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CHAPTER 8
REPAIRING THE PUMP
Before disassembling the pump
Switch off line voltage.
Close suction and delivery gate valves.
Leave the pump cool off line in case warm liquid has been
pumped.
Drain the pump through the suited draining hole (see picture).
Removing the pump from installation
A)
Full remove from the installation:
Remove bolts from suction and delivery flanges.
Remove all screws fastening the pump to the ground and lift
it with a suited hoist (see section 2). For repairing, please
send the pump to the manufacturer or to an authorized shop.
B)
Partial remove from the installation
Unscrew the screw between pump casing and lantern and
remove assembly motor/lantern cover/impeller without
removing the pipes to which pump casing remains connected.
For double impellers pumps, however, it is necessary to
remove also the delivery casing.
Use a suited hoist when moving/lifting the pump;
see section 2.
C)
Mechanical seal replacement
When replacing the mechanical seal, ensure the complete
cleaning of each part and use all necessary care to avoid
damaging the seal by knocks, jolts, cutting edges, etc. Take
care not foul sealing faces, especially with grease or oil.
To re-install the pump, please refer to section 4 and 5.
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