15
LI 4431.00 (IT-EN)
Operating and maintenance instructions
EN
6.1 General information
In order to keep the pump operating at a high efficiency level, it is mandatory to follow
all periodical service points listed in the table below.However, more frequent service
operations may be necessary depending on what the pump is used for (suction of con-
densable vapours, suction of powders or polluting substances).
For such cases, only direct experience can indicate the correct service frequency needed.
The exhausted oil and the replaced spare parts must be considered as special waste
products and handled according to the local regulations in the Country of use.
WARNING:
Before every maintenance operation:
Always ensure that the pump is insulated from the electrical network so that it
can’t start automatically.
Wait until the pump gets cool and make sure it has reached a non-dangerous
temperature.
Introduce air in the inlet circuit.
SERVICING FREQUENCY
DESCRIPTION OF THE OPERATION
AUTHORIZED PERSONNEL
24 Hours/every day
Check oil level before starting.
Operator
100 Hours/every week
Clean the external inlet element with a blast of air (Figure 9
pos.A).
Operator
Clean the cooling surfaces of the pump, of the oil cooler and of
the electric motor with a blast of air.
Operator
500/1000*
Hours/every 6
months
Change the lubricating oil (Figure 9 pos. C).
Skilled Worker
If the pressure gauge is fitted to the pump, check the oil separator
(max 0,6 bar), if necessary, replace it.
Skilled Worker
Replace the gas-ballast felt disk (Figure 9 pos. K).
Skilled Worker
2000 Hours/every year
Replace the exhaust filters (Figure 8 pos.B).
Skilled Worker
Check and if necessary replace the coupling elastic insert
(Figure 9 pos. D).
Skilled Worker
Check the electrical connections.
Skilled Worker
Check functionality of the float valve and clean it.
Skilled Worker
30000 Hours/every 5 years
Pump overhaul.
Customer Service
* The first oil change has to be done after 500 hours of operation. If any polluting substances are found in the oil, next oil
change could take place within 1000 hours.