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Dayco 89480 Accessory Drive Belt Tensioner Assembly
| Brand | Dayco 89480 |
|---|---|
| Position | Alternator, Fan and Alternator, Fan, Alternator and Hub, Fan, Air Conditioning, Main Drive, Fan and Air Conditioning, and Fan, Alternator and Air Conditioning |
| Belt Type | Serpentine |
| Direction | Clock wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 74 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 39.25 |
| Type | Automatic |
| Fits | — |
Automatic tensioner assembly. Maintains proper serpentine belt tension for consistent drive performance.
Single-pulley design. Uses one pulley for a simpler, compact belt drive setup.
Clockwise rotation. Built for the specified belt travel direction.
Cross-references ACDelco 38506, CARQUEST 38506 and Cummins 4071248 for the same application. See all 16.
Dayco 89480 Accessory Drive Belt Tensioner Assembly
Dayco 89480 is an automatic accessory drive belt tensioner assembly for serpentine belt systems. It uses a single 74 mm pulley with a flat pulley surface and clockwise rotation to maintain proper belt tension and help keep the drive system operating smoothly.
Key Features
- Automatic accessory drive belt tensioner assembly
- Serpentine belt application
- Clockwise rotation
- Single pulley design
- 74 mm pulley diameter with 39.25 mm width
- Flat pulley profile for belt tracking
Product Details
This Dayco accessory drive belt tensioner assembly is built for vehicles that use an automatic serpentine belt tensioner to manage belt load and alignment. The 74 mm pulley and flat running surface support consistent belt contact, while the clockwise direction specification is important for correct operation in the intended application. Dayco 89480 is a direct-fit style replacement for select heavy-duty and industrial vehicle applications, including John Deere and Cummins platforms where this part number is referenced.
This part cross-references Gates 38506 for the same application.
What It Helps Address
- Belt slack that can lead to squeal or slip
- Uneven belt tracking across the accessory drive system
- Loss of proper serpentine belt tension
- Noise from a worn or weak tensioner assembly
- Accessory drive performance issues tied to belt misalignment
Installation Notes and Tips
Verify pulley diameter, width, rotation direction, and belt type before installation. Confirm the clockwise tensioner orientation matches the original unit and inspect the serpentine belt, idler pulleys, and related accessory drive components for wear at the same time. For vehicle-specific searches, this Dayco 89480 tensioner is commonly referenced in John Deere and Cummins applications.
Quality Assurance
Dayco is a recognized name in accessory drive belt system components, and this tensioner assembly is specified with the pulley and rotation details needed for accurate replacement selection. Confirm part number 89480 against the original unit and application data before ordering.
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