Bosch Professional GSB 19-2 REA Manual Original página 23

OBJ_BUCH-763-001.book Page 23 Wednesday, October 22, 2008 10:47 AM
Replacing the Drill Chuck
Before any work on the machine itself, pull
the mains plug.
Removing the Drill Chuck (see figure D)
Disassemble the auxiliary handle and set the
gear selector 2 to the centre position between
the 1st and 2nd gear.
Insert a steel pin with a diameter of Ø 4 mm and
approx. 50 mm of length into the drill hole on
the spindle neck in order to lock the drill spin-
dle.
Clamp the short end of an Allen key 22 into the
keyless chuck 1.
Place the machine on a stable surface (e. g. a
workbench). Hold the machine firmly and loos-
en the keyless chuck 1 by turning the Allen key
22 in rotation direction . Loosen a tight-seated
keyless chuck by giving the long end of the Allen
key 22 a light blow. Remove the Allen key from
the keyless chuck and completely unscrew the
keyless chuck.
For machines with key chuck, disassembly is
carried out analogous as described above.
For machines with keyless chuck, an open-end
spanner (size 19 mm) can be applied to the drill
chuck instead of an Allen key.
Mounting the Drill Chuck (see figure E)
The keyless chuck/key type drill chuck is mount-
ed in reverse order.
Remove the steel pin from the drill hole on
the spindle neck after mounting is complet-
ed.
The drill chuck must be tightened with a
tightening torque of approx. 50–55 Nm.
Dust/Chip Extraction
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.
Bosch Power Tools
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.
– Use dust extraction whenever possible.
– 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.
Use the dust/chip extraction only when
working concrete, brick and brickwork.
Wood or plastic chips can easily lead to clog-
ging.
WARNING Fire hazard! Do not work metal-
lic materials with the extraction device
mounted. Hot metal chips can ignite parts of
the extraction device.
Note: Do not use the dust extraction 13 when
screwdriving or cutting threads.
The dust extraction 13 retracts while working,
so that the dust collector is always kept close to
structural surface being drilled. The dust extrac-
tion automatically switches on and off with the
power tool.
To achieve optimum extraction results, please
observe the following notes:
– The application tool being used may not
project beyond the dust collector 16.
– Pay attention that the extraction device faces
flush against the workpiece or the wall. This
also makes drilling at a right angle easier.
– When using the extraction device, always
work with the maximum speed.
– After reaching the desired drilling depth, pull
the drill bit out of the drill hole first and then
switch off the impact drill.
– Check the condition of the filter element 24
regularly. Replace a damaged filter element
immediately.
2 609 932 653 | (22.10.08)
English | 23