SKP SK89474 Accessory Drive Belt Tensioner Assembly - Fan or Alternator and Air Conditioning

Accessory Drive Belt Tensioner Overview

The SKP SK89474 accessory drive belt tensioner assembly is built to maintain proper belt tension for consistent engine accessory operation. It is a direct-fit replacement for a range of medium- and heavy-duty applications, including Ford F-650 and Freightliner M2 106 models.

This tensioner helps support quieter operation and steady belt control in systems that drive the fan, alternator, and air conditioning. The SK89474 part number is also a useful reference when matching the correct replacement for your application.

Key Features

• Accessory drive belt tensioner assembly for engine belt system service
• Built with high-quality materials for dependable replacement use
• Rigorously tested for fit and function
• Supports stable belt tension for accessory drive operation
• Compatible with Ford F-650, Freightliner M2 106, and other listed applications

Detailed Description

The SKP SK89474 is an accessory drive belt tensioner assembly designed for vehicles that rely on a properly tensioned belt to drive critical accessories. By maintaining consistent belt load, it helps reduce belt noise and supports efficient operation of the fan, alternator, and air conditioning system. This part cross-references Dayco 89474 for the same application.

Fitment includes 2002 Sterling Truck L8500, L9500, and LT8500/LT9500; 2007-2011 Freightliner M2 106; 2007-2008 Kenworth T300; 2008-2011 Ford F-650; and 2008-2011 Peterbilt 330. Additional coverage includes Ford F-750, Freightliner MT45 and MT55, Kenworth T170, T270, and T370, Sterling Truck Acterra, Peterbilt 325, 335, and 337, plus Blue Bird All American FE, All American RE, and Vision School Bus applications. The SK89474 part number should be matched against the vehicle listing before installation.

Common Issues This Part May Address

• Belt squeal caused by weak or inconsistent tension
• Accessory drive belt slack or poor tracking
• Noisy operation from a worn tensioner assembly
• Reduced belt control in fan, alternator, and air conditioning drive systems
• Replacement needs for a failed belt tensioner assembly

Installation Notes and Tips

Confirm the year, make, model, and belt-drive configuration before ordering. This application includes both fan, alternator, and air conditioning positions and one N/A listing, so verify the exact vehicle setup against the fitment data. Inspect the belt and related pulleys during service to avoid repeat failures.

Quality Assurance

SKP states that this tensioner assembly is built from high-quality materials and tested for fit and function. The design is intended to support proper belt tension and quieter engine operation in the listed applications.