Hayden 5079 Accessory Drive Belt Idler Pulley

Accessory Drive Idler Pulley for Ford Super Duty

The Hayden 5079 accessory drive belt idler pulley is a steel, black-finished replacement pulley for serpentine belt systems. It is built to meet or exceed OEM requirements and is sized for Ford Super Duty applications that use a grooved pulley in the main drive system.

Use the Hayden Pulley line when you need a direct-fit accessory drive belt idler pulley with the correct groove count, bore size, and outside diameter for the application. The Hayden 5079 is a practical OE-style replacement for Ford F-250 Super Duty and Ford F-350 Super Duty trucks in the listed model years.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Steel construction with black finish
• 8-groove pulley design
• Outside diameter: 3.54 in. / 90.0 mm
• Inside diameter: 0.671875 in. / 17 mm
• Pulley width: 1.48 in. / 37.5 mm
• Meets or exceeds OEM specifications
• Single mount hole design

Detailed Description

Hayden 5079 is an idler / tensioner pulley designed for accessory drive belt systems that use a 1.00 in. serpentine belt. Its steel construction and 8-groove profile support proper belt tracking in the front accessory drive, while the 3.54 in. outside diameter and 17 mm bore help match the original pulley dimensions used on select Ford Super Duty trucks. This part cross-references Dayco 89519 for the same application.

Compatible With 2014-2016 Ford F-250 Super Duty, N/A; Dual Alt, Main Drive; Grooved Pulley; Pulley. Compatible With 2014-2016 Ford F-350 Super Duty, N/A; Dual Alt, Main Drive; Grooved Pulley; Pulley. Compatible With 2011-2013 Ford F-250 Super Duty, N/A; Grooved Pulley; Pulley. Compatible With 2011-2013 Ford F-350 Super Duty, N/A; Grooved Pulley; Pulley.

Common Issues This Part May Address

• Worn or noisy accessory drive idler pulley
• Belt misalignment in the serpentine drive system
• Groove wear that affects belt tracking
• Vibration or rough pulley rotation at the front drive
• Replacement need after pulley surface or bearing wear

Installation Notes and Tips

Verify pulley diameter, groove count, bore size, and belt width before installation. Mounting hardware is not included, so reuse or source the correct hardware for the vehicle. Confirm the pulley location and configuration on Ford F-250 Super Duty and Ford F-350 Super Duty models before ordering, especially on 2014-2016 dual alternator main drive applications.

Quality Assurance

The Hayden 5079 is manufactured to meet or exceed OEM requirements for fit and function in the specified applications. The Hayden Pulley line is used for replacement parts that match original belt-drive dimensions and operating requirements.