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- 4. Tighten the spark plug caps using the correct torque wrench.
- Proper installation of oil seals is crucial to ensure their effectiveness and longevity. The seal must be placed in the correct position, with the lip facing the fluid it is intended to contain. Care must also be taken to avoid damaging the seal during installation, as even a small tear or deformation can compromise its performance.
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Oil seals work by squeezing and retaining lubricant in a thin layer between the lip and the shaft. Perfect sealing is ensured by the hydrodynamic action of the rotating shaft, which in turn produces a slight pump action.
3. Dust and debris are common reasons for oil seal failure.

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Aluminum alloys and resin (materials with a large difference between the linear expansion coefficients) demand sufficient consideration (as there is a risk of failure due to the increased clearance with the oil seal at high temperatures).


7. Selecting high-quality oil seals

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