Richter MNK Series - Manual (Page 16)

Series MNK
Page 16
9230-050-en Revision 11
TM 7903 Edition 07/2010
When the pump is serviced, it is recommended to
replace the bearings and shaft seals as a precaution
and to pour in fresh oil.
Oil level check: The oil level is to be regularly
checked on the constant level oiler 638/1 to ensure
safe operation.
It must be ensured that there is always oil in the
constant level oiler; it must under no circumstances be
completely drained.
In potentially explosive works it is
advisable to monitor the condition of
the ball bearings
If there is a suspicion that splash water could have
entered the bearing pedestal, the oil must be replaced
immediately. Even small amounts of water in the oil
reduce the service life of the ball bearings to a fraction
of the normal service life.
7.3 Cleaning
Care must be taken when cleaning the pump to
ensure that it is not exposed to a strong water jet.
The ingress of water into the bearing pedestal will
substantially impair bearing lubrication.
7.4 Stand-by pumps
If a pump is on stand-by, it is to be started up from
time to time. Regularly turn the shaft by hand in the
direction of rotation.
This operation is to be performed more often for
pumps which are exposed to very strong vibrations
from the plant.
When dismantling the pump from the plant, drain it,
thoroughly clean it, seal with flange covers and store
in accordance with the instructions.
7.5 Notes on dismantling
All repair and maintenance work is to be performed
by skilled staff using appropriate tools and original
spare parts.
Is the necessary
documentation available?
Has the pump been taken out of operation,
evacuated and flushed correctly? See also
Section 6.3.
If no new assembly is performed immediately after
dismantling, the plastic and ceramic components in
particular must be stored carefully.
7.5.1 Protective clothing
Even if the pump has been properly
evacuated and flushed, residue of the
medium may still remain in the pump, e.g.
between sealing surfaces or in the bearing seats or in
the can or the can insert.
Plastic components may absorb medium which
gradually emerges from the material after flushing.
Proper protective clothing is to be worn.
Protective clothing is also to be worn even if only the
bearing pedestal is to be removed. Medium may
penetrated the lantern chamber through the can.
7.5.2 Magnetic fields
Caution ! Strong magnetic fields
Risk during dismantling and in the vicinity of
magnetic drives as single parts.
Remove loose parts and other magnetisable metals
from the work bench. They could otherwise be
attracted: Risk of accident!
Place any tools needed at a safe distance.
Keep
electronic equipment and measuring
instruments at a distance. In cases of doubt consult
the equipment manufacturer.
Hold magnetic drives as single parts firmly or secure.
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
500 mm .
For safety's sake, a distance of 150 mm should be
observed for watches, electric data carriers, data
carriers with magnetic strips etc.
7.6 Dismantling
There are two possibilities for dismantling:
1. Dismantling the complete pump from the plant.
2. Dismantling the complete slide-in unit as the pump
housing can remain in the plant connected to the
piping.
Dismantling of the complete pump is described here.
If the coupling installed is a spacer-type coupling, the
motor can also remain in the plant.
Undo support bracket
183 from the base plate
Undo housing screws 901/2 , 552/1
Remove entire slide-in unit
If the housing remains in the plant, leave the
housing gasket in the centering to protect the
housing sealing surface.
Caution! Magnetic forces!
Risk of accident !