Hilti DD 350-CA Mode D'emploi page 36

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.
4.2.3 Electrical
a) Check the machine's supply cord at regular inter-
en
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,
5 Preparation for core drilling
WARNING
While setting up the equipment, the core drilling machine
must be disconnected from the electric supply.
DANGER
Check that the drill stand is securely fastened to the work
surface.
CAUTION
The machine and the diamond core bit are heavy.
There is a risk of pinching parts of the body.
Wear a hard hat, protective gloves and safety boots.
NOTE
When carrying the drilling machine, use the carrying
handle and the grip protrusion provided.
5.1 Setting up the drill stand 5
These steps are necessary only if the parts of the drill
stand have been folded together.
1. Loosen the bolt at the top end of the brace and at
the pivoting joint at the bottom end of the rail.
2. Bring the rail into the vertical position.
3. Tighten the bolt at the top end of the brace and at
the pivoting joint at the bottom end of the rail.
4. CAUTION The protective end cap with built-in
end stop must be fitted at the top end of the
guide rail.
If the protective end cap with built-in end stop is not
already fitted, fit it now.
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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.
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.
4.2.5 Requirements to be met by users
a) Improve the blood circulation in your fingers by
relaxing your hands and exercising your fingers
during breaks between working.
b) Stay alert. Pay attention to what you are doing.
Approach the work with common sense. Do not
use the machine if you are not concentrating.
5.2 Fitting the hand wheel
The hand wheel can be fitted on the left-hand side or the
right-hand side of the carriage on two different shafts.
On both sides of the carriage, the upper shaft provides
a direct drive while the lower shaft drives the carriage
through reduction gearing.
1. Fit the hand wheel onto one of the two shafts on the
left-hand or right-hand side of the carriage.
2. Secure the hand wheel with the screw.
5.3 Fastening the drill stand with an anchor 6
WARNING
Use an anchor suitable for the material on which you
are working and observe the anchor manufacturer's
instructions.
NOTE
Hilti M16 metal expansion anchors are usually suitable for
fastening diamond core drilling equipment to uncracked
concrete. Under certain conditions it may be necessary
to use an alternative fastening method. Please contact
Hilti Technical Service if you have any questions about
secure fastening.