Dayco 89476 Accessory Drive Belt Tensioner Assembly - Air Brake Compressor, Air Compressor or Air Conditioning

Overview

Dayco 89476 is an automatic accessory drive belt tensioner assembly for serpentine belt systems. It is built for commercial-duty applications that require consistent belt tension and stable pulley tracking across air conditioning and compressor drives.

Compatible With International TerraStar, 4300, 4300LP, 4100, 4200, 4200LP, 4400, and IC Corporation HC Integrated Commercial applications listed below. Part number 89476 is also cross-referenced to common aftermarket and OE-equivalent numbers for the same application.

Key Features

• Automatic tensioner design for serpentine accessory drive systems
• Single 78 mm pulley with 6 grooves for belt engagement
• Clockwise rotation for application-specific belt routing
• 30 mm pulley width for proper belt contact
• Fits air conditioning, air compressor, and air brake compressor applications

Detailed Description

This Dayco accessory drive belt tensioner assembly is engineered for vehicles that rely on a serpentine belt to drive critical accessories. The automatic design helps maintain belt tension as operating conditions change, while the grooved pulley supports stable belt tracking in demanding commercial use. Dayco 89476 is a direct-fit service part for the listed International and IC Corporation applications, including International TerraStar and International 4300 platforms.

This part cross-references CARQUEST 38629 and Gates 38629 for the same application. Part number 89476 is also listed under Navistar references 1832711C2 and 1899179C1.

What It Is Used For

• Restoring proper serpentine belt tension
• Reducing belt slip on accessory drive systems
• Addressing pulley noise from worn tensioner components
• Supporting stable accessory operation in compressor-driven systems

Installation Notes and Tips

Verify belt routing, pulley alignment, and rotation direction before installation. Confirm the application by year, model, and accessory position, since this part is used across multiple International and IC Corporation configurations. Inspect the serpentine belt and related pulleys for wear during service to avoid repeat failures.

Quality Assurance

Dayco manufactures accessory drive components for commercial vehicle service applications and this tensioner assembly follows the specified pulley diameter, groove count, and automatic tensioning design for the listed fitments.