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If the paint is damaged, it must be repaired to protect the unit against corrosion.
Pay special attention to bearings when their calculated rated lifetime is coming to an end.
When signs of wear are noticed, dismantle the motor, check the parts, and replace if necessary.
When bearings are changed, replacement bearings must be of the same type as those originally
fitted. The shaft seals must be replaced with seals of the same quality and characteristics as the
originals when changing bearings.
MAINTENANCE AND REPAIR
Cleaning
Regularly clean the cooling air passages through which the ambient air flows, e.g. using dry
compressed air.
Particularly when carrying out cleaning using compressed air, make sure you use suitable safety
wear.
If there are condensate drain holes present, these must be opened at regular intervals, depending on
climatic conditions. To maintain the degree of protection, any condensation drain holes need to be
closed.
Instructions for Repair
Only appropriately qualified persons should be deployed to commission and operate equipment.
Qualified persons, as far as the safety instructions specified in this manual are concerned, are those
who have the necessary authorization to commission, ground and identify equipment, systems and
circuits in accordance with the relevant safety standards.
Before you begin working on the three-phase motor, in particular before you open the covers of
active parts, make sure that the three-phase motor or system is properly isolated from the supply.
Replacing Bearings
Special care should be taken with the bearings. These must be removed using pullers and fitted by
heating or using special tools for the purpose.
Do not reuse bearings that have been removed.
Rewinding
Rewinding should always be carried out by qualified repair shops.
Assembly
If possible, assemble the motor on an alignment plate.
Avoid damaging the windings protruding out of the stator enclosure when fitting the end Shield
Take care not to damage the cable jacket. Tightening torques must be adapted to suit the type of
cable jacket material in use.
Shaft sealing should be assembled to the right position without any damage.
Check the terminal box seals and if required, replace.
Do not forget the foam cover in the cable entry (seal all holes completely and prevent cables
from touching any sharp edges).
Repair any damage to the paint (also on screws/bolts).
Check the tightening torques of all screws, as well as those of screws which have not been
unscrewed.
DISPOSAL
Dismantle the motor using the general procedures commonly used in mechanical engineering.
Dispose of the separated components according to local regulations or via a specialist disposal
company.
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