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Dayco 89477 Accessory Drive Belt Tensioner Assembly - Alternator or Alternator and Air Conditioning
| Brand | Dayco 89477 |
|---|---|
| Position | Alternator and Alternator and Air Conditioning |
| Belt Type | Serpentine |
| Direction | Counter clock wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 86.5 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 39.4 |
| Type | Automatic |
| Fits | — |
Automatic tensioner. Maintains proper belt tension for consistent accessory drive performance.
Serpentine belt type. Built for smooth, efficient operation in the accessory drive system.
Single-pulley design. Simplifies the assembly while keeping the belt aligned and controlled.
Cross-references CARQUEST 38671, Duralast 89477 and Gates 38671 for the same application. See all 7.
Accessory Drive Belt Tensioner Assembly
Dayco 89477 is an automatic serpentine accessory drive belt tensioner assembly built for consistent belt control in the accessory drive system. It uses a single flat pulley with a 86.5 mm diameter and counter clockwise rotation to maintain proper serpentine belt tension and tracking.
Compatible With Volvo applications that use this tensioner design, Dayco 89477 supports stable belt operation in the accessory drive belt system. The Dayco 89477 is a direct-fit style replacement for vehicles requiring an automatic serpentine tensioner with the listed pulley specifications.
Key Features
- Accessory drive belt tensioner assembly for serpentine belt systems
- Automatic tensioner design for steady belt load control
- Counter clockwise rotation
- Single pulley design with flat pulley profile
- Pulley diameter: 86.5 mm
- Pulley width: 39.4 mm
- Dayco 89477 part number for catalog matching and search
Detailed Description
This Dayco accessory drive belt tensioner assembly is specified for serpentine belt applications that require automatic tension management and counter clockwise operation. The pulley design, width, and flat profile are important for maintaining correct belt alignment and smooth accessory drive performance. For Volvo owners searching for a replacement tensioner assembly, Dayco 89477 provides the listed dimensions and rotation direction needed for the correct application.
This part cross-references CARQUEST 38671 and Gates 38671 for the same application. Search terms such as Volvo accessory drive belt tensioner assembly, serpentine belt tensioner replacement, and Dayco 89477 tensioner assembly help identify the correct part for the vehicle platform.
What It Helps Address
- Serpentine belt noise caused by weak or inconsistent tension
- Belt flutter or vibration in the accessory drive system
- Improper belt tracking from a worn pulley or tensioner
- Loss of belt tension that affects accessory operation
- Wear related to an aging automatic belt tensioner assembly
Installation Notes and Tips
Verify pulley diameter, width, rotation direction, and belt type before installation. Match the counter clockwise tensioner orientation to the original Volvo accessory drive layout, and inspect the serpentine belt, idler pulleys, and related drive components at the same time. Confirm the mounting points and belt routing against the vehicle service information before final assembly.
Quality Assurance
Dayco is a recognized supplier in belt drive and cooling system components, and this tensioner assembly is built to meet the dimensional and functional requirements listed for the application. Use the part number 89477 to confirm catalog accuracy when ordering replacement components.
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