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Faults
32 EN
04/2019
Fault
: Pump leaks
Possible cause
Solution
Screw connection or seal
faulty.
Renew seal between volute
casing and housing lid.
Tighten screw connections.
Fault
: Shaft seal leaks too much
Possible cause
Solution
Mechanical seal is worn
or damaged.
Replace
mechanical
seal.
Damage during
disassembly.
Replace
mechanical
seal.
Pump is loud.
Improve suction conditions.
Adjust pump unit.
Increase the pressure on the
suction discharge.
Pump strained or
vibrations in the pipes.
Check pipe connections and
pump fasteners, if necessary
reduce the pipe bracket
spacing.
Fasten pipes using vibration
reducing materials.
Pump shaft slipped.
Fix pump shaft. See point 8.5.5
on page 40