MSW Motor Technics MSW-M-WPP-4.3LPM Manual De Instrucciones página 23

Low flow and
pressure.
Abnormal running
noise.
Air leak on the suction side.
Dirt accumulated inside of
the pump or in the
hydraulic system.
The pump bearing is worn
(this can be evident by loud
noise).
The pump diaphragm is
broken.
The motor has failed.
The installation substrate is
flexible.
Loose heads/bolts.
The pump is plumbed to a
rigid pipe.
Inspect the sealing of the
couplings to pinpoint air
leaks.
Clean the hydraulic system.
Contact the manufacturer's
service.
If it is, it can be the source of
the noise.
Inspect for loose
heads/bolts.
If it is so, the pipe carries
noise easier.