MTU 16V4000M*3 series Operating Instructions Manual page 188

Replacing fuel filter with the engine running
1. Cut out the filter to be replaced (2) using three-way cock (3):
B Left-hand filter switched off
C Right-hand filter switched off
2. Remove the cut-out oil filter (2) using an oil filter wrench.
3. Clean sealing surface on filter head.
4. Check sealing ring of new filter (2) and coat with fuel.
5. Screw on filter (2) and tighten manually.
6. Turn three-way cock (3) into position (A) where both filters are operational.
7. Replace other fuel filters in the same way.
186 | Fuel Filter | MS15035/00E 2018-08