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power tool must then be switched off by the operator.
To release the core bit, proceed as follows:
Using an open-end wrench to release the core bit
1. Disconnect the supply cord plug from the power outlet.
2. Grip the core bit close to the connection end with a
suitable open-end wrench and rotate the core bit to
release it.
en
3. Plug the supply cord back into the power outlet.
Using the spider wheel to release the core bit
1. Disconnect the supply cord plug from the power out-
let.
2. Release the core bit by rotating it with the spider wheel.
3. Plug the supply cord back into the power outlet.
4. Continue the drilling operation.
8. Care and maintenance
Disconnect the supply cord plug from the socket.
Care of insert tools and metal parts
Remove any dirt adhering to the core bits and protect
their surfaces from corrosion by rubbing them with an
oily cloth from time to time.
8.1 Care of the machine
-CAUTION-
Keep the power tool, especially its grip surfaces, clean
and free from oil and grease. Do not use cleaning agents
which contain silicone.
The outer casing of the tool is made from impactresis-
tant plastic. Sections of the grip are made from a syn-
thetic rubber material. Never operate the tool when the
ventilation slots are blocked. Clean the ventilation slots
carefully using a dry brush. Do not permit foreign objects
to enter the interior of the tool. Clean the outside of the
tool at regular intervals with a slightly damp cloth. Do not
use a spray, steam pressure cleaning equipment or run-
ning water for cleaning. This may negatively affect the
electrical safety of the tool.
8.2 Maintenance
Check all external parts of the machine for damage at
regular intervals and check that all controls operate fault-
lessly. Do not operate the machine if parts are damaged
or when the controls do not function faultlessly. If nec-
essary, the machine should be repaired at a Hilti repair
center.
Repairs to the electrical section of the machine may be
carried out only by trained electrical specialists.
8.3 Replacing the carbon brushes
The indicator lamp with the wrench symbol lights when
the carbon brushes require to be replaced.
28
Printed: 22.11.2013 | Doc-Nr: PUB / 5069597 / 000 / 03
All manuals and user guides at all-guides.com
7.10 Transport and storage
-NOTE-
– Transport the drive unit, drill stand and diamond core
bit as separate units.
– Use the wheel assembly (accessory) to facilitate trans-
port.
– Open the water flow regulator before storing the pow-
er tool. Especially at temperatures below freezing, take
care to ensure that no water remains in the power tool
Failure to observe the following instructions may pre-
sent a possibility of coming into contact with a danger-
ous high voltage. The machine may be operated, ser-
viced and repaired only by authorized, trained person-
nel. This personnel must be informed of any special haz-
ards that may be encountered.
1. Disconnect the drive unit from the electric supply.
2. Remove the covers from the right and left sides of the
3. Remove the used carbon brushes from the drive unit.
4. Fit the new carbon brushes exactly as the old car-
5. Screw the covers back on to the right and left sides
8.4 Adjusting play between the column and the
The play between the column and the carriage can be
adjusted by way of 4 eccentrically-mounted rollers.
The 4 rollers shown in the illustration can be adjusted.
First remove the drive unit from the drill stand and run
the carriage up to the top of the column by turning the
hand wheel. The 4 rollers can then be adjusted as fol-
lows:
1. Use a 5 mm AF hex. socket wrench to unscrew the
2. Use a 19 mm AF open-end wrench to turn the eccen-
3. Tighten the locking screw.
8.5 Checking the equipment after care and mainte-
All functions must be checked after care and mainte-
nance.
drive unit.
Note how the brushes are fitted.
bon brushes (Spare part no.: 100–127 V: 279526;
220–240 V: 280097).
of the machine.
carriage
locking screw slightly (do not remove the screw).
tric axle, thus pushing the roller slightly toward the
column.
nance
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