Hilti DD 150?U Operating Instructions Manual page 15

5.1.5 Service
a) Have your power tool serviced by a qualified repair
person using only identical replacement parts.
This will ensure that the safety of the power tool is
maintained.
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5.2 Drill safety warnings
a) Wear ear protectors when impact drilling. Expo-
sure to noise can cause hearing loss.
b) Use auxiliary handle(s), if supplied with the tool.
Loss of control can cause personal injury.
c) Hold power tool by insulated gripping surfaces,
when performing an operation where the cutting
accessory may contact hidden wiring or its own
cord. Cutting accessory contacting a "live" wire may
make exposed metal parts of the power tool "live"
and could give the operator an electric shock.
5.3 Additional safety rules
5.3.1 Personal safety
a) During hand-held use, always hold the machine
securely with both hands on the grips provided.
Keep the grips dry, clean and free from oil and
grease.
b) Check that the side handle is tightened securely.
c) Assemble the parts of the mounting device cor-
rectly before attaching the machine. In order to
avoid the risk of collapse, it is important that the
parts are assembled correctly.
d) Attach the machine to the mounting device se-
curely before beginning use. Movement of the ma-
chine on the mounting device could lead to loss of
control.
e) Place the mounting device on a solid, flat and level
surface. If the mounting device can slip or wobble,
the machine cannot be guided smoothly and safely.
f) Check the nature of the surface. Rough surfaces
may reduce holding power. Coatings or composite
materials may pull away from the surface while you
are working.
g) Do not overload the mounting device and do not
use it as a substitute for a ladder or platform.
Overloading the mounting device or standing on it
may shift its center of gravity to a higher position,
causing it to tip over.
h) Respiratory protection must be worn if the ma-
chine is used without a dust extraction system for
work that creates dust.
i) Improve the blood circulation in your fingers by
relaxing your hands and exercising your fingers
during breaks between working.
Avoid touching rotating parts. Switch the power
j)
tool on only after bringing it into position at the
workpiece. Touching rotating parts, especially ro-
8
tating drill bits, discs or blades, etc. may lead to
injury.
k) When using the equipment, always lead the supply
cord, the extension cord and the water hose (if
applicable) away from the machine to the rear.
This will reduce the risk of tripping and falling over
the cord or hose while working.
l) Avoid skin contact with drilling slurry.
m) Wear protective gloves when changing core bits.
The core bit may become hot during use.
n) Children must be instructed not to play with the
machine.
o) The machine is not intended for use by children,
by debilitated persons or those who have received
no instruction or training.
p) WARNING: Some dust created by grinding, sand-
ing, cutting and drilling contains chemicals known
to cause cancer, birth defects, infertility or other
reproductive harm; or serious and permanent res-
piratory or other injury. Some examples of these
chemicals are: lead from lead-based paints, crys-
talline silica from bricks, concrete and other masonry
products and natural stone, arsenic and chromium
from chemically-treated lumber. Your risk from these
exposures varies, depending on how often you do
this type of work. To reduce exposure to these
chemicals, the operator and bystanders should
work in a well-ventilated area, work with ap-
proved safety equipment, such as respiratory pro-
tection appropriate for the type of dust generated,
and designed to filter out microscopic particles
and direct dust away from the face and body.
Avoid prolonged contact with dust. Wear protec-
tive clothing and wash exposed areas with soap
and water. Allowing dust to get into your mouth,
nose, eyes, or to remain on your skin may promote
absorption of harmful chemicals.
5.3.2 Power tool use and care
a) Secure the workpiece. Use clamps or a vice to
secure the workpiece. The workpiece is thus held
more securely than by hand and both hands remain
free to operate the machine.
b) Check that the core bits used are compatible with
the chuck system and that they are secured in the
chuck correctly.
c) Switch the machine off and unplug the supply
cord in the event of a power failure or interruption
in the electric supply. This will prevent accidental
restarting when the electric power returns.
5.3.3 Electrical safety
a) Before beginning work, check the working area
(e.g. using a metal detector) to ensure that no
concealed electric cables or gas and water pipes