For clarity, the figures show the engine removed from the frame.
Loosen and remove screws (1), (2) and (16) with the relevant washer securing the water pump cover (3) to the generator cover
(4).
Remove the water pump cover (3) and collect dowels (5).
Clean the pump housing from any coolant scale. Check the bearing wear by turning the impeller shaft (6); in case of excessive
clearance, it is necessary to replace them as follows.
Remove the snap ring (7) from the impeller shaft, and the washer (8) underneath.
Slide off the impeller (6) with the sealing ring (9) from the outside.
Collect the ceramic washer and the seal ring union (14).
Undo and remove the screws (10) with the washer (11).
Working from the impeller side, use a suitable drift to press on the inner ring of end bearing (12) until it can be extracted
from the cover.
Use the same technique to remove the other bearing (13).
Remove the inner spacer (15).
Check the condition of the mechanical seal components (9) and of the counter-washer (14): there should be no signs of deformation,
cracking, or excessive wear.
In case of damage, both components must be replaced.