Dayco 89720 Automatic Belt Tensioner Assembly

The Dayco 89720 is a premium automatic belt tensioner assembly designed to maintain constant, precise tension on serpentine belt drive systems. This tensioner features Dayco's patented flat spring design that provides less operating range variation compared to traditional coil spring tensioners, reducing the risk of premature accessory bearing failure from excessive tension and minimizing belt noise or slippage from insufficient tension.

Key Features:

• Patented flat spring design for consistent tension and longer service life
• PTFE string wound within spring resists abrasion and dampens noise
• Heavy-duty cast aluminum spring case and arm resist cracking and fatigue
• Rust-resistant coated flat spring and zinc-coated mounting bolts
• Thermoplastic rubber spring slot plugs and O-ring seals keep contaminants out
• Single pulley configuration with 70mm diameter
• Counter-clockwise rotation direction

This tensioner assembly replaces OEM part number 119553TS0C and cross-references to Gates 39358. Engineered to meet or exceed OEM specifications, the Dayco 89720 delivers reliable performance and quiet operation under demanding conditions. Each tensioner is manufactured with precision components and quality materials to ensure proper belt tracking and optimal accessory drive system performance.