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Maintenance
9.3 Corrective maintenance
9.3
Corrective maintenance
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
If the motor has to be transported, please observe the information and instructions in
Chapter "Transport (Page 29)".
Note
Before commencing removal, you should mark how each of the fastening elements has been
assigned, as well as how internal connections are arranged. This simplifies subsequent
reassembly.
Avoid damaging the windings protruding out of the stator enclosure when assembling the
end shield.
If possible, assemble the motor on and alignment plate. This ensures that the mounting feet
surfaces are all on the same plane.
Sealing measures
1. Apply the necessary liquid sealant, e.g. Fluid-D, Hylomar, to the centering edge.
2. Check the terminal box seals, and if required, replace these.
3. Repair any damage to the paint, also to screws/bolts.
4. Take the necessary measures to ensure compliance with the applicable degree of protection.
5. Do not forget the foam rubber cover in the cable entry. Completely seal the holes, and
ensure that cables do not come into contact with sharp edges.
9.3.1
Rolling bearings
Refer to the rating plate or the catalog for the designations of the bearings being used.
Bearing lifetime
Prolonged storage periods reduce the useful lifetime of the bearing grease. For permanently
lubricated bearings, this reduces the bearing service life.
We recommend that the grease is replaced after a storage time of 12 months. Replace
greased bearings also in the case of closed bearings (suffix 2Z or 2 RS). After 4 years in
storage, generally replace all rolling bearings and grease.
98
1LE7 shaft heights 71 ... 315
Operating Instructions, 04/2022, A5E51689275A-AA
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