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Problem
Cause
Remedy
Pump does not
reach the
specified pressures
Pump sucking air
Restore the tightness of the
intake line
Intake flow rate insufficient
Increase the size of the intake
pipelines
Remove any kinks from the pipes
Increase the filter capacity or
clean the filter cartridge
Increase the rpm to the rated
speed
Worn intake and delivery valves
Replace the valves (1)
By-pass valve seat worn
Replace the valve
Worn gaskets
Replace the gaskets(1)
Unsuitable, worn nozzle
Replace nozzle
lrregular variations
in pressure
Worn intake and delivery valves
Replace the valves (1)
Valves blocked by dirt
Clean the valves(1)
Air being sucked into system
Restore the tightness of the intake
pipeline connections
Worn gaskets
Replace the gaskets(1)
Vibrations on pipes
Valves jammed
Replace the valves(1)
By-pass valve malfunction
Replace the by-pass valve
By-pass valve dump line too small
Increase size of by-pass valve
dump line
Pressure damper flat
Restore pressure damper to
correct inflation pressure
Pump sucking air
Restore the tightness of the
intake line
Pressure drop
Nozzle worn
Replace nozzle
Worn intake and/or delivery valves
Replace the valves(1)
Valves blocked by dirt
Clean the valves(1)
By-pass valve seat worn
Replace the valve
Worn gaskets
Replace the gaskets (1)
(1) Operations that must be carried out at an authorized service centre
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