003cli\u003eFits standard Caterpillar mounting configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine Caterpillar part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis filter is listed as OEM-equivalent. It is built as a direct replacement for CATERPILLAR part number 5256205 and matches the original specifications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is designed for Caterpillar equipment with standard Caterpillar mounting configurations. Specific machine models are not listed, so confirm that part number 5256205 matches your parts book or the filter currently installed before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does this filter do on the machine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt removes contaminants from hydraulic and fuel systems. This helps maintain equipment efficiency and protects the components it feeds.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105128575079,"sku":"7250202","price":76.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-inline-filter-pn-5256205-filters-501.webp?v=1791485413"},{"product_id":"cat-filter-pn-233-5184","title":"CAT Filter | PN 233-5184","description":"\u003cp\u003eThis is a CAT engine air filter, OEM part number 233-5184. It removes dust and contaminants from intake air before they reach the engine, which protects internal components from wear and keeps the engine breathing properly.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003ePart type: Engine air filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 233-5184\u003c\/li\u003e\n\u003cli\u003eSKU: 7571938\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement for CAT machines that call for part number 233-5184. Check that number against your parts manual or the filter currently installed before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this is the right filter for my machine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the part number on your existing filter or in your CAT service literature to 233-5184. If the numbers match, this is the correct replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are signs the air filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCommon signs include a restriction indicator showing red, loss of power, black exhaust smoke, and higher fuel use. Follow the service interval in your machine's maintenance schedule. Change the filter sooner in heavy dust.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105465626727,"sku":"7571938","price":54.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-pn-233-5184-filters-130.webp?v=1791481766"},{"product_id":"cat-element-separator-pn-5584721","title":"CAT Element-Separator | PN 5584721","description":"\u003cp\u003eThis is the CAT Element-Separator, part number 5584721, a replaceable separator element for Caterpillar equipment. It is a service item, swapped out during scheduled maintenance or when the existing element is worn or damaged.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart name: Element-Separator\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 5584721\u003c\/li\u003e\n\u003cli\u003eStore SKU: 12720459\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this part fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse CAT part number 5584721 to confirm fitment against your machine's serial number in the Caterpillar parts manual, or match it to the part number on the element you are replacing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is listed as a CAT part under Caterpillar part number 5584721.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the element be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFollow the service interval in your machine's operation and maintenance manual. Replace it sooner if the element shows damage when inspected.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105524707431,"sku":"12720459","price":62.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-element-separator-pn-5584721-filters-966.webp?v=1791485474"},{"product_id":"cat-filter-pn-339-1048","title":"CAT Filter | PN 339-1048","description":"\u003cp\u003eThis is a CAT filter, part number 339-1048, a replacement filter for Caterpillar equipment. It keeps contaminants out of the system it serves and seals properly on machines that call for this part number.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 339-1048\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7191546\u003c\/li\u003e\n\u003cli\u003eComponent type: Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement on Caterpillar equipment that calls for CAT part number 339-1048. Check your machine's parts manual or serial number to confirm that 339-1048 is the correct filter for your unit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine CAT part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe listing identifies this as a CAT filter under part number 339-1048. If you need to confirm it matches the number on your old filter, compare the part number before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should this filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the service interval in your machine's maintenance schedule, or sooner if you see a restriction indicator, drop in performance, or signs of contamination in the system it protects.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105537093735,"sku":"7191546","price":84.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-pn-339-1048-filters-796.webp?v=1791481768"},{"product_id":"cat-fuel-filter-pn-441-5111","title":"CAT Fuel Filter | PN 441-5111","description":"\u003cp\u003eThis CAT fuel filter, part number 441-5111, is a direct replacement for compatible Caterpillar machinery. It removes contaminants and water from the fuel system before fuel reaches the engine.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Fuel filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 441-5111\u003c\/li\u003e\n\u003cli\u003eFunction: Removes contaminants and water from fuel\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7191552\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement for CAT equipment that uses part number 441-5111. Check the number on your current filter or in your machine's parts manual before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does this filter remove from the fuel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CAT 441-5111 fuel filter removes contaminants and water from the fuel system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat part number should I match when ordering?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the OEM part number 441-5111. Our store SKU for this filter is 7191552.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105557934183,"sku":"7191552","price":20.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-fuel-filter-pn-441-5111-filters-678.webp?v=1791481771"},{"product_id":"cat-fuel-element-pn-360-8960","title":"CAT Fuel Element | PN 360-8960","description":"\u003cp\u003eThis is a CAT fuel element, OEM part number 360-8960, built to Caterpillar specifications. It filters the fuel before it reaches the injectors, which keeps contaminants out of the fuel system and helps cut injector wear. It is a direct replacement for the original element.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT (Caterpillar)\u003c\/li\u003e\n\u003cli\u003eOEM part number: 360-8960\u003c\/li\u003e\n\u003cli\u003ePart type: Fuel filter element\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7191549\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It is an OEM CAT fuel element, part number 360-8960, made to Caterpillar specifications as a direct replacement for the original.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck your machine's parts manual or look up your serial number to confirm that it calls for CAT 360-8960 before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the fuel element do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt removes contaminants from the fuel before it reaches the injectors. That protects the injectors from wear and keeps combustion running efficiently.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should it be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the service interval in your machine's maintenance schedule. A restricted fuel element can cause hard starting, rough running, or loss of power, so check it sooner if you notice those symptoms.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105601941607,"sku":"7191549","price":41.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-fuel-element-pn-360-8960-filters-138.webp?v=1791481774"},{"product_id":"cat-filter-fuel-water-pn-326-1643","title":"CAT Fuel Water Filter | PN 326-1643","description":"\u003cp\u003eThis is a CAT fuel water separator filter, OEM part number 326-1643. It removes water and contaminants from the diesel fuel system before they reach the engine, helping protect injectors and fuel system components from corrosion and damage.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Fuel water separator filter\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 326-1643\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7191545\u003c\/li\u003e\n\u003cli\u003eFunction: Separates water and filters contaminants from diesel fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This is listed as a genuine CAT filter, part number 326-1643, built to original equipment specifications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement on Caterpillar equipment that calls for CAT part number 326-1643. Check the part number against your machine's parts book or the filter currently installed to confirm fitment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy does a fuel water separator matter on a diesel machine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWater and contaminants in diesel fuel can cause corrosion and injector damage. The separator catches them before they reach the injection system, which helps keep the engine running as it should.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105615179879,"sku":"7191545","price":90.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-fuel-water-filter-pn-326-1643-filters-520.webp?v=1791492550"},{"product_id":"cat-filter-pn-311-3901","title":"CAT Filter | PN 311-3901","description":"\u003cp\u003eThis is a CAT filter, part number 311-3901, an engine filter for Caterpillar equipment. It removes contaminants to protect the engine and keep it running as intended. It is a direct replacement for PN 311-3901.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003ePart type: Engine filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 311-3901\u003c\/li\u003e\n\u003cli\u003eSKU: 7191540\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is made for Caterpillar equipment that uses CAT part number 311-3901. Check the part number against your machine's parts book or the filter currently installed before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat part number does this replace?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement for CAT 311-3901.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should this filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the interval listed in your machine's maintenance manual, or sooner if the machine runs in heavy dust or dirty conditions. Changing the filter on schedule keeps contaminants out of the engine and helps avoid unplanned downtime.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105622323303,"sku":"7191540","price":71.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-pn-311-3901-filters-866.webp?v=1791481806"},{"product_id":"cat-oil-filter-pn-220-1523","title":"CAT Oil Filter | PN 220-1523","description":"\u003cp\u003eThis is a genuine Caterpillar oil filter, OEM part number 220-1523. It filters contaminants out of the engine oil to protect internal engine components and help maintain engine life. It is a direct replacement for the factory filter on compatible CAT equipment.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Engine oil filter\u003c\/li\u003e\n\u003cli\u003eBrand: Caterpillar (CAT)\u003c\/li\u003e\n\u003cli\u003eOEM part number: 220-1523\u003c\/li\u003e\n\u003cli\u003eSKU: 7191536\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This is a genuine Caterpillar filter, part number 220-1523, built to factory specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement on compatible CAT equipment that calls for Caterpillar 220-1523. Check your machine's parts manual or confirm the part number against your serial number before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should this filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at every oil change, following the service interval in your machine's operation and maintenance manual. Change it sooner if an oil analysis shows elevated contamination or the filter has been damaged.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44105626681447,"sku":"7191536","price":21.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-oil-filter-pn-220-1523-filters-129.webp?v=1791481809"},{"product_id":"cat-element-secondary-filter-pn-321-2412","title":"CAT Filter Element Secondary | PN 321-2412","description":"\u003cp\u003eThis is a CAT secondary filter element, part number 321-2412. It sits behind the primary element in the air intake system and catches contaminants that get past the primary, protecting the engine.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 321-2412\u003c\/li\u003e\n\u003cli\u003ePart type: Secondary filter element\u003c\/li\u003e\n\u003cli\u003eApplication: Air intake filtration\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7191543\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CAT 321-2412 secondary element is a replacement part for Caterpillar machinery that calls for this part number. The listing does not name specific models, so confirm that 321-2412 is the number in your machine's parts book or on the element you are replacing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this is the right part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the part number. This element is CAT 321-2412. If your old secondary element or your parts manual shows 321-2412, this is the correct replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the secondary element be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFollow the service interval in your machine's maintenance manual. Also inspect the secondary element whenever you service the primary. Replace it if it is dirty, damaged, or if the primary element has failed and let dirt through.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109005750375,"sku":"7191543","price":84.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-element-secondary-pn-321-2412-filters-501.webp?v=1791492616"},{"product_id":"cat-air-filter-seondary-pn-110-6331","title":"CAT Air Filter Seondary | PN 110-6331","description":"\u003cp\u003eThis is a CAT secondary air filter, part number 110-6331, for Caterpillar equipment. The secondary element sits inside the air cleaner behind the primary filter and serves as a backup, catching dust, debris, and contaminants before they reach the engine.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Secondary air filter\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 110-6331\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7562033\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt fits Caterpillar equipment that calls for CAT part number 110-6331. Confirm the number against your machine's parts manual or the filter you are replacing before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine CAT part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is listed as a CAT air filter under part number 110-6331. If you need confirmation of origin for warranty or fleet records, contact us before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the secondary filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMany shops replace the secondary element on a set interval, often every few primary filter changes, or whenever the primary element is found damaged or dust has gotten past it. Follow the service interval in your machine's operation and maintenance manual.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109006143591,"sku":"7562033","price":59.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-air-filter-seondary-pn-110-6331-filters-841.webp?v=1791481869"},{"product_id":"cat-oil-filter-pn-7w-2326","title":"CAT Oil Filter | PN 7W-2326","description":"\u003cp\u003eThis is a CAT oil filter, part number 7W-2326. It removes contaminants from the engine oil as it circulates, protecting internal engine components between oil changes.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003ePart type: Oil filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 7W-2326\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7191555\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt fits CAT equipment that calls for part number 7W-2326. Check your machine's parts manual or confirm by serial number before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this a genuine CAT part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is listed as a CAT oil filter under part number 7W-2326. If you need packaging or sourcing details before you order, contact us and we'll confirm.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen should this oil filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChange the filter with every oil change, following the service interval in your engine's maintenance schedule. Shorten the interval if the machine runs in heavy dust or other severe conditions.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109012041831,"sku":"7191555","price":28.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-oil-filter-pn-7w-2326-filters-400.webp?v=1791481872"},{"product_id":"cat-fuel-filter-pn-479-4133","title":"CAT Fuel Filter | PN 479-4133","description":"\u003cp\u003eThis is a CAT fuel filter, Caterpillar part number 479-4133. It removes contaminants from the fuel before it reaches the injectors and fuel system, which helps keep fuel delivery steady and protects those components from damage. It is a direct replacement for 479-4133 on Caterpillar equipment.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Fuel filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CAT (Caterpillar)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e 479-4133\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStore SKU:\u003c\/strong\u003e 7191553\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine CAT part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This is a genuine CAT fuel filter, Caterpillar part number 479-4133.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt fits Caterpillar equipment that calls for part number 479-4133. Check your machine's parts manual or confirm by serial number before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat part number does this replace?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a direct replacement for CAT 479-4133.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the signs a fuel filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA restricted fuel filter can cause hard starting, loss of power under load, rough running, or stalling. Follow the service interval in your equipment's maintenance schedule, and replace the filter sooner if you are running questionable fuel.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109012435047,"sku":"7191553","price":69.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-fuel-filter-pn-479-4133-filters-550.webp?v=1791481875"},{"product_id":"cat-air-filter-primary-pn-110-6326","title":"CAT Air Filter Primary | PN 110-6326","description":"\u003cp\u003eThis is a CAT primary air filter, part number 110-6326. The primary element is the main air filter in the intake system, catching dust and debris before intake air reaches the engine.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT (Caterpillar)\u003c\/li\u003e\n\u003cli\u003ePart type: Primary air filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 110-6326\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7562031\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It is listed as a genuine Caterpillar primary air filter, CAT part number 110-6326.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I confirm it fits my machine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the part number 110-6326 against your machine's parts book or the number printed on the filter you are replacing. If they match, this is the correct primary element.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a primary and a secondary air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe primary filter is the outer element that does most of the filtering and is replaced on a regular service interval. The secondary, or safety, element sits behind it as backup protection if the primary is damaged or removed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are signs the primary air filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCommon signs are an air filter restriction indicator showing red, loss of engine power, more black exhaust smoke than usual, or a filter that is visibly loaded with dirt or damaged. Replace it according to your service schedule or sooner in dusty working conditions.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109022167143,"sku":"7562031","price":78.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-air-filter-primary-pn-110-6326-filters-221.webp?v=1791481878"},{"product_id":"cat-filter-as-water-sep-fuel-pn-363-5819","title":"CAT Filter AS-Water Sep \u0026 Fuel | PN 363-5819","description":"\u003cp\u003eThe CAT Filter AS-Water Sep \u0026amp; Fuel, part number 363-5819, is a fuel filter and water separator assembly for Caterpillar equipment. It pulls water and particulates out of the fuel before they reach the fuel system, which protects injectors and pumps and keeps the engine running right.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart: Filter AS, Water Separator and Fuel\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 363-5819\u003c\/li\u003e\n\u003cli\u003eStore SKU: 7658468\u003c\/li\u003e\n\u003cli\u003eFunction: Separates water and removes particulates from fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CAT 363-5819 is used on Caterpillar equipment. We don't have a model list for this listing, so check your machine's serial number against your CAT parts book or dealer lookup to confirm it calls for 363-5819 before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the part number for this filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe OEM part number is 363-5819. The number 7658468 is our store SKU for this listing, not a manufacturer cross-reference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the signs this filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWater showing up in the separator, hard starting, rough running, or a drop in power can all point to a clogged or saturated fuel filter. Replace it at the interval in your machine's maintenance schedule, or sooner if you're running questionable fuel.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109065257063,"sku":"7658468","price":50.45,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-water-sep-fuel-pn-363-5819-filters-313.webp?v=1791481934"},{"product_id":"cat-filter-pn-565-4266","title":"CAT Filter | PN 565-4266","description":"\u003cp\u003eThis is a CAT filter, part number 565-4266, for Caterpillar equipment. It is a direct replacement for the filter element specified under this part number.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003ePart type: Filter\u003c\/li\u003e\n\u003cli\u003eOEM part number: 565-4266\u003c\/li\u003e\n\u003cli\u003eStore SKU: 10225091\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is listed for Caterpillar equipment. Specific machine models are not listed, so confirm that 565-4266 matches the part number in your machine's parts book or on the filter you are replacing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine CAT part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is listed as a CAT filter under part number 565-4266.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know when this filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the interval in your machine's service manual, or sooner if the filter shows damage, heavy loading, or a restriction warning on the machine. When ordering, match the CAT 565-4266 part number to the filter currently installed.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109144195175,"sku":"10225091","price":70.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-pn-565-4266-filters-950.webp?v=1791481889"},{"product_id":"cat-filter-element-wtr-sep-fuel-pn-523-6604","title":"CAT Filter Element-Wtr Sep \u0026 Fuel | PN 523-6604","description":"\u003cp\u003eThis is a CAT water separator and fuel filter element, OEM part number 523-6604. It handles two jobs in the fuel system: separating water out of the fuel and filtering contaminants before fuel reaches the engine.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CAT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 523-6604\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Filter element, water separator and fuel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Removes water and contaminants from fuel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStore SKU:\u003c\/strong\u003e 8230372\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CAT 523-6604 is intended for Caterpillar equipment. Specific machine models aren't listed here, so check the part number against your machine's parts book or the filter currently installed before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does this filter element do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt combines water separation and fuel filtration in one element. It pulls water out of the fuel and traps contaminants, which protects the fuel system and the engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I replace it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the interval in your machine's maintenance schedule. Change it sooner if the separator is collecting water or the engine shows fuel restriction symptoms such as hard starting or loss of power. Order by part number 523-6604 to get the correct CAT element.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109146783847,"sku":"8230372","price":80.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-filter-element-wtr-sep-fuel-pn-523-6604-filters-636.webp?v=1791481985"},{"product_id":"cat-oil-filter-pn-569-8036","title":"CAT Oil Filter | PN 569-8036","description":"\u003cp\u003eThis is a CAT oil filter, OEM part number 569-8036, for Caterpillar equipment. It removes contaminants from the engine oil and keeps oil flowing to protect the engine between service intervals.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Oil filter\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 569-8036\u003c\/li\u003e\n\u003cli\u003eStore SKU: 8230422\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This is a genuine CAT filter sold under OEM part number 569-8036.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CAT 569-8036 is made for Caterpillar equipment. Check that 569-8036 matches the oil filter number listed in your machine's parts manual or on the filter you are replacing before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should this oil filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at every oil change, following the service interval in your machine's operation and maintenance manual. Replace it sooner if the filter is damaged, leaking, or has been exposed to contaminated oil.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109148913767,"sku":"8230422","price":45.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-oil-filter-pn-569-8036-filters-891.webp?v=1791481986"},{"product_id":"cat-oil-filter-pn-462-1171","title":"CAT Oil Filter | PN 462-1171","description":"\u003cp\u003eThis is a CAT oil filter, part number 462-1171, for Caterpillar machinery and power systems. It filters contaminants and debris out of the engine oil to protect internal engine components. It is a direct replacement part built to Caterpillar specifications.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Oil filter\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 462-1171\u003c\/li\u003e\n\u003cli\u003eStore SKU: 10935796\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine CAT part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis filter is listed as a CAT OEM oil filter, part number 462-1171, built to meet Caterpillar specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CAT 462-1171 is a direct replacement for various CAT machines and power systems. Confirm that 462-1171 matches the part number in your machine's parts book or on the filter you are replacing before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the oil filter be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the interval listed in your machine's service manual, typically at each oil change. A filter that has been left in past its interval can restrict flow or let contaminants circulate through the engine.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109155434599,"sku":"10935796","price":34.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-oil-filter-pn-462-1171-filters-109.webp?v=1791481988"},{"product_id":"cat-outer-air-filter-element-pn-p633607","title":"CAT Outer Air Filter Element | PN P633607","description":"\u003cp\u003eThe CAT Outer Air Filter Element, PN P633607, is the primary element in the engine air intake. It captures dust and contaminants from incoming air before they reach the engine, which protects engine performance and helps extend equipment life.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Outer air filter element\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003ePart number: P633607\u003c\/li\u003e\n\u003cli\u003eStore SKU: 9270528\u003c\/li\u003e\n\u003cli\u003eFunction: Removes contaminants from engine intake air\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat part number is this filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is the CAT Outer Air Filter Element, PN P633607. Confirm that number against your current element or your machine's service documentation before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is listed as a direct replacement for Caterpillar machinery. No specific model list is provided, so check the part number on the element you are replacing or in your parts manual to confirm fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe listing describes it as a CAT OEM-specification filter element under part number P633607.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the outer element be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the interval in your machine's maintenance schedule, or sooner if the intake restriction indicator trips, the element is visibly loaded with dust, or it shows damage to the media or seals.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44109242105959,"sku":"9270528","price":54.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-outer-air-filter-element-pn-p633607-filters-134.webp?v=1791485711"},{"product_id":"cat-air-filter-primary-pn-526-3119","title":"CAT Air Filter Primary | PN 526-3119","description":"\u003cp\u003eThis is a CAT primary air filter element, PN 526-3119. It removes dust, dirt, and other contaminants from the engine's intake air before it reaches critical engine components.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart type: Primary air filter element\u003c\/li\u003e\n\u003cli\u003eBrand: CAT\u003c\/li\u003e\n\u003cli\u003eOEM part number: 526-3119\u003c\/li\u003e\n\u003cli\u003eSKU: 13280706\u003c\/li\u003e\n\u003cli\u003eFunction: Filters dust, dirt, and contaminants from engine intake air\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does this filter fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is listed for CAT equipment that takes primary air filter PN 526-3119. Check the part number on your current element or in your machine's parts book to confirm before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat part number does this replace?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a direct replacement for CAT PN 526-3119.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I know the primary air filter needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it at the service interval in your machine's maintenance schedule, or sooner if the air filter restriction indicator trips. Other signs are loss of power, heavy black exhaust smoke, or a visibly clogged or damaged element.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44231219708007,"sku":"13280706","price":79.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-air-filter-primary-pn-526-3119-filters-736.webp?v=1791482475"},{"product_id":"cat-air-filter-secondary-pn-526-3123","title":"CAT Air Filter Secondary | PN 526-3123","description":"\u003cp\u003eThis is a CAT secondary air filter, part number 526-3123. The secondary element sits inside the primary filter in the air cleaner housing and acts as a backup, catching dirt that gets past the primary so it doesn't reach the engine intake. It is a genuine Caterpillar part and a direct replacement for compatible CAT machinery.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CAT (Caterpillar)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Secondary air filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e 526-3123\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStore SKU:\u003c\/strong\u003e 13280710\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This is a genuine Caterpillar secondary air filter, CAT part number 526-3123.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt fits CAT machines that call for part number 526-3123 as the secondary air filter. To confirm fitment, match 526-3123 against your parts book or the number on the filter you're replacing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the secondary filter do compared to the primary?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe primary filter handles most of the dirt load. The secondary is a backup that protects the engine if the primary gets damaged or while the primary is out for service. Keeping the secondary in good shape matters because it is the last filter before the intake.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the secondary be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace it if you see dirt on the clean side, find damage to the media or seal, or notice the primary has failed. Follow the service interval in your machine's maintenance manual.\u003c\/p\u003e","brand":"RTL Equipment Parts Store","offers":[{"title":"Default Title","offer_id":44231227539559,"sku":"13280710","price":59.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5544\/5607\/files\/cat-air-filter-secondary-pn-526-3123-filters-601.webp?v=1791482479"}],"url":"https:\/\/parts.rtlequipment.com\/collections\/cat-filters.oembed","provider":"RTL Equipment Parts Store","version":"1.0","type":"link"}