W&H S-11 L G Instructions For Use Manual page 17

Handpiece
Do not assemble or remove the
handpiece during the operation!
Push the handpiece onto the motor.

When using a locking pin between motor
and handpiece: See Instructions for use of
the drive unit.
Check the secure hold on the motor.

or
Remove the handpiece from the motor by pulling

in an axial direction or by pressing the release
button.
17