9
Troubleshooting
When the motor does not rotate
or stutters
…
Possible reason: worn carbon
brushes
The operations described below
should only be performed by skilled
persons
.
Turn of the endcap of the motor.
Pull off the cable. Disengage the
screw:
Remove the carbon brush:
Put in a new carbon brush. Check
the position of the spring on the
brush. It must be in the middle of
the brush. The carbon brush is a
wearing part and has to be
exchanged when worn. You will find
a pair of carbon brushes enclosed.
Check the second brush as well.
When the handpiece becomes
warm
…
Should the handpiece become
warm or make loud running noises,
probably the ball bearings in the
handpiece front part are worn. In
this case we recommend to send us
the handpiece for service.
