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•
easily inflammable dissolvers and cleaning materials
are used, open fire, open light as well as smoking are
prohibited.
•
Ensure that the required tools and materials are read-
ily available. Tidiness and cleanness ensure safe and
proper work on the machinery. Remove used clean-
ing materials and tools from the machinery after the
work has been carried out. Keep all materials and
tools in a dedicated place.
•
Service media (such as for example oils, lubricants,
etc.) must be captured in a suitable container and
must be disposed of according to the regulation
75/439/EEC and writ §5a, 5b abfG, Waste Avoidance
and Management Act). Respective protective clothing
must be worn when carrying out cleaning work and
maintenance work. This must be disposed of accord-
ing to waste catalogue TA 524 02 and EC directive
91/689/EEC. Only lubricants recommended by the
manufacturer must be used. Oils and lubricants must
not be mixed. Only use manufacturer's original parts.
A test run or function test of the machinery must only be carried
out according to the general operating conditions!
6.2. Maintenance schedule
Every six months:
•
Visual inspection of the power supply leads
•
Visual inspection of the cable holders and the wiring
•
Visual inspection of accessories, such as for example
suspension device, lifting devices, etc.
6.3. Maintenance work
Visual inspection of the power supply leads
The power inlet leads must be inspected for bubbles,
cracks, scratches, scour marks and/or crushing zones.
If damages are detected, the damaged power inlet lead
must be replaced immediately.
The leads may only be replaced by the manufacturer
or an authorized/certified service workshop. The ma-
chinery must only be started after appropriate repair
of the damage!
Visual inspection of the cable holders (biners) and the
wiring (traction cable)
If the machine is used in basins/shafts the hoisting wires/
cable holders (biners) and the wiring are subject to con-
stant wear and tear. Regular inspections are required to
prevent a complete wear and tear of the hoisting wires/
cable holders (biners) and/or wiring and a complete dam-
age to the power cable.
The hoisting wires/cable holders (biners) and the wir-
ing must be replaced immediately if there are slight
signs of tear and wear!
Visual inspection of accessories
The accessories, such as for example suspension devic-
es, lifting devices, etc. must be checked for correct fitting.
Loose or defective accessories must be repaired/replaced
immediately.
28 | ENGLISH
7. Repairs
7.1. General
The following repairs can be carried out on this machine:
•
Changing the impeller and pump unit
•
Changing wear rings
When carrying out repair work, the following information
should always be noted:
•
Round sealing rings as well as existing seals should
always be replaced.
•
Screw fixings such as spring washers should always
be replaced.
•
The correct torques must be observed.
In general, the following applies to repairs:
Switch off the machine, disconnect it from the mains
(have this done by an electrician), clean it and place
it on a solid base in a horizontal position. Secure it
from falling over and/or slipping.
If not otherwise stated, the torque values of the
below tables should be used. Values stated are for clean,
lubricated screws. Fixing torque [Nm] for screws A2/A4
(Coefficient of friction = 0,2)
A2/A4,
Hardeness class 70
DIN912/DIN933
M6
7 Nm
M8
17 Nm
M10
33 Nm
M12
57 Nm
M16
140 Nm
M20
273 Nm
7.2. Changing the impeller and pump unit
Changing the impeller and the pump unit.
•
Loosen and remove the screws on the sealing
housing.
•
Secure and remove the pump housing from the seal-
ing housing with suitable equipment, e.g. hoisting
gear. Place on a secure base.
•
Fasten the impeller with suitable equipment, loosen
and remove the impeller fastening (cylindrical screw
with socket hex).
Pay attention to the locking screw!
•
Remove the impeller from the shaft using a suitable
extractor.
•
Cleaning the shaft
•
Attach a new impeller to the shaft.
Make sure that the sliding surfaces do not become
damaged!
A2/A4,
Hardeness class 80
DIN912/DIN933
11,8 Nm
28,7 Nm
58 Nm
100 Nm
245 Nm
494 Nm
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