Edizione 11/03
Codice
7.020.0703
pompe pneumoidrauliche -
pneumohydraulic pumps mod. P820
5
MANUTENZIONE -
MAINTENANCE
Pag. 15
Fault
1) Pump either does not
work, or runs slowly.
2) The pump in its static
pressurised state loses air
continously through the
silencer.
3) Excess oil leakage from
air exhaust silencer.
4) Pump runs without
actually pumping.
5) Pump functions, but with
low pressure in the circuit,
and does not shut off on
reaching maximum
pressure limits.
Cause
1.1) Low pressure in the
compressed air supply pipe.
1.2) Formation of ice on the
discharge.
1.3) Accumulation of
deposits in the muffler n.64.
1.4) Blocked air filter
(Pos.A - fig. 01).
2.1) Worn seal n.20.
3.1) Worn hydraulic seal
ring n.23.
4.1) Blocked oil-intake filter
n.44.
4.2) Lack of complete seal
at the intake union n.38.
5.1) Lack of satisfactory
seals in the circuit.
5.2) Intake valve not working
correctly n.36.
5.3) Failure of seal at outlet
valve n.35.
5.4) Worn seal n.30.
Remedy
1.1) Check for any possible
blockages or losses on the
air-line and fix.
1.2) Shut off pump for an
instant and drain off water
from the filter by means of
the screw (Pos. H - fig. 01).
1.3) Remove silencer and
clean.
1.4) Close air - supply
(discharge pressure)
dismantle and clean filter
Pos. A.
2.1) Replace seal.
3.1) Replace seal.
4.1) Clean out filter .
4.2) Check and adjust for
perfect hermetic seal n.37.
5.1) Fix any leakages.
5.2) Dismantle valve, clean
or if necessary replace.
5.3) Dismantle valve, clean
or if necessary replace.
5.4) Replace seal.
5.1
FAULT - FINDING CHART
