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9.3
Repair
Observe the following when carrying out any work on the machine:
● Comply with the general safety instructions (Page 1)
● Comply with the applicable national and sector-specific regulations.
● When using the machine within the European Union, comply with the specifications laid down in EN 50110-1 regarding
safe operation of electrical equipment.
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.
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 holding plate above the foam cover at the terminal box cable entry point. Completely seal the holes,
and ensure that cables do not come into contact with sharp edges.
● Position all rating and supplementary plates as in the original state.
● Where relevant, fix electric cables.
● Check the tightening torques of all screws, as well as those of screws that have not been released.
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.
Replacing bearings
Recommended interval after which bearings are to be replaced under normal operating conditions:
Table 9-1
Bearing replacement intervals
Ambient temperature
50 °C
● Do not reuse bearings that have been removed.
● Remove the dirty spent grease from the bearing shield.
● Replace the existing grease with new grease.
● Replace the shaft seals when the bearings are replaced.
● Slightly grease the contact surfaces of the sealing lips.
1LE7
A5E36065207, 04/2018
Principle of operation
Horizontal coupling operation
Bearing replacement intervals
50 000 h
29
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