1. Removing fuel filter assembly

2. Removing the middle part of the bolt and the lower part of the fuel filter

3. Remove the gasket from the upper part of the fuel filter

4. Remove the 2 spacers, filter element, spring and spring from the lower body of the fuel filter

5. Remove the O ring from the middle bolt

6. Clean the lower part of the fuel filter and the middle bolt

7. Take out a new fuel filter o - ring, gasket, and filter element, in accordance with the reverse sequence from step 1 to step 5. Ensure that the O ring and gasket are coated with oil.
8. Through operate pneumatic pump, let the air out from the fuel filter.

9.  Fire the engine and check filter whether there is oil leakage