- Remove the circlip (1) on the rotor shaft;
- Unscrew and remove the two screws (A) with washer;
- Release the rotor (2) with the seal ring from the outside;
- Using a punch on the rotor side, drive out the end bearing (3) from the cover;
- Release the spacer (4) and remove the other bearing (5) in the same way;
- Operating on the inside of the cover, remove the counterface (6) of the seal ring;
- Remove the inner spacer (8).
Check the condition of the mechanical seal components: there must not be any deformation, cracks or excessive wear. If there is excessive damage, change both components.
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Reassembly
Clean the casing seat, the components to be refitted and the rotor shaft thoroughly and lubricate them with engine oil. Then refit them as follows:
Using pad code number 88713.0869, fit the new seal ring (7) on the rotor shaft;
Working on the inside of the cover, fit the inner spacer (8) with the sharp edge facing outwards;
Using a pad on the outer ring, bring the bearing (5) to the end of the spacer (8), with the shielded side facing the casing;
Fit the spacer (4) and the other bearing (3), bringing them to the end;
Fit the two screws (A) with washer, tightening them at the specified torque;
Turn over the casing and use pad code number 88713.0870 to fit the counterface (6), positioned as in the diagram, as far as the end of the spacer (8);
insert the rotor shaft (2) with seal ring and secure it on the opposite side with the circlip (1).
Turn the rotor and check that it rotates freely, without jamming.