Disassembly and assembly of the oil pump (Mercedes-Benz S-Class W220)

Disassembly

1. Remove pump gears 22 and 23 from the pump housing.



2. Check radial oil seal 24 and replace it if necessary.

3. Replace sealing ring 25.

4. Lubricate the pump gears and install the pump into the pump body. Insert pump gear 22 with the chamfer (arrow) toward the pump body.

Assembly

Assembly is carried out in the reverse order of disassembly.