Disassembly and assembly of the oil pump (Mercedes-Benz S-Class W140)

Disassembly

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



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

3. Replace the sealing ring (25).



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

Assembly

Assembly is carried out in the reverse order of disassembly.