Care And Maintenance - Hilti TE 7-A Operating Instructions Manual

8. Care and maintenance

CAUTION
Before beginning cleaning, remove the battery from
the power tool in order to prevent unintentional
starting.
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8.1 Care of insert tools
Clean off dirt and dust deposits adhering to the insert
tools and protect them from corrosion by wiping the
insert tools from time to time with an oil-soaked rag.
Check that the connection end of the insert tool is
clean and lightly greased. Clean it and grease it if
necessary.
8.2 Care of the power tool
The outer casing of the power tool is made from
impact-resistant plastic. Sections of the grip are made
from a synthetic rubber material.
Never operate the power 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 power tool. Clean the outside
of the power tool 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
power tool. Always keep the grip surfaces of the
power tool free from oil and grease. Do not use
cleaning agents which contain silicone.
8.3 Cleaning or replacing the dust shield
Clean the dust shield on the chuck with a dry, clean
cloth at regular intervals. Clean the sealing lip by
wiping it carefully and then grease it again lightly
with Hilti grease. It is essential that the dust shield
is replaced if the sealing lip is found to be damaged.
Push the tip of a screwdriver under the edge of the
dust shield and prise it out toward the front. Clean
the area of the chuck in contact with dust shield and
then fit a new dust shield. Press it in firmly until it
engages.
8.4 Care of the NiCd battery
Avoid entrance of moisture. Keep the electrical con-
tacts free from dust, oil and grease. If necessary, use
a clean cloth to clean the contact surfaces. Do not
continue to operate the power tool until the battery
28
is completely discharged as this may damage the
battery cells. Recharge the battery as soon as a drop
in performance is noticed.
NOTE
Please refer to the operating instructions for the
charger for further information about charging the
battery.
8.5 Care of the Li-ion battery
Avoid entrance of moisture.
Charge the battery fully before using it for the first
time.
In order to achieve maximum battery life, stop dis-
charging the battery as soon as a significant drop in
performance is noticed.
NOTE
If use of the power tool continues, further battery
discharge will be stopped automatically before the
battery cells suffer damage.
Charge the battery with the Hilti charger approved for
use with Li-ion batteries.
NOTE
- A conditioning charge (as is required with NiCd or
NiMH batteries) is not necessary.
- Interruption of the charging procedure has no neg-
ative effect on battery life.
- Charging can be started at any time with no negative
effect battery life. There is no memory effect (as with
NiCd or NiMH batteries).
- For best results, batteries should be stored fully
charged in a cool dry place. Avoid charging the battery
in places subject to high ambient temperatures (e.g.
at a window) as this has an adverse effect on battery
life and increases the rate of self-discharge.
- If the battery no longer reaches full charge, it may
have lost capacity due to aging or overstressing. It
is possible to continue working with a battery in this
condition but it should be replaced in good time.
8.6 Maintenance
WARNING
Repairs to the electrical section of the power tool
may be carried out only by trained electrical spe-
cialists.