Series MNKA bearing pedestal assembly 4
Page 17
9250-003-en
Revision 01
TM 10458
Published 06/2022
7.4 Standby pumps
If a pump is on standby, it must be started up from
time to time. Turn the shaft regularly by hand in
the direction of rotation.
In the case of pumps which are exposed to severe
vibrations from the system, this procedure must
be carried out more frequently.
When dismantling the pump from the system,
drain it, clean it thoroughly, seal it with flange
covers and store it in accordance with the
instructions.
7.5 Instructions for dismantling
♦
All repair and maintenance work is to be per-
formed by qualified personnel using appropri-
ate tools and original spare parts.
♦
Is the necessary documentation available?
♦
Has the pump been taken out of operation,
drained and flushed correctly?
See also
section 6.3
.
♦
If reassembly is not performed immediately af-
ter dismantling, the plastic and ceramic com-
ponents in particular must be stored carefully.
7.5.1 Protective clothing
Even if the pump has been properly
drained and flushed, residue of the
medium may still remain in the pump,
e.g. between sealing surfaces, in the
bearing clearances or in the can or
can insert.
Plastic parts may absorb medium, which gradually
exudes from the material after flushing.
Proper protective clothing must be
worn.
Protective clothing must be worn even if only the
bearing pedestal is to be removed. Medium may
have leaked through the can into the lantern
chamber.
7.5.2 Magnetic fields
Attention! Strong magnetic fields
Risk during dismantling and in prox-
imity to individual parts of magnetic
couplings.
Remove loose parts and other magnetizable
metals from the workbench. These may otherwise
be attracted: Risk of accident!
Place any tools needed at a safe distance.
Keep electronic equipment and measuring instru-
ments at a distance. If in doubt, consult the equip-
ment manufacturer.
Hold the individual parts of the magnetic
couplings firmly or secure them. Otherwise they
could be attracted, for example, by a vice: Risk of
accident!
People with an artificial pacemaker:
Keep torso at a minimum distance of
20
“
(500 mm).
For safety’s sake, a distance of 6” (150 mm)
should be observed for watches, electric data
carriers, data carriers with magnetic strips, etc.
7.6 Dismantling
There are three options for dismantling:
1. Removing the complete pump from the plant.
2. Removing the complete slide-in unit; the pump
housing can remain in the plant connected to
the piping.
3. Removing the complete drive unit from the
plant. The pump does not need to be drained.
Dismantling of the complete pump is described here.
For the structure and individual parts of the pump,
see the exploded view drawing in
section 9
and
the sectional drawing in
section 10
.
If the coupling is a removable coupling, the
engine can also stop.
♦
Detach support bracket
183
from the base plate.
♦
Undo housing screw connection
901/3, 552/3
.
♦
Remove the complete slide-in unit.
If the housing
100
remains in the plant,
leave the housing gasket
401
in the
centering to protect the housing seal-
ing surface.
ATTENTION!
When pulling out the slide-in unit, this part must be
secured against falling out.
The integrated support rings in the lantern can be
used for this purpose.
Or use the optionally available slide and support
block. See assembly aids in
section 11.4
.
The torque of the installed magnetic coupling is
specified on the
type plate
.
7.6.1 Dismantling the slide-in unit
♦
Transport the slide-in unit by means of the inte-
grated support rings in the lantern.
Additionally, the supplied ring bolt can be
screwed into the bearing pedestal flange
straight up (“12 o’clock”).
Remove the threaded cap beforehand.
This means two slinging aids are available.
♦
Place the slide-in unit on a workbench or work-
top and secure it.
♦
Remove fastening screws
901/17
with washers
554/11
.
♦
Remove the threaded sealing caps from the
threaded holes of the bearing pedestal flange.
Screw in the two M16 assembling threaded rods
supplied.
