{"product_id":"dayco-89657-accessory-drive-belt-tensioner-assembly","title":"Dayco 89657 Accessory Drive Belt Tensioner Assembly - Main Drive","description":"\u003ch2\u003eOverview of Dayco Accessory Drive Belt Tensioner Assembly 89657\u003c\/h2\u003e\u003cp\u003eThe Dayco 89657 accessory drive belt tensioner assembly is designed for reliable performance in Ford F-250 Super Duty and F-350 Super Duty trucks. This automatic tensioner supports serpentine belt systems, ensuring proper belt tension and smooth operation of engine accessories.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Ford F-250 Super Duty and F-350 Super Duty models\u003c\/li\u003e\n\u003cli\u003eAutomatic tensioner type for consistent belt tension\u003c\/li\u003e\n\u003cli\u003eCounter clockwise direction operation\u003c\/li\u003e\n\u003cli\u003eSingle pulley design with a 90 mm diameter\u003c\/li\u003e\n\u003cli\u003ePulley width of 39 mm with a flat surface\u003c\/li\u003e\n\u003cli\u003eDesigned for serpentine belt systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dayco 89657 tensioner assembly features a single pulley with a 90 mm diameter and a 39 mm width, optimized for serpentine belt applications. The pulley surface is flat, which helps maintain proper belt alignment and reduces wear. This automatic tensioner operates in a counter clockwise direction, providing consistent tension to the accessory drive belt system. The design supports the demanding requirements of Ford F-250 Super Duty and F-350 Super Duty trucks, ensuring reliable accessory drive performance under various driving conditions.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cp\u003eThis accessory drive belt tensioner assembly is used to maintain proper tension on the serpentine belt, which drives multiple engine accessories such as the alternator, power steering pump, and air conditioning compressor. It addresses common issues including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcessive belt slack causing slipping or noise\u003c\/li\u003e\n\u003cli\u003ePremature belt wear due to improper tension\u003c\/li\u003e\n\u003cli\u003eAccessory drive system misalignment\u003c\/li\u003e\n\u003cli\u003eVibration and belt flutter at high engine speeds\u003c\/li\u003e\n\u003cli\u003eFailure of manual tensioners leading to inconsistent belt tension\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dayco 89657 tensioner assembly on Ford F-250 Super Duty or F-350 Super Duty models, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. The tensioner should be installed with the pulley rotating counter clockwise as specified. Verify that the pulley surface is clean and free of debris before installation. Use appropriate tools to relieve tension safely and avoid damage to the tensioner or belt. After installation, inspect belt alignment and tension to confirm proper operation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the 89657 accessory drive belt tensioner assembly to meet or exceed OEM specifications for durability and performance. The automatic tensioner design ensures consistent belt tension over the service life of the component. While specific warranty details may vary, Dayco products typically come with a limited warranty covering defects in materials and workmanship. Refer to Dayco’s official warranty documentation for complete terms.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391610421429,"sku":"BCWL-89657","price":97.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_89657_Fro.jpg?v=1774728952","url":"https:\/\/www.partcatalog.com\/products\/dayco-89657-accessory-drive-belt-tensioner-assembly","provider":"PartCatalog","version":"1.0","type":"link"}