Maintenance Program; Impeller Replacement - Faggiolati Pumps M420 Instrucciones De Instalacion Y Uso


the direction of the pump rotation. See "Direction
of rotation";

make sure the valves are open and intact;

make sure the tubes, impeller and filter are not
obstructed;

the impeller should rotate freely;

make sure that the head required by the plant has
not changed;

check for leaks in the pipes;

make sure the impeller is not worn.
Warning Do not continuously try to start the
mixer if the thermal protection
device triggers.

IMPELLER REPLACEMENT

IMPELLER DISASSEMBLING
Pumps repair and maintenance works must be carried out
only by skilled personnel, by using originals spare parts.
Safety standards must be observed, see page 9 "Safety
Standards"
Danger WARNING! Worn impellers have
usually very cutting edges

Lean the pump horizontally

Disassemble the suction flange group pos. 96-97

Take the impellers locking screw off pos. 94-95

Remove the impeller pos. 92 by the extractor pos.
93
IMPELLER ASSEMBLING

Verify that the end of the shaft is clean without
snaggings

Clean and remove each imperfection

Push the impeller in the shaft by the washer and
the impeller locking screw pos. 94-95

Tighten the impeller's screw by a tightening
couple of 34 Nm

Verify that it is possible to turn the impeller by
hand.

Assemble the suction flange with the tightening
couple.

MAINTENANCE PROGRAM

Inspection interval:
Once 2000 working hours or once par year
Check Type
Pumps outward
parts and -
installation
Insulating oil
AGIP
level and
ITE 360
condition
Ball bearing
ARCANOL
lubricating
L71V
grease
Impeller wearing
-
level
Electric cables
-
conditions
Float switches -
Outward
-
insulation test
Cleaning cooling
-
jacket
13
ENGLISH
Maintenance
Check the hoisting chains
and ropes.
Check guide rails are in
vertical position.
Tighten all bolts and
nuts.
Replace or fix all the
warn or damaged parts.
An oil condition check
may reveal eventual
infiltrations.
Warning! An air-oil
mixture may be confused
with water-oil mixture.
See page 12
"LUBRICATION"
In the eventual impeller
wearing and also of parts
in contact
If the outward insulating
protecting covering is
damaged, replace it.
Verify that cables are not
bent or pressed in a way
to get broken or warn.
Verify it's functioning.
Clean, adjust
Use a Meghommeter at
1000 V.
The insulation must be
superior to 1 meghom,
both among different
phases and between each
phase and the earth.
Verify it's functioning.
Clean, replace or repair
damaged parts.