Care And Maintenance - Hilti SF 144-A Operating Instructions Manual

7.6.2 Hammer drilling
1. Move the forward / reverse switch to the "Forward"
position.
2. Turn the torque and operating mode setting ring to
the hammer drilling symbol.
7.6.3 Removing the drill bit
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Open the quick-release chuck.
3. Pull the insert tool out of the chuck.
7.7 Screwdriving
7.7.1 Fitting the bit / bit holder
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Insert the bit adapter in the chuck and then turn the
chuck sleeve until tight.
3. Check that the bit adapter is held securely (check
by pulling).
4. Fit the bit in the bit holder.

8 Care and maintenance

CAUTION
Before beginning cleaning, remove the battery from
the power tool in order to prevent unintentional start-
ing.
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.
8.2 Care of the power tool
CAUTION
Keep the power tool, especially its grip surfaces,
clean and free from oil and grease. Do not use clean-
ing agents which contain silicone.
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.
7.7.2 Screwdriving
1. Set the forward / reverse switch to the desired
direction of rotation.
2. Turn the torque and operating mode setting ring to
the desired torque value.
7.7.3 Removing the bit / bit holder
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Remove the bit from the bit holder.
3. Open the quick-release chuck.
4. Remove the bit holder from the chuck.
7.8 Reading the charge status LED display on
Li‑ion batteries 7
NOTE
The charge status cannot be indicated while the power
tool is in operation. Indication is given (LED 1 blinks) only
when the battery is fully discharged or when it is too hot
(temperature above 80°C).
The Li-ion battery features a charge status LED display.
The charge status is indicated by the LEDs on the battery
during charging (please refer to the operating instructions
for the charger). When the battery is at rest (not in use),
its charge status is indicated by the four LEDs on the
battery for a time of three seconds after pressing one of
the battery release buttons.
8.3 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 discharging
the battery as soon as a significant drop in performance
is noticed.
NOTE
If use of the power tool continues, further battery dis-
charge 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 negative
effect on battery life.
- Charging can be started at any time with no negative
effect on 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.
en
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