Hilti DD 150-U Mode D'emploi page 56

4. Remove the core bit.
6.4 Removing the diamond core bit with an alternative type of chuck
1. Lock the drive spindle with a suitable open-end wrench.
2. Remove the core bit with a suitable open-end wrench.
6.5 Selecting the speed
Press the switch only when the tool is stationary.
1. Set the selector switch to suit the diameter of the core bit used.
2. Turn the gear selector while at the same time manually turning the core bit into the recommended
position.
6.6 Activate/deactivate continuous running lock
Never use continuous running lock in handheld operation!
1. Press and hold down the on/off switch.
2. Press and hold down the continuous running lock.
3. Release the on/off switch.
4. Release the continuous running lock.
To deactivate the continuous running lock again, press the on/off switch until the continuous
running lock jumps back to its initial position.
6.7 Operating portable residual current device (PRCD)
WARNING
Risk of injury due to electric shock! Do not continue operating the diamond core drilling machine if the
indicator on the ground fault circuit interrupter does not go out when the 0 or the TEST button is pressed.
▶ Have your diamond core drilling machine repaired by Hilti Service.
1. Plug the diamond core drilling machine's mains plug into an earthed/grounded power outlet.
2. Press the "I" or "RESET" button on the portable residual current device (PRCD).
▶ The indicator lights up.
3. Press the "0" or "TEST" button on the portable residual current device (PRCD).
▶ The indicator goes out.
4. Press the "I" or "RESET" button on the portable residual current device (PRCD).
▶ The indicator lights up.
6.8 Use of the two-part hole-starting aid
CAUTION
Risk of injury caused by incorrect use! Parts can come off the hole-starting aid if it is not pressed against
the work surface.
▶ When a two-part hole-starting aid is used, do not run the diamond core drilling machine without the
hole-starting aid pressed against the work surface.
A different hole-starting aid is required for each core bit diameter.
1. Fit the hole-starting aid into the open end of the diamond core bit.
2. When you start drilling apply only light pressure until the core bit has centered itself. Then apply more
pressure. Drill a guide cut 3-5 mm deep.
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