Hilti DD 120 Operating Instructions Manual page 32

5.1.3 Mechanical
a) Follow the instructions concerning care and main-
tenance.
en
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) Make sure that the cover with built-in end stop
is always fitted to the drill stand. The safety-
relevant end-stop function becomes inoperative
if this component is not fitted.
5.1.4 Electrical
a) Protect yourself from electric shock. Avoid body
contact with earthed or grounded surfaces such
as pipes, radiators, ranges and refrigerators.
b) 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.
c) Check the condition of the machine and its ac-
cessories. Do not operate the machine and its
accessories if damage is found, if the machine is
incomplete or if its controls cannot be operated
faultlessly.
d) Do not touch the supply cord or extension cord
if it is damaged while working. Disconnect the
supply cord plug from the power outlet.
e) Damaged or faulty switches must be replaced at
a Hilti service center. Do not use the machine if it
cannot be switched on and off correctly.
f) Have the machine repaired by an electrical spe-
cialist (Hilti Service) using genuine Hilti spare
parts. The users may otherwise be exposed to
potential hazards.
g) Do not use the supply cord for purposes for which
it is not intended. Never carry the machine by the
supply cord. Never pull the plug out of the power
outlet by pulling the supply cord.
28
h) Do not expose the supply cord to heat, oil or sharp
edges.
i) When working outdoors, use only extension cords
that are approved and correspondingly marked
for this application.
j) In case of an interruption in the electric supply:
Switch the machine off and unplug the supply
cord.
k) Avoid using extension cords with multiple power
outlets and the simultaneous use of several elec-
tric tools or machines connected to one extension
cord.
Never operate the machine when it is dirty or
l)
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.
5.1.5 Thermal
Wear protective gloves when changing core bits. The
core bit may become hot during use.
5.1.6 Requirements to be met by users
a) The machine is intended for professional use.
b) The machine may be operated, serviced and re-
paired only by authorized, trained personnel. This
personnel must be informed of any special haz-
ards that may be encountered.
c) Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under
the influence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
d) Improve the blood circulation in your fingers by
relaxing your hands and exercising your fingers
during breaks between working.
5.1.7 Personal protective equipment
The user and any other persons in the vicinity must
wear suitable eye protection, a hard hat, ear protec-
tion, protective gloves and safety footwear while the
machine is in use.