Wilo Rexa UNI Series, Installation And Operating Instructions Manual, Page: 51 / 776

Maintenance and repair en
Installation and operating instructions Wilo-Rexa UNI 51
1
2
Fig. 10: Disassemble baseplate
1 Safety screw
2 Baseplate
1. Place the pump on a firm surface in a horizontal position.
WARNING! Risk of hands being crushed. Ensure that
the pump cannot fall over or slip away!
2. Unscrew the safety screw (Allen bolt 4) of the baseplate
half-way, until the bayonet coupling can be turned.
3. The baseplate is attached with a bayonet coupling. Turn
the baseplate clockwise (to the right) and remove.
4. Rinse the interior area of the hydraulics with clear water,
remove solids manually. WARNING! Sharp edges can
form on the impeller. This can lead to extremities be-
ing cut off! Wear safety gloves to protect against cuts!
5. Check correct position of O-ring on the baseplate.
6. Lubricate the O-ring with O-ring grease and set the
baseplate on the hydraulic part.
7. Turn baseplate anticlockwise (to the left). The baseplate
is fixed in place with the bayonet coupling.
8. Screw in the safety screw of the baseplate. Max. tight-
ening torque: 1.5 Nm (1.1 ft·lb)!
▶ Hydraulics cleaned and locked, complete cleaning tasks.
9 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
9.1 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.
9.2 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.
▪ Collect any leakage of fluid and operating fluid immedi-
ately and dispose of it according to the locally applicable
guidelines.
▪ Provide the tools required.
▪ If flammable solvents and cleaning agents are used, open
flames, naked lights and smoking are prohibited.