1. Discharge the fuel from the fuel filter

2. Use special pinchers to remove the fuel filter warning switch and O-ring

3. Install a new O-ring on the fuel filter warning switch

4. Apply fuel to the O-shape of the fuel filter warning switch

5. Fill fuel with a pneumatic pump and check if leakage

6. Apply fuel to the gasket of the new fuel filter

7. Install the fuel filter by hand on the fuel filter bracket

8. Install the fuel filter warning switch by hand on the fuel filter