Hayden 5028 Accessory Drive Belt Idler Pulley

Hayden 5028 Accessory Drive Belt Idler Pulley

The Hayden 5028 accessory drive belt idler pulley is a steel V-belt pulley built for Mercedes-Benz accessory drive systems that use a 0.500-inch belt width. With a 3.750-inch outside diameter, 0.625-inch bore, and single-groove design, it supports proper belt routing and tension control in the accessory drive belt system.

Key Features

• Steel construction with a black finish
• Idler / tensioner pulley style for V-belt applications
• 0.625-inch inside diameter and 3.750-inch outside diameter
• Single-groove pulley for 0.500-inch belt width
• Meets or exceeds OEM requirements
• Mounting hardware not included

Product Details

Hayden Pulley 5028 is an accessory drive belt idler pulley designed for vehicles that require a durable steel pulley with precise belt tracking. The 12.7 mm pulley width, 95.250 mm outside diameter, and 15.875 mm bore dimensions support consistent alignment in V-belt accessory drive systems. This part cross-references Four Seasons 45028 for the same application. It is a direct-fit style replacement for select Mercedes-Benz models, including 2001 Mercedes-Benz C320 and 1985-1991 Mercedes-Benz 380SE, 380SL, 420SEL, 500SEC, 500SEL, 560SEC, 560SEL, and 560SL applications. Hayden 5028 is also listed for Mercedes-Benz accessory drive belt pulley service where OE-style fit and function are required.

Common Problems This Pulley Can Address

• Belt noise caused by a worn or rough idler pulley
• Improper belt tracking from pulley wear or groove damage
• Accessory drive belt vibration from pulley wobble
• Reduced belt contact due to pulley surface wear
• Service replacement for a damaged Mercedes-Benz accessory drive pulley

Installation Notes and Tips

Verify belt width, bore diameter, and pulley offset before installation. Inspect the accessory drive belt, tensioner components, and mounting point for wear before replacing the pulley. Mounting hardware is not included, so reuse or source the correct hardware as needed. Confirm fitment against the vehicle’s accessory drive layout for the specific Mercedes-Benz C320, 380SE, 380SL, 420SEL, 500SEC, 500SEL, 560SEC, 560SEL, or 560SL application.

Quality Assurance

Hayden 5028 is engineered to meet or exceed OEM specifications for accessory drive belt service. The steel pulley construction supports dependable operation in demanding belt-drive applications.