Hilti DCH 300 Handbuch Seite 36

5.10 Adjusting the water flow rate
DCH 300–X
▶ Turn the water regulator valve until the desired water flow rate is set.
5.11 Disconnecting the water supply
DCH 300–X
1. Shut off the water supply to the cutter.
2. Disengage the coupling (proprietary system) of the hose providing the water supply to the cutter.
5.12 Switching on the cutter
1. Plug the supply cord into the power outlet.
2. DCH 300­X: Press the ON button on the PRCD.
3. Hold the tool firmly with both hands, using the front and rear grips.
4. Press the switch-on safety lock.
◁ The on/off switch is unlocked.
5. Press the on/off switch.
◁ The cutting disc begins to rotate.
6. Release the switch-on safety lock and reposition your thumb firmly round the rear grip.
5.13 Working safely with the cutter
Conditions: Working on mineral materials
There is a risk of kickback if the cutting disc comes
into contact with the working surface in the area
indicated.
▶ Avoid bringing the cutting disc into contact with the working surface in the area indicated.
▶ Always bring the guide wheels into contact with the working surface / workpiece before starting the
cut.
▶ Allow the power tool to reach full speed before beginning cutting.
▶ Apply pressure to the power tool so that the cutting disc is pressed into the material slowly.
▶ Apply moderate pressure, adjusting the rate of advance to suit the material being cut.
A decrease in the rate of cutting progress may be an indication of blunt/dull ("polished")
diamond segments. The diamond segments can be resharpened by making a few cuts in an
abrasive material (Hilti sharpening plate or sand-lime block).
▶ Guide the power tool smoothly and do not apply lateral pressure to the cutting disc.
The diamond disc may overheat and suffer damage when cutting very hard mineral materials, e.g.
concrete with a high hard pebble content. A trail of sparks right round the circumference of the diamond
cutting disc is a sure indication of this.
▶ Should this occur, stop cutting and cool the diamond cutting disc by allowing the power tool to run
under no load.
Dust can be kept to a minimum when working by using a suitable vacuum cleaner. Use of a vacuum
cleaner also helps to cool the segments on the disc and thus reduces segment wear.
▶ The vacuum cleaner should be equipped with an antistatic suction hose in order to avoid electrostatic
effects.
30 English
Printed: 08.02.2018 | Doc-Nr: PUB / 5398318 / 000 / 01
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