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20 | English
1 609 929 V00 | (17.11.09) Bosch Power Tools
Replacing the Drill Chuck
f Before any work on the machine itself, pull
the mains plug.
Removing the Securing Screw
The keyless chuck 1 as well as the key type drill
chuck 14 is secured with a securing screw 17
against unintentional loosening from the drill
spindle. Completely open the keyless chuck 1 or
the key type drill chuck 14 and unscrew the se-
curing screw 17 in clockwise direction. Please
note that the securing screw has a left-hand
thread.
If the securing screw 17 is seated tightly, apply
a screwdriver to the screw head and loosen the
securing screw by giving a blow onto the handle
of the screwdriver.
Dismounting the Key Type Drill Chuck
(see figure E)
To dismount the key type drill chuck 14, position
an open-end spanner 18 (size 17 mm) against
the spanner flats of the drive spindle.
Place the machine on a firm surface, e. g. a work
bench. Insert the chuck key 13 into one of the
three holes of the key type drill chuck 14 and
loosen the key type drill chuck 14 with this lever
by turning in anticlockwise direction. A tightly
seated key type drill chuck is is loosened with a
light blow on the chuck key 13. Remove the
chuck key 13 from the key type drill chuck and
completely unscrew it from the machine.
Dismounting the Keyless Chuck
To remove the keyless chuck 1, clamp an Allen
key into the keyless chuck 1 and position the
open-end wrench 18 (size 17) against the span-
ner flats of the drive spindle. Place the machine
on a firm surface, e.g. a workbench. Hold the
open-end wrench 18 firmly and loosen the key-
less chuck 1 by turning the Allen key in anti-
clockwise direction. A tightly sitting keyless
chuck is loosened with a light blow onto the
long end of the Allen key. Remove the Allen key
from the keyless chuck and completely unscrew
it from the machine.
Mounting the Drill Chuck
The keyless chuck/key type drill chuck is mount-
ed in reverse order.
The drill chuck must be tightened with a
tightening torque of approx. 15 Nm.
Screw securing screw 17 in anticlockwise direc-
tion into the open keyless/key type drill chuck.
Always use a new securing screw, as the thread-
locking compound on its thread loses its effect
after multiple usage.
Dust/Chip Extraction
f Dusts from materials such as lead-containing
coatings, some wood types, minerals and
metal can be harmful to one’s health. Touch-
ing or breathing-in the dusts can cause aller-
gic reactions and/or lead to respiratory infec-
tions of the user or bystanders.
Certain dusts, such as oak or beech dust, are
considered as carcinogenic, especially in
connection with wood-treatment additives
(chromate, wood preservative). Materials
containing asbestos may only be worked by
specialists.
Provide for good ventilation of the work-
ing place.
It is recommended to wear a P2 filter-
class respirator.
Observe the relevant regulations in your
country for the materials to be worked.
Operation
Starting Operation
f Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V
can also be operated with 220 V.
Reversing the Rotational Direction
(GBM 10-2 RE/GBM 13-2 RE)
The rotational direction switch 7 is used to re-
verse the rotational direction of the machine.
However, this is not possible with the On/Off
switch 6 actuated.
OBJ_DOKU-5396-002.fm Page 20 Tuesday, November 17, 2009 11:46 AM
20


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