Hilti DD 120 Manual De Instrucciones página 36

5.6 installing the water collection system (accessory)
WARNING
Danger of electric shock! There is a possibility of water flowing over the motor and cover if the vacuum
removal system is faulty.
▶ Cease operations immediately if the vacuum removal system is not working.
CAUTION
Risk of injury! Inadvertent starting of the product.
▶ Unplug the supply cord before making adjustments to the power tool or before changing accessories.
For drilling upward, the diamond core drilling machine must be at a 90° angle to the underside of the
slab. The water collection system sealing disc must match the diamond core bit diameter.
Use of the water collection system allows water to be led away under control, thus preventing the
surrounding area from being heavily soiled.
1. Remove the screw from the drill stand.
2. Install the water collector holder on the drill stand with the screw.
3. Position the water collector, with seal and water collector sealing disc installed, between the two movable
arms of the water collector holder.
4. Press the water collector against the work surface by turning the two screws on the water collector
holder.
5. Connect a wet-type industrial vacuum extractor to the water collector or establish a hose connection
through which the water can drain away.
5.7 Inserting a diamond core bit (BI+ chuck)
DANGER
Risk of injury Fragments of the workpiece or of broken insert tools may be ejected and cause injury beyond
the immediate area of operation.
▶ Do not use damaged insert tools. Check the insert tools for chipping, cracks, or heavy wear each time
before use.
CAUTION
Risk of injury! Inadvertent starting of the product.
▶ Unplug the supply cord before making adjustments to the power tool or before changing accessories.
Replace diamond core bits as soon as their cutting performance and/or rate of drilling progress drops
significantly. This generally is the case when the diamond segments wear to a height of less than 2
mm (1/16 in).
A 27 mm open-ended wrench is required for C-Rod, A-Rod, M27 and BR chucks.SW 27
1. Lock the diamond core drilling machine by fully tightening the carriage lock.
2. Open the chuck (BI+) by turning it in the direction indicated by the "open brackets" symbol.
3. From below, push the connection end of the diamond core bit into the splines of the chuck on the
diamond core drilling machine.
4. Close the chuck by turning it in the direction indicated by the "closed brackets" symbol.
5. Check that the diamond core bit is seated securely in the chuck.
5.8 Selecting the speed
CAUTION
Risk of wear and tear Risk of damage to the gearing
▶ Do not attempt to change gear while the machine is running. Wait until the arbor comes to a complete
stop.
30 English
Printed: 09.08.2019 | Doc-Nr: PUB / 5069516 / 000 / 07
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