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Belt Tensioner
The Belt Tensioner maintains proper tension on the engine drive belt for smooth and reliable accessory operation.
This component uses a spring-loaded or damping mechanism to keep the belt at the correct tightness during engine operation. Its precision pulley and durable bearings ensure stable rotation, reducing belt slip, noise, and wear. Made from high-strength materials, the tensioner withstands constant vibration, heat, and load variations found in heavy-duty diesel engines.
By maintaining consistent belt tension, the tensioner helps ensure proper functioning of the alternator, coolant pump, air compressor, and other belt-driven components. It improves engine efficiency, extends belt life, and prevents failures caused by loose or worn belts, supporting reliable performance in commercial vehicles.
Key Features
- Maintains correct tension on drive belts
- Reduces belt slip, noise, and premature wear
- Durable pulley and high-quality bearings
- Heat-resistant and vibration-proof construction
- Suitable for heavy-duty diesel engines
Product Specifications
| GROUP | MODEL | REF. PART NUMBER | SPECIFICATIONS |
|---|---|---|---|
| 18.021 | 3128, 2523, 2528 | A9062000270 | Belt Tensioner – Heavy-Duty Type |
Process Steps
- Remove old belt tensioner and inspect mounting area
- Install new tensioner securely
- Route the drive belt correctly around all pulleys
- Apply tension and check belt alignment
- Start engine and observe belt movement
- Verify quiet, smooth, and vibration-free operation
FAQ
What does a belt tensioner do?
It maintains proper belt tension to ensure smooth operation of engine-driven accessories.
When should it be replaced?
When there is belt slippage, noise, vibration, or visible pulley/bearing wear.
