Dust/Chip Extraction; Auxiliary Handle - Bosch PEX 420 AE Manual Original

Replacing the Sanding Plate
Note: Replace a damaged sanding plate 7 imme-
diately.
Pull off the sanding sheet or polishing tool.
Completely unscrew the screw 5 and take off
the sanding plate 7. Attach the new sanding
plate 7 and tighten the screw again.
Note: When attaching the sanding plate, pay
attention that the toothing of the drive element
engage into the openings of the sanding plate.
Note: A damaged sanding-plate base may be
changed only by an authorised after-sales serv-
ice agent for Bosch power tools.

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.
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.
Integrated Dust Extraction with Dust Box
(see Fig. A1 – A4)
Before assembling the dust box 4, pull out the
plastic slider 12. Place the dust box 4 onto the
extraction outlet 13 and allow it to engage.
Make sure that the plastic slider 12 engages in
the holder 11.
To empty the dust box 4, press the latching le-
vers 14 on the side of the dust box. Pull off the
dust box.
Bosch Power Tools
Before opening the dust box 4, it is recommend-
ed to loosen the dust from the filter element by
gently striking it against a firm support (as shown
in the figure).
Grasp the dust box 4 by the recessed grip, fold
the filter element 15 upward and empty the dust
box. Clean the thin plates of the filter element
15 with a soft brush.
Note: To ensure optimum dust extraction, emp-
ty the dust box 4 in good time and clean the fil-
ter element 15 at regular intervals.
When working vertical surfaces, hold the power
tool in such a manner that the dust box 4 faces
downward.
External Dust Extraction (see figure B)
Slide the extraction adapter 16 onto the outlet
piece 13. Ensure that the latching levers of the
extraction adapter engage. The extraction
adapter 16 accepts a vacuum hose with a diam-
eter of 19 mm.
The vacuum cleaner must be suitable for the ma-
terial being worked.
An overview for connecting to different vacuum
cleaners can be found at the end of these oper-
ating instructions.
When vacuuming dry dust that is especially det-
rimental to health or carcinogenic, use a special
vacuum cleaner.
When working vertical surfaces, hold the power
tool in such a manner that the vacuum hose fac-
es downward.
For removal of the extraction adapter 16, press
the latching levers together at the rear and pull
the extraction adapter off.

Auxiliary Handle

The auxiliary handle 8 enables convenient han-
dling and optimal distribution of power, espe-
cially at high removal rates.
Loosen the wing bolt 9 and pivot the auxiliary
handle to the requested position. Make sure
that it engages in the casing and tighten the
wing bolt 9 again.
English | 19
1 609 929 S55 | (23.3.09)