Explosion Hazard Due To Overheating Of The Rolling Bearings - Siemens SIMOTICS XP Series Operating Instructions Manual

Maintenance
9.3 Corrective maintenance
Procedure
1. Replace the damaged components.
2. Remove any dirt from the components. Remove any grease 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. Ensure that the rolling bearing is resting against the shaft shoulder or the 2nd 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 (if one is available), 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.
13. Install the outer bearing cover (if one is available).
14. Install the sealing elements:
9.3.4.3

Explosion hazard due to overheating of the rolling bearings

Explosion hazard due to overheating of the rolling bearings
If the rolling bearings are not regularly regreased, local overheating may be possible, and,
as a consequence, an explosion in an explosive atmosphere. This can result in death,
serious injury, or material damage.
• Regrease the rolling bearings regularly according to the lubrication plate.
• Implement bearing temperature monitoring if not yet in existence.
126
WARNING
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A