Gates 90K-38504HD Serpentine Belt Drive Component Kit - Fan and Alternator

Gates FleetRunner Heavy Duty Serpentine Kit

The Gates FleetRunner Heavy Duty Serpentine Kit 90K-38504HD is built for accessory drive service in demanding fleet applications. It combines the belt and tensioner in one service package, helping streamline maintenance on vehicles that need dependable serpentine system performance.

Use this kit when servicing a serpentine belt drive system on compatible Ford F-150 and Ford Super Duty applications. The 90K-38504HD kit is organized around the key wear components in the accessory drive path, making it easier to restore proper belt tracking and tension control.

• Gates Accessory Belt Drive Kit for serpentine system service
• Includes belt and tensioner components listed in the product contents
• Belt part number K080537HD with 54.272 in. outside circumference
• 28 mm belt top width for the specified accessory drive layout
• Tensioner assembly part number 38504
• Heavy-duty FleetRunner line focused on fleet maintenance needs

Product Details

Gates FleetRunner Heavy Duty Serpentine Kits are designed to simplify proper serpentine system maintenance by grouping the primary service parts under one part number. This kit uses belt part number K080537HD, which measures 1379 mm outside circumference and 1.087 in. belt top width, along with tensioner assembly 38504. Gates also notes that some FleetRunner kits incorporate updates based on long-term heavy-duty service experience, addressing issues identified through extensive maintenance histories. For buyers searching for a serpentine belt drive component kit for Ford F-150 or Ford Super Duty service, 90K-38504HD provides a focused replacement solution.

Common Issues This Kit Can Address

• Worn serpentine belt material that can affect accessory drive operation
• Loss of belt tension from a fatigued tensioner assembly
• Belt noise caused by aging belt and tension control components
• Uneven belt tracking in a high-mileage accessory drive system
• Service delays when the belt and tensioner are sourced separately

Installation Notes

Verify belt routing, tensioner alignment, and pulley condition before installation. Inspect the accessory drive pulleys for wear or contamination, and confirm the replacement belt dimensions match the original application. This kit is intended for direct serpentine system service on the listed application family; confirm vehicle-specific fitment before ordering.

Quality Assurance

Gates is a recognized name in accessory drive components, and the FleetRunner line is aimed at heavy-duty maintenance requirements. Part number 90K-38504HD is built around the specified belt and tensioner components for consistent service replacement.