1. Wipe clean the inner and outer tube walls

1. Wipe clean the inner and outer tube walls

2. Apply lubricant after installing the rubber ring

2. Apply lubricant after installing the rubber ring

3. Keep the two tubes coaxial and insert them until they reach the installation mark.

3. Keep the two tubes coaxial and insert them until they reach the installation mark.

4. Installation check: Ensure the rubber ring is properly positioned and hasn’t shifted.

4. Installation check: Ensure the rubber ring is properly positioned and hasn’t shifted.

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