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Dayco 89475 Accessory Drive Belt Tensioner Assembly - Air Conditioning, Alternator or Main Drive
| Brand | Dayco 89475 |
|---|---|
| Position | Air Conditioning, Main Drive, and Alternator |
| Belt Type | Serpentine |
| Direction | Counter clock wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 74 |
| Pulley 1 Flat | N |
| Pulley 1 Number of Grooves | 8 |
| Pulley 1 Width | 34 |
| Type | Automatic |
| Fits | — |
Automatic tensioning. Keeps serpentine belt tension consistent for reliable accessory drive performance.
Serpentine belt system part. Built for accessory drive belt applications.
Single-pulley design. Uses one pulley for a compact, straightforward assembly.
Cross-references Cummins 3973820, Cummins 3974102 and Cummins 5258155 for the same application. See all 4.
Dayco 89475 Accessory Drive Belt Tensioner Assembly
The Dayco 89475 accessory drive belt tensioner assembly is an automatic serpentine belt tensioner built for accessory drive belt system service. It uses a single 74 mm pulley with 8 grooves and counter clockwise rotation to maintain proper belt tension in the drive system.
Key Features
- Automatic accessory drive belt tensioner assembly
- Serpentine belt application
- Counter clockwise rotation
- Single pulley design with 74 mm pulley diameter
- 8-groove pulley for serpentine belt routing
- 34 mm pulley width for belt contact support
- Dayco 89475 replacement part number
Detailed Description
Built for accessory drive belt system repair, the Dayco 89475 helps maintain consistent serpentine belt tension in applications that require an automatic tensioner with counter clockwise operation. The pulley specification includes a 74 mm diameter, 8 grooves, and 34 mm width, which are important details when matching the correct belt drive component. This part cross-references Cummins (e.g., 3973820, 3974102) for the same application. For buyers searching for Dayco 89475, serpentine belt tensioner assembly, or accessory drive belt tensioner assembly for Cummins applications, these specifications help confirm the correct replacement.
What It Helps Address
- Belt slack in the accessory drive system
- Improper serpentine belt tension
- Belt noise caused by worn tensioner components
- Uneven belt tracking across the pulley path
- Drive belt service needs on Cummins-equipped vehicles
Installation Notes and Tips
Verify pulley diameter, groove count, belt type, and rotation direction before installation. Match the automatic tensioner layout and confirm the accessory drive routing against the original component. For fitment-based searches, this part is commonly referenced for Cummins accessory drive belt tensioner assembly applications and Dayco 89475 replacement needs. If the original tensioner shows bearing wear, weak spring action, or pulley damage, replace the assembly after confirming the belt path and alignment.
Quality Assurance
Dayco manufactures belt drive components for accessory drive system service, and this tensioner assembly is specified with the key dimensions and rotation details needed for accurate replacement selection.
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