Siemens SIMOTICS SD Operating Instructions Manual page 111

• 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 machine in a vertical position.
Installing rolling bearings
• Extreme caution and attention to cleanliness are crucial when installing rolling bearings.
Observe the correct assembly sequence of the components.
• Attach all components with the specified tightening torques (Page 133).
Note
For further information about mounting the rolling bearing, please refer to the catalog or the
information provided by the rolling bearing manufacturer.
Procedure
1. Replace the damaged components.
2. Remove any dirt from the components. Remove any grease residue and the remains of
sealant or liquid threadlocker.
3. Prepare the bearing seats:
– Lightly oil the inner ring seat.
– Grease the outer ring seat with a solid lubricant such as Altemp Q NB 50.
– Press the inner bearing cover onto the shaft.
4. Warm up the rolling bearing.
5. Push the inner ring of the warmed up rolling bearing onto the shaft. Avoid any blows that
might damage the bearing.
6. Make sure that the rolling bearing is resting against the shaft shoulder or the second bearing.
7. Fill the bearing to the top with the specified lubricating grease as stamped on the lubricant
plate.
8. Warm up the grease slinger and push it onto the shaft.
9. Depending on the particular version, fix the bearing with a locking ring or shaft nut.
10.Support the rotor when installing the bearing housing or bearing end shield.
11.Use a suitable sealant when assembling.
12.Assemble the bearing shield or bearing housing together with the bearing shield.
1LE5, 1PC4 shaft heights 280 ... 355
Operating Instructions, 11/2022, A5E41454666A
Maintenance
9.4 Corrective maintenance
109