{"product_id":"unn60-0020-idler-shaft","title":"4K9984  Idler Shaft Fits CAT Fits Caterpillar Industrial Construction D4D","description":"\u003ch3\u003eOne New Aftermarket Replacement Idler Shaft Fits Caterpillar (Fits CAT) D4D Track-Type Tractor\u003c\/h3\u003e\u003cp\u003eThis aftermarket replacement front idler shaft is Fits Caterpillar (Fits CAT) D4D track-type tractor (dozer). The idler shaft is a critical undercarriage component that supports the front idler assembly, maintaining proper track tension and guiding the track chain for stable, efficient operation. Replaces OEM Fits Caterpillar part number 4K9984 (also referenced as 4K-9984).\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWeight: approximately 11.5 lbs.\u003c\/li\u003e\n\u003cli\u003eAssembly position: Front idler\u003c\/li\u003e\n\u003cli\u003eUndercarriage system component\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatible Models\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eFits Caterpillar (Fits CAT) Track-Type Tractors:\u003c\/strong\u003e D4D\u003c\/p\u003e\u003ch4\u003eReplaces Part Number(s):\u003c\/h4\u003e\u003cp\u003e4K9984, 4K9984-A, UNN60-0020, CR2047\u003c\/p\u003e\u003cp\u003eNew aftermarket replacement part - not remanufactured, not used.\u003c\/p\u003e","brand":"Reliable Aftermarket Parts, Inc® -OD","offers":[{"title":"Default Title","offer_id":17725365518387,"sku":"UNN60-0020","price":133.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/4060\/3955\/files\/UNN60-0020_01.jpg?v=1758086648","url":"https:\/\/www.reliableaftermarketparts.com\/products\/unn60-0020-idler-shaft","provider":"Reliable Aftermarket Parts, Inc®","version":"1.0","type":"link"}