Water Pump Shaft; Water Pump Rotor; Checking The Water Pump Cover - PIAGGIO 500 cc Service Manual

Flywheel cover

Water pump shaft

- Check that the water pump shaft shows no signs of
wear on the part in contact with the case, in the oil seal
working area, and on the drive.
- Check that the ceramic seal working areas are not
scored or worn.

Water pump rotor

- Check that the rotor is not deformed or cracked.
- Check that the plastic rotor is perfectly integral with
the metal part.

Checking the water pump cover

- Check that the water pump cover is not deformed or
cracked.
- Check the O ring condition.
- Check that the coupling surfaces of the thermostat
cover and the cooling bypass lock slot are not worn or
cracked.
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