Bosch Professional GBH 18V-28 DC Original Instructions Manual page 20

20 | English
Do not continue to press the On/Off switch after the
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power tool has automatically switched off. The battery
can be damaged.
Follow the instructions on correct disposal.
Removing the battery
The battery (8) is equipped with two locking levels to pre-
vent the battery from falling out if the battery release
button (16) is pressed unintentionally. As long as the bat-
tery is inserted in the power tool, it is held in position by
means of a spring.
– To remove the battery (8), press the release button (16)
and pull the battery out of the power tool. Do not use
force to do this.
Battery charge indicator
The green LEDs on the battery charge indicator indicate the
state of charge of the battery. For safety reasons, it is only
possible to check the state of charge when the power tool is
not in operation.
Press the button for the battery charge indicator or
show the state of charge. This is also possible when the bat-
tery is removed.
If no LED lights up after pressing the button for the battery
charge indicator, then the battery is defective and must be
replaced.
Battery model GBA 18V...
LEDs
3× continuous green light
2× continuous green light
1× continuous green light
1× flashing green light
Battery model ProCORE18V...
LEDs
5× continuous green light
4× continuous green light
3× continuous green light
2× continuous green light
1× continuous green light
1× flashing green light
Auxiliary handle
Do not operate your power tool without the auxiliary
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handle (15).
1 609 92A 5SL | (26.11.2021)
Swivelling the auxiliary handle (see figure A)
You can swivel the auxiliary handle (15) to any angle for a
safe work posture that minimises fatigue.
– Turn the lower gripping end of the auxiliary handle (15)
anticlockwise and swivel the auxiliary handle (15) into
the required position. Then turn the lower gripping end of
the auxiliary handle (15) clockwise to retighten it.
Make sure that the retaining strap of the auxiliary handle
slots into the corresponding groove of the housing.
Selecting Drill Chucks and Tools
Hammer drilling and chiselling require SDS-plus application
tools that are inserted into the SDS-plus drill chuck.
For drilling without impact in wood, metal, ceramic and
plastic as well as for screwdriving, tools without SDS‑plus
are used (e.g. cylindrical shank drill bits). For these tools, a
keyless chuck or a keyed chuck are required.
Inserting/removing the keyed chuck
Fitting the keyed chuck (see figure B)
to
– Screw the SDS-plus shank (20) into a keyed chuck (19).
Secure the keyed chuck (19) using the securing screw
(18). Note that the securing screw has a left-hand
thread.
Inserting the keyed chuck (see figure B)
– Clean and lightly grease the insertion end of the shank.
– Insert the keyed chuck with the adapter shank into the
tool holder with a turning motion until it automatically
locks.
– Check that it is locked by pulling the keyed chuck.
Capacity
60−100 % Removing the keyed chuck
– Push the locking sleeve (4) back and remove the keyed
30−60 %
chuck (19).
5−30 %
0−5 %
Changing the Tool
The dust protection cap (3) largely prevents the penetration
of drilling dust into the tool holder during operation. When
inserting the tool, make sure that the dust protection cap (3)
does not become damaged.
Replace a damaged dust protection cap immediately.
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It is recommended that you have use an after-sales
Capacity
service for this.
80−100 %
60−80 % Changing the tool (SDS plus)
40−60 %
Inserting SDS-plus application tools (see figure C)
20−40 %
The SDS-plus drill chuck enables you to change the applica-
tion tool easily and conveniently without needing to use ad-
5−20 %
ditional tools.
0−5 %
– Clean and lightly grease the insertion end of the applica-
tion tool.
– Insert the application tool into the tool holder while turn-
ing it until it locks automatically.
– Check the latching by pulling the tool.
Bosch Power Tools