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Sealing The Rolling-contact Bearings ("increased Degree Of Protection" Option) - Siemens 1LA8 Operating Instructions Manual

Simotics tn series n-compact induction motor.
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9.1 Inspection and maintenance

Sealing the rolling-contact bearings ("Increased degree of protection" option)

Relubricating the grease tank
In order to achieve optimum sealing of the rolling contact 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.
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.
Touch up any damaged paintwork
If the paint is damaged, it must be repaired in order to protect the unit against corrosion.
Paint system
Contact the Service Center (Page 143) before you repair any paint damage. They will provide
you with more information about the correct paint system and methods of repairing paint
Explosion danger caused by incorrect painting
The paint coat can become electrostatically charged where there is a thick coat. Electrostatic
discharges can occur. There is a risk of explosion if potentially explosive mixtures are also
present at this moment. This can result in death, serious injury or material damage.
You must comply with one of the following requirements when you repaint painted surfaces:
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014


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