Sealing The Rolling-Contact Bearings ("Increased Degree Of Protection" Option); Keeping The Cooling Air Flow Clean; Touch Up Any Damaged Paintwork; Maintaining Terminal Boxes - Siemens SIMOTICS TN Series Operating & Installation Instructions Manual

9.1.9

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.
9.1.10

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.
9.1.11

Touch up any damaged paintwork

If the paint is damaged, it must be repaired in order to protect the unit against corrosion.
Note
Paint system
Contact the Service Center (Page 137) before you repair any paint damage. They will provide
you with more information about the correct paint system and methods of repairing paint
damage.
9.1.12

Maintaining terminal boxes

Requirement
The machine is de-energized.
SIMOTICS TN Series N-compact 1LL8
Operating Instructions 11/2018
Maintenance
9.1 Inspection and maintenance
107