Hayden 5050 Accessory Drive Belt Tensioner Pulley

Hayden 5050 Accessory Drive Belt Tensioner Pulley

The Hayden 5050 is an accessory drive belt tensioner pulley built for smooth belt tracking and reliable operation in the accessory drive system. It is a plastic idler/tensioner pulley with a 3.125-inch outside diameter and a smooth groove surface for back idler belt routing.

Compatible with select Mercedes-Benz applications, including 1990-1992 Mercedes-Benz 500SL and 1992 Mercedes-Benz 400E, 400SE, 500E, and 500SEL. The Hayden 5050 is an OE-style replacement for vehicles that use a smooth back idler pulley in the belt drive system.

Key Features

• Accessory drive belt tensioner pulley / idler pulley design
• Plastic pulley construction
• Smooth groove surface for back idler use
• 3.125 in. outside diameter for proper belt routing
• 1.250 in. belt width specification
• 8 mm inside diameter / .32 in. bore diameter
• Single mounting hole design
• Meets or exceeds OEM requirements

Detailed Description

Hayden Pulley 5050 is engineered as an idler/tensioner pulley for accessory drive belt systems that require a smooth back idler pulley. With a 79.375 mm outside diameter, 26.9 mm pulley width, and 31.75 mm belt width specification, it is sized for proper belt alignment and stable rotation in the drive path. This part cross-references Gates 38084 for the same application.

Fits 1992 Mercedes-Benz 400E, N/A; Fits 1992 Mercedes-Benz 400SE, N/A; Fits 1992 Mercedes-Benz 500E, N/A; Fits 1992 Mercedes-Benz 500SEL, N/A; Fits 1990-1992 Mercedes-Benz 500SL, N/A. For Mercedes-Benz 400E, 400SE, 500E, 500SEL, and 500SL applications, confirm pulley style and dimensions against the original component before installation.

What This Part Helps Address

• Belt noise caused by a worn or rough idler pulley
• Improper belt tracking from pulley wear
• Accessory drive vibration related to pulley surface damage
• Visible cracking or deterioration in the original pulley
• Loss of smooth belt rotation in the tensioner path

Installation Notes and Tips

Verify the pulley diameter, width, bore size, and smooth surface style before installation. Inspect the belt, tensioner arm, and mounting point for wear or damage, and replace any worn related components as needed. Mounting hardware is not included.

Quality Assurance

Hayden 5050 meets or exceeds OEM requirements for the listed applications. It is built as a direct-fit replacement pulley for accessory drive belt service on select Mercedes-Benz models.