Piusi MA 130 Instrucciones De Uso Y Mantenimiento página 68

Balls do not close
properly.
Insufficient air flow.
Disassemble the mani-
folds and clean the seats
or both the balls and the
ball seats.
Check pressure using
pressure gauge installed
on thepump when it is
running: see page 56. if
the pressureat that point
is too low in relation
to network pressure,
checkall the air fittings,
especially snap-on ones.
Check if all aircontrol
devices have a sufficient
flow rate. WARNING:
in90% of cases, stall oc-
currences are caused by
snap-onfittings.
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