Siemens SIMOTICS XP 1MB5 SH400, Operating Instructions Manual, Page: 118 / 166

9.2.11 Sealing the rolling bearings ("Increased degree of protection" option)
Relubricating the grease tank
In order to achieve optimum sealing of the rolling bearings and to reliably seal the labyrinth
joints with grease, the chamber must be relubricated at regular intervals. The procedure is the
same as that for lubricating grease. The sealing effect during operation is optimum as long as
a small amount of relatively clean grease is forced out.
Regreasing intervals
The necessary relubrication intervals depend essentially on the level of dirt in the environment
and on the ON time of the motor. For this reason, they can only be defined taking into account
the respective operating conditions. Make sure that the groove in the seal is full of grease at all
times.
9.2.12 Keeping the cooling air flow clean
The cooling ducts must be free of any pollution in order that the machine is adequately cooled.
● Regularly clean the grids, ducts, ribs, pipes etc. to remove dust and pollution.
9.2.13 Cleaning
Cleaning the grease ducts and spent grease chambers
The spent grease collects outside each bearing in the spent grease chamber of the outer
bearing cap. When replacing bearings, remove the spent grease.
Note
Dismantle the bearing cartridges to replace the grease in the lubrication duct.
Cleaning the cooling air ducts
Regularly clean the cooling air ducts through which the ambient air flows.
Maintenance
9.2 Inspection and maintenance
1MB5 SH 400/450
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Operating Instructions, 05/2019, A5E45959221A