{"product_id":"dayco-89955-accessory-drive-belt-tensioner-assembly-alternator","title":"Dayco 89955 Accessory Drive Belt Tensioner Assembly - Alternator","description":"\u003ch2\u003eAccessory Drive Belt Tensioner Overview\u003c\/h2\u003e\u003cp\u003eDayco 89955 is an accessory drive belt tensioner assembly for alternator applications on heavy-duty trucks. It is a direct-fit replacement for select Peterbilt and Kenworth models, with fitment covering multiple model years and configurations.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAccessory drive belt tensioner assembly for alternator drive systems\u003c\/li\u003e\n\u003cli\u003eDirect-fit replacement for select heavy-duty truck applications\u003c\/li\u003e\n\u003cli\u003eFits Peterbilt 579, 365, 367, 389, 567, 587, 384, 386, and 388 applications\u003c\/li\u003e\n\u003cli\u003eFits Kenworth T660, T680, T700, T800, T880, and W900 applications\u003c\/li\u003e\n\u003cli\u003eDayco part number 89955 for catalog and service reference\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDayco 89955 is built for alternator belt tensioning in accessory drive systems used on select Peterbilt and Kenworth trucks. This tensioner assembly supports proper belt tension control for vehicles such as the Peterbilt 579 and Kenworth T680, helping maintain consistent accessory drive operation across the listed fitments. Use Dayco 89955 when replacing a worn or incorrect alternator belt tensioner assembly on compatible heavy-duty truck applications.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCorrecting belt slack in the alternator drive system\u003c\/li\u003e\n\u003cli\u003eReplacing a tensioner with weak or inconsistent belt control\u003c\/li\u003e\n\u003cli\u003eAddressing belt noise related to tension loss\u003c\/li\u003e\n\u003cli\u003eRestoring stable accessory drive performance\u003c\/li\u003e\n\u003cli\u003eReplacing a damaged or worn Dayco 89955 assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle year, model, and alternator application before ordering. Match the existing belt routing and tensioner configuration to the listed fitment for Peterbilt and Kenworth trucks. Inspect the belt and related pulleys during service, and replace any worn components as needed to maintain proper drive system operation.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":53519190884533,"sku":"BCWL-89955","price":86.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_89955_FRO.jpg?v=1791956320","url":"https:\/\/www.partcatalog.com\/products\/dayco-89955-accessory-drive-belt-tensioner-assembly-alternator","provider":"PartCatalog","version":"1.0","type":"link"}