4. To clean the impeller and the pump interior, guide the
water jet inside via the pressure port.
5. Flush all dirt residue onto the floor of the channel.
6. Allow the pump to dry out.
In order to completely drain the pump housing, lie it
down on its side for approx. 5 minutes. Place the pres-
sure port face down.
8.4.2.1 Cleaning the strainer
The strainer can be removed for cleaning.
2
2
1
Fig. 7: Remove the baseplate
1
Strainer
2
Fastening screws, size 4 Allen key
1. Place the pump on a firm surface in a horizontal position.
WARNING! Risk of hands being crushed. Make sure
that the pump does not fall over or slip.
2. Remove the fastening screws at the strainer.
3. Take out the strainer.
4. Rinse the strainer and baseplate of the hydraulics with
clear water and remove solids manually.
5. Put the strainer in place.
6. Screw in the fastening screws. Max. tightening torque:
5.5 Nm (4 ft·lb)!
▶ Strainer cleaned and fitted, complete the cleaning work.
Installation and operating instructions Wilo-Padus UNI
Maintenance and repair
9
2
9.1
9.2
Maintenance and repair
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal in-
jury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
▪ Always carry out maintenance tasks in a clean location
with good lighting. It must be possible to position the
pump safely and secure it.
▪ Only carry out maintenance tasks mentioned in these in-
stallation and operating instructions.
▪ Wear the following protective equipment while perform-
ing maintenance tasks:
– Safety goggles
– Safety shoes
– Safety gloves
Personnel qualifications
▪ Electrical work: A qualified electrician must carry out the
electrical work.
▪ Maintenance tasks: The technician must be familiar with
the use of operating fluids and their disposal. In addition,
the technician must have basic knowledge of mechanical
engineering.
Operator responsibilities
▪ Provide the necessary protective equipment and make
sure that the personnel wears it.
▪ Collect operating fluids in suitable tanks and dispose of
properly.
▪ Dispose of protective clothing used in accordance with
regulations.
▪ Use only original parts of the manufacturer. Use of parts
other than the original parts releases the manufacturer
from any liability.
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