Care And Maintenance; Service Indicator - Hilti DCH 230 Mode D'emploi

7.5 Working with diamond cutting discs (DCH 230
and DCH 180‑SL) and synthetic resin-bonded
fiber-reinforced cutting discs (only DCH 230)
en
DANGER
To reduce the risk of kick-back, avoid bringing the
cutting tool into contact with the material in the area
indicated.
DANGER
Wherever possible, bring the guide wheels into con-
tact with the workpiece before starting the cut. Take
extra care in situations where this is not possible or
where the cutting disc is inserted in an existing cut.
1. When cutting mineral materials, first bring the tool's
guide wheels into contact with the object to be cut.
2. Allow the power tool to reach full speed.

8 Care and maintenance

CAUTION
Disconnect the supply cord plug from the power out-
let.
8.1 Care of the power tool
DANGER
Under extreme conditions, when used for working on
metal, conductive dust may accumulate inside the tool.
This may have an adverse effect on the tool's protective
insulation. Under such conditions, the tool should be
plugged into a ground fault circuit interrupter (RCD)
and use of a stationary dust removal system and

8.2 Service indicator

NOTE
The power tool is equipped with a service indicator.
14
3. Apply pressure to the power tool so that the cutting
disc is pressed into the material slowly. This ensures
that particles and sparks generated by the cutting
operation are caught by the hood and extracted by
the dust removal system.
NOTE Apply moderate pressure, adjusting the rate
of advance to suit the material being cut.
NOTE 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 disc by
allowing the tool to run under no load.
A drop in the rate of cutting progress can be an
indication of "blunt" (polished) diamond segments.
The segments can be resharpened by making a few
cuts in an abrasive material (Hilti sharpening plate
or sand-lime block).
7.6 Using a suitable vacuum cleaner for working on
mineral materials
NOTE
Please read the operating instructions for the vacuum
cleaner for information about disposal of the material
collected.
Dust can be kept to a minimum when working by using
a suitable vacuum cleaner (such as the Hilti VCD 50).
Use of a vacuum cleaner also helps to cool the segments
on the disc and thus reduces segment wear. In order to
avoid electrostatic effects, a vacuum cleaner equipped
with an antistatic hose should be used.
frequent cleaning of the tool's cooling air slots is
recommended.
The outer casing of the motor and the grips are made
from impact-resistant plastic. Parts of the grips have a
synthetic rubber covering.
Never operate the power tool when the ventilation slots
are blocked. Clean the ventilation slots carefully using
a dry brush. Do not permit foreign objects to enter the
interior of the power tool. Clean the outside of the power
tool at regular intervals with a slightly damp cloth. Do
not use a spray, steam pressure cleaning equipment or
running water for cleaning. This may negatively affect the
electrical safety of the power tool. Always keep the grip
surfaces of the power tool free from oil and grease. Do
not use cleaning agents which contain silicone.