Hilti DD 160 Original Operating Instructions page 35

g) 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.
h) Avoid skin contact with drilling slurry.
i) 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.
j) 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.
5.2.2 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.
Check that all the clamping screws are correctly
f)
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.
5.2.3 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 ma-
terials) 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.
f) 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
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.
5.2.4 Thermal
Wear protective gloves when changing core bits. The
core bit may become hot during use.
5.2.5 Requirements to be met by users
Improve the blood circulation in your fingers by re-
laxing your hands and exercising your fingers during
breaks between working.
en
29