Hayden 5989 Accessory Drive Belt Idler Pulley

Overview of Hayden Pulley Accessory Drive Belt Idler Pulley

The Hayden Pulley 5989 is a durable accessory drive belt idler pulley designed for select Mercedes-Benz models. Engineered to meet or exceed OEM specifications, this black plastic pulley ensures reliable serpentine belt tension and smooth operation in your vehicle's accessory drive system.

• Material: High-quality black plastic construction
• Outside Diameter: 3.1875 inches (80.963 mm)
• Inside Diameter (Bore): 0.375 inches (9.525 mm)
• Width: 1 inch (25.4 mm)
• Belt Type Compatibility: Serpentine belts with 1 inch (25.4 mm) width
• Groove Quantity: Smooth surface for optimal belt contact
• Mount Hole Quantity: Single mounting hole (hardware not included)
• Meets or exceeds OEM standards for fit and function

Detailed Product Description

This Hayden Pulley 5989 idler pulley is specifically designed as a back idler for accessory drive belt systems. Its smooth groove surface and precise dimensions support serpentine belts, maintaining proper tension and alignment. The plastic material offers a balance of strength and lightweight performance, suitable for the demands of Mercedes-Benz vehicles such as the 190E, 300D, 300SDL, 300TD, 350SD, 350SDL, E300, and SL500.

The pulley’s 0.375 inch inside diameter and 3.1875 inch outside diameter ensure compatibility with the specified belt widths and mounting configurations. This part is engineered to provide consistent belt routing and tension, reducing wear on belts and other drive components.

About the Hayden Pulley Product Line

The Hayden Pulley line focuses on accessory drive belt system components, offering reliable idler and tensioner pulleys designed to meet OEM requirements. The Pulley product line emphasizes precise fitment and durable materials, making it a suitable replacement option for maintaining proper belt tension and accessory drive performance in various vehicle applications.

Common Applications and Issues Addressed

• Replacement for worn or damaged idler pulleys in Mercedes-Benz 190E and 300 series models
• Resolves belt slippage or misalignment caused by pulley wear
• Eliminates noise or squealing from failing accessory drive components
• Prevents premature serpentine belt wear due to improper tension
• Supports smooth operation of engine accessories such as alternator and power steering pump

Installation Notes and Tips

• Verify compatibility with your specific Mercedes-Benz model before installation
• Ensure the mounting hole aligns correctly; mounting hardware is not included and must be sourced separately
• Inspect serpentine belt condition and replace if necessary during pulley installation
• Use proper torque specifications to avoid damage to the pulley or mounting bracket
• Check belt routing diagrams to confirm correct installation

Quality Assurance and Warranty

The Hayden Pulley 5989 meets or exceeds OEM standards for fit, form, and function, ensuring reliable performance in your Mercedes-Benz vehicle. While specific warranty details are not provided, Hayden products typically adhere to industry quality controls to support long-term durability and customer satisfaction.