Surface Technology
Oberflächentechnik
9
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12
Servicing the motor system
The motor bearings require no maintenance. The deep groove ball bearings are sealed and have
a lifetime lubrication.
Check the carbon brushes for wear every 4 weeks to avoid damage to the armature.
If the carbon brushes have worn down to around 5 mm they should be replaced. No exact guid-
ance of the carbon brushes in the holders can be guaranteed at a length of < 5 mm.
Proceed as follows to check or replace the carbon brushes:
1. Unplug connecting lead to foot control.
2. Dismantle flexible shaft.
3. Remove the four recessed head screws at the black motor cover.
4. Pull off the lateral motor covers.
5. Remove recess head screw of carbon brush strip.
6. Replace carbon brushes.
Carbon brushes
Recessed head screw
Allow the motor to run in for approx. 1 hour after changing the carbon brushes and installing the
cover.
Regularly remove the excess grease on the shaft connection on the motor side.
