Before Use - Hilti DD 150?U Operating Instructions Manual

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.
b) Never operate the machine without the supplied
GFCI ground fault circuit interrupter (machines
without GFCI: Never operate the machine without
an isolating transformer). Test the GFCI each time

before use.

c) Check the machine's supply cord at regular inter-
vals and have it replaced by a qualified specialist
if found to be damaged. If the machine's sup-
ply cord is damaged it must be replaced with
a specially-prepared supply cord available from
Hilti Customer Service. Check extension cords at
regular intervals and replace them if found to be
damaged. Do not touch the supply cord or exten-
sion cord if damaged while working. Disconnect
the supply cord plug from the power outlet. Dam-
aged supply cords or extension cords present a risk
of electric shock.
5.3.4 Work area
a) Ensure that the workplace is well ventilated. Ex-
posure to dust at a poorly ventilated workplace may
result in damage to the health.
6 Before use
CAUTION
The mains voltage must comply with the specification
given on the type identification plate. Ensure that the
power tool is disconnected from the electric supply.
DANGER
When drilling through walls, cover the area behind
the wall, as material or the core may fall out on the
other side of the wall. When drilling through ceilings,
secure (cover) the area below as drilled material or
the core may drop out and fall down.
DANGER
Check that the drill stand is securely fastened to the
work surface.
CAUTION
Do not break the connection to earth by using an
adaptor plug.
b) 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.
c) Approval must be obtained from the site engineer
or architect prior to beginning drilling work. Drilling
work on buildings and other structures may influence
the statics of the structure, especially when steel
reinforcing bars or load-bearing components are cut
through.
d) It is recommended that rubber gloves and non-
skid shoes are worn when working outdoors.
5.3.5 Personal protective equipment
The user and any other persons in the vicinity must
wear ANSI Z87.1-approved eye protection, a hard
hat, ear protection, protective gloves and breathing
protection while the machine is in use.
6.1 Preparing for use
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.
6.1.1 Adjusting the side handle 4
1. Release the side handle.
2. Pivot the side handle into the desired position.
3. Tighten the side handle securely by turning its grip.
4. Check to ensure that the side handle is tightened
securely.
6.1.2 Adjusting the depth gauge (when using the
drill stand)
1. Set the depth gauge to the desired depth.
2. Secure the depth gauge by tightening the clamping
screw.
en
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