Care And Maintenance - Hilti DD 110-W Manual De Instrucciones

7.6 Switching off
CAUTION
Wear protective gloves when changing cutting tools
as they get hot during use.
CAUTION
The core bit is full of dust or water and slurry. Work
from a secure stance and make sure you are ready
en
to support the additional weight of the drilled-out
material.
1. Remove the diamond core bit from the hole.
2. Switch the drilling machine off.
3. Connect the water flow regulator, if used.
7.7 Procedure in the event of the core bit sticking
In the event of the core bit sticking, the clutch will slip
until the user switches the power tool off. The core bit
can be released by taking the following action:
7.7.1 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 with a suitable open-end wrench
close to the connection end and release the core bit
by rotating it.
3. Plug the machine's supply cord into the power out-
let.

8 Care and maintenance

CAUTION
Disconnect the supply cord plug from the power out-
let.
8.1 Care of cutting tools and metal parts
Remove any dirt adhering to the surface of cutting tools,
the chuck and drive spindle and protect their surfaces
from corrosion by rubbing them with an oily cloth from
time to time.
Always keep the connection end clean and lightly
greased.
8.2 Care of the machine
CAUTION
Keep the machine, especially its grip surfaces, clean
and free from oil and grease. Do not use cleaning
agents which contain silicone.
The outer casing of the machine is made from impact-
resistant plastic.
Never operate the machine 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 machine. Clean the outside of the machine at regular
intervals with a slightly damp cloth. Do not use a spray,
steam pressure cleaning equipment or running water for
cleaning. This may negatively affect the electrical safety
of the machine.
30
4. Resume the drilling operation.
7.7.2 Using the hand wheel to release a core bit
(when using the drill stand)
1. Disconnect the supply cord plug from the power
outlet.
2. Release the core bit from the hole by turning it with
the hand wheel.
3. Plug the machine's supply cord into the power out-
let.
4. Resume the drilling operation.
7.8 Dismantling
CAUTION
Disconnect the supply cord plug from the power out-
let.
1. For instructions on removing the diamond core bit,
please refer to the section "Removing the diamond
core bit".
2. Remove the core if necessary.
7.9 Transport and storage
Open the water flow regulator before putting the power
tool into storage.
CAUTION
When temperatures drop below zero, check to ensure
that no water remains in the power tool.
8.3 Maintenance
WARNING
Repairs to the electrical section of the machine may
be carried out only by trained electrical specialists.
Check all external parts of the power tool for damage
at regular intervals and check that all controls operate
faultlessly. Do not operate the power tool if parts are
damaged or when the controls do not function faultlessly.
If necessary, the power tool should be repaired by Hilti
Service.
8.4 Replacing the carbon brushes 8
NOTE
The indicator lamp with wrench symbol lights up when
the carbon brushes need to be replaced.
DANGER
The machine may be operated, serviced and repaired
only by trained, authorized personnel. This personnel
must be specially informed of any possible hazards.
Failure to observe the following instructions may result in
contact with dangerous electric voltage.
1. Disconnect the machine from the electric supply.
2. Open the carbon brush covers on the left-hand and
right-hand side of the motor.