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Maintenance
9.3 Corrective maintenance
9.3.1.1
Bearing bushes
Protect the bearings against the ingress of dirt and moisture.
When fitting the bearing cartridges, observe the specified screw tightening torques
(Page 119).
9.3.1.2
Installing bearings
Sealing the bearings
Note the following details:
• Shaft sealing rings are used to seal motors at the rotor shaft.
– For V rings, comply with the assembly dimension.
• Use the specified bearings.
• Ensure that the bearing sealing disks are in the correct position.
• Insert the elements for bearing preloading at the correct end.
• Fixed bearings can have a locking ring or bearing cover.
• Seal the bearing cap screws with the appropriate gaskets or with grease.
• Do not interchange the position of the bearing covers (DE and NDE or inner and outer).
Danger as a result of rotor falling out
If the motor is in a vertical position, the rotor can fall out while work is being performed on
the locating bearing. This can result in death, serious injury or damage.
• Support or unload the rotor when carrying out work with the motor in a vertical position.
Installing rolling bearings
• Extreme caution and attention to cleanliness are vital when installing rolling bearings.
Observe the correct assembly sequence of the components.
• Attach all components with the specified tightening torques (Page 119).
• For individually mounted angular contact ball bearings, carefully comply with the
installation position corresponding to the permissible direction of force.
• Angular contact ball bearings arranged in pairs must always be installed in strict
compliance with the manufacturer's specifications.
• Always use angular contact ball bearings of the same type.
Note
For further information about mounting the rolling bearing, please refer to the catalog or the
information provided by the rolling bearing manufacturer.
100
1LE7 shaft heights 71 ... 315
Operating Instructions, 04/2022, A5E51689275A-AA
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