9.1 Inspection and maintenance
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
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.
Contact the Service Center (Page 149) before you repair any paint damage. They will provide
you with more information about the correct paint system and methods of repairing paint
Explosion hazard 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:
● Limit the total paint film thickness according to the explosion protection group:
● Limit the surface resistance of the paint used:
– IIA, IIB: Total paint coating thickness ≤ 2 mm
– IIC: Overall coating thickness ≤ 0.2 mm for motors of group II (gas)
– Surface resistance ≤ 1 GΩ for motors of groups II and III (gas and dust)
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017