Symptoms
Gravel-like noise, vibration, insufficient flow.
Probable causes
- Insufficient NPSH
- Clogged suction strainer
- Damaged impeller
- Air in the suction line
Solution
Check the suction head and suction line, clean the strainer, inspect the impeller and seals, and bleed the air from the circuit.
The information on this page is general guidance. It does not replace the manufacturer’s manual or the work of a qualified technician: before any intervention, always check procedures, tightening torques and safety requirements in the official documentation of the machine.
Field experiences
No experience has been published for this fault yet. If you have dealt with it, tell us how you solved it: photos and drawings help whoever faces the same situation.
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