SKP SK89101 Accessory Drive Belt Idler Pulley

Accessory Drive Idler Pulley Overview

The SKP SK89101 accessory drive belt idler pulley is a direct replacement for a wide range of heavy-duty truck and bus applications. It helps maintain proper belt routing and tension so engine-driven accessories can operate smoothly.

Compatible With Freightliner, International, and Peterbilt applications, this idler pulley is built for service in accessory drive systems where belt stability matters. The SK89101 part number is a useful reference when matching the correct pulley for the application.

• Accessory drive belt idler pulley for belt routing and tension control
• Durable construction for wear resistance in demanding service
• 74mm x 39.5mm notes listed across confirmed applications
• Fits multiple positions including air conditioning, fan, alternator, and water pump drive systems
• Cross-references Dayco 89101 and Febi-Bilstein 36091 for the same application

Fitment Details

This pulley is confirmed for a broad range of commercial vehicles, including Fits 2002-2009 International 5500i, air conditioning; Fits 2004-2008 Kenworth W900, smooth pulley; and Fits 2004-2007 Freightliner Columbia, smooth pulley. It also appears in applications for Peterbilt 379, Freightliner FLD120, and International 9400i SBA. The SK89101 part number should be matched to the exact belt system configuration shown in the fitment data.

Common Problems It Can Address

• Belt noise caused by a worn pulley surface
• Uneven belt tracking in accessory drive systems
• Loss of proper belt tension from pulley wear
• Accessory drive vibration related to pulley condition
• Premature belt wear from a damaged idler pulley

Installation Notes

Verify pulley diameter, width, and belt system configuration before installation. Confirm the listed position and notes for the vehicle, since this part is used in multiple accessory drive layouts across Freightliner, International, and Peterbilt models. Match the SK89101 part number to the original application data before service.

Quality Assurance

SKP describes this pulley as a durable replacement built to resist wear in accessory drive service. The SK89101 is intended for long-term operation in heavy-duty belt systems where consistent tension and alignment are required.