Hilti DD 350-CA Manual De Instrucciones página 16

extension cable. Keep these persons away from
the working area.
f) Children must be instructed not to play with the
machine.
g) The machine is not intended for use by children,
by debilitated persons or those who have received
en
no instruction or training.
h) Never operate the machine without the supplied
PRCD (machines without PRCD: Never operate
the machine without an isolating transformer).
Test the PRCD each time before use.
i) Tampering with or modification of the machine, drill
stand and accessories is strictly prohibited.
j) 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 intended.
Check that moving parts function correctly with-
out sticking and that no parts are damaged. All
parts must be fitted correctly and fulfill all condi-
tions necessary for correct operation of the ma-
chine. Damaged guards, safety devices and other
parts must be repaired or replaced properly at an
authorized service center unless otherwise indi-
cated in the operating instructions.
k) Regularly check the hoses for damage and make
sure that the maximum permissible water supply
pressure of 6 bar is not exceeded.
l) Avoid skin contact with drilling slurry.
m) 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.
n) 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.
o) 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.
p) Check that all core bits are in good condition
before use. Do not use deformed or damaged
core bits.
q) When drilling, always maintain a safe distance
from the core bit and do not touch any rotat-
ing parts. Always unplug the supply cord before
8
touching or making any adjustments to the core
bit.
4.2.2 Mechanical
a) Follow the instructions concerning care and main-
tenance.
b) Follow the instructions concerning lubrication
and changing core bits.
c) Check that the core bits used are compatible with
the chuck system and that they are secured in the
chuck correctly.
d) Make sure that the machine is correctly and se-
curely mounted on the drill stand.
e) Do not touch rotating parts.
f) Check that all the clamping screws are correctly
tightened.
g) As the end stop has a safety-relevant function,
always check to ensure that the end stop screw
is securely in place on the drill stand.
4.2.3 Electrical
a) Check the machine's supply cord at regular inter-
vals and have it replaced by a qualified specialist
if found to be damaged. Check extension cords
at regular intervals and replace them if found to
be damaged.
b) Do not touch the supply cord or extension cord
if it is damaged while working. Disconnect the
supply cord plug from the power outlet.
c) In case of an interruption in the electric supply:
Switch the machine off and unplug the supply
cord.
d) Avoid using extension cords with multiple power
outlets and the simultaneous use of several elec-
tric tools or machines connected to one extension
cord.
e) Never operate the machine when it is dirty or
wet. Dust (especially dust from conductive mate-
rials) or dampness adhering to the surface of the
machine may, under unfavorable conditions, lead
to electric shock. Dirty or dusty machines should
thus be checked at a Hilti service center at regular
intervals, especially if used frequently for working
on conductive materials.
Before beginning work, check the working area
f)
(e.g. using a metal detector) to ensure that no
concealed electric cables or gas and water pipes
are present. External metal parts of the machine may
become live, for example, when an electric cable is
damaged accidentally. This presents a serious risk of
electric shock.
g) Before beginning drilling, check that there are
no live electric cables present in the area where
drilling is to take place.
4.2.4 Thermal
Wear protective gloves when changing core bits. The
core bit may become hot during use.