Replacing Bearings In Explosion-Proof Machines; Fitting Bearings - Siemens SIMOTICS XP Eagle Line 1MB1.33 Operating Instructions Manual

9.3.4.1

Replacing bearings in explosion-proof machines

• When changing the bearings, renew the sealing rings and only use original Siemens spare
parts.
• For radial sealing rings with dust protection lip (DIN 3760-AS), completely fill the spaces
(100%) in the sealing ring as well as in the bearing shield hub with a suitable grease.
9.3.4.2

Fitting bearings

Note
Bearing seals for explosion-protected machines
For explosion-protected machines, only use the original replacement and repair parts.
Sealing the bearings
Note the following details:
• Shaft sealing rings are used to seal machines 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 machine 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 167).
1MB1.33 Eagle Line shaft heights 71 ... 315
Operating Instructions, 08/2023, A5E52990459A
Maintenance
9.3 Corrective maintenance
139