Hilti DD 120 Operating Instructions Manual page 31

m) Do not allow other persons to touch the machine
or the extension cord.
n) Avoid unfavorable body positions. Make sure you
work from a safe stance and stay in balance at all
times.
o) Always lead the supply cord, extension cord and
water hose away from the tool or machine to the
rear to prevent a tripping hazard while working.
p) Keep the supply cord, extension cord, suction
hose and vacuum hose away from rotating parts.
q) CAUTION: Before beginning drilling, check that
there are no live electric cables located in the
base material.
r) Concealed electric cables or gas and water pipes
present a serious hazard if damaged while you
are working. Accordingly, check the area in which
you are working beforehand (e.g. using a metal
detector). External metal parts of the machine may
become live, for example, when an electric cable is
damaged accidentally.
s) Do not work from a ladder.
5.1.2 General safety rules
a) Use the right tool or machine for the job. Do not
use the tool or machine for purposes for which
it was not intended. Use it only as directed and
when in faultless condition.
b) Use the power tool, accessories and tool bits etc.
in accordance with these instructions, taking into
account the working conditions and the work to
be performed. Use of the power tool for opera-
tions different from those intended could result in a
hazardous situation.
c) Use only the genuine Hilti accessories or ancillary
equipment listed in the operating instructions. Use
of accessories or ancillary equipment not listed in the
operating instructions may present a risk of personal
injury.
d) Take the influences of the surrounding area into
account. Do not expose the machine to rain or
snow and do not use it in damp or wet conditions.
Do not use the machine where there is a risk of fire
of explosion.Electric tools and machines generate
sparks which may ignite dust or gas.
e) Keep the grips dry, clean and free from oil and
grease.
f) Do not overload the machine. It will work more
efficiently and more safely within its intended per-
formance range.
g) Do not force the power tool. Use the correct
power tool for your application. The correct power
tool will do the job better and safer at the rate for
which it was designed.
h) Never leave the machine unattended.
i) Store machines in a secure place when not in use.
When not in use, machines must be stored in a
dry, high place or locked away out of reach of
children.
j) Avoid unintentional starting. Check that the on /
off switch is in the off-position before plugging
the supply cord into the power outlet.
k) Always disconnect the supply cord from the elec-
tric supply when the machine is not in use (e.g.
during breaks between working), before making
adjustments, before carrying out care and main-
tenance and before changing core bits. This safety
precaution prevents the machine starting uninten-
tionally.
l) Never operate the machine without the supplied
PRCD (GB version: Never operate the machine
without an isolating transformer). Test the PRCD
each time before use.
m) Look after cutting tools carefully. Keep the cutting
tools sharp and clean. This will allow you to work
more efficiently and more safely.
n) Remove any adjusting key or wrench before turn-
ing the power tool on. A wrench or a key left at-
tached to a rotating part of the power tool may result
in personal injury.
o) Check the machine and its accessories for any
damage. Guards, safety devices and any slightly
damaged parts must be checked carefully to en-
sure that they function faultlessly and as inten-
ded. Check that moving parts function correctly
without sticking and that no parts are damaged.
All parts must be fitted correctly and fulfill all
conditions necessary for correct operation of the
machine. Damaged guards, safety devices and
other parts must be repaired or replaced properly
at an authorized service center unless otherwise
indicated in the operating instructions.
p) Avoid skin contact with drilling slurry.
q) Wear a protective mask during work that gen-
erates dust, e.g. dry drilling. Connect a dust re-
moval system. Drilling in materials hazardous to
the health (e.g. asbestos) is not permissible.
r) Dust from material such as paint containing lead,
some wood species, minerals and metal may be
harmful. Contact with or inhalation of the dust may
cause allergic reactions and/or respiratory diseases
to the operator or bystanders. Certain kinds of dust
are classified as carcinogenic such as oak and beech
dust especially in conjunction with additives for wood
conditioning (chromate, wood preservative). Material
containing asbestos must only be treated by special-
ists. Where the use of a dust extraction device is
possible it shall be used. To achieve a high level
of dust collection, use a suitable vacuum cleaner
of the type recommended by Hilti for wood dust
and/or mineral dust together with this tool. Ensure
that the workplace is well ventilated. The use of a
dust mask of filter class P2 is recommended. Fol-
low national requirements for the materials you
want to work with.
en
27