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Bosch GTR55-85 Consignes D'utilisation/De Sécurité page 17

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Adjusting Suction Power
(Fig. 1)
You can adjust the suction power to achieve your preferred
balance between sanding speed and suction power. This is
only possible when the Suction Power Adjusting Lever 13 is
set to position 3. (See the table "Adjusting the Internal/Exter-
nal Airflow" below.)
Adjust the suction power with the Thumbwheel 1:
• 1−5: Low to high suction power, suitable for sanding
ceilings
• 6: Highest suction power, suitable for sanding walls
Start with a low suction power (position 1) and increase slow-
ly, until there is a noticeable contact pressure.
High suction power allows low-fatigue sanding of ceilings and
walls. An excessively high suction power can cause the power
tool to vibrate, which can make handling more difficult.
switch position
type of airflow
1 - External airflow
2 - Mixed external and internal airflow
3 - Mixed external and internal airflow
Dry Wall Sander Operation
Changing the Connection Hose
(Fig. 9)
Removing the Connection Hose
To remove the Connection Hose 19, loosen the screw on the
Hose Clamp 24 with a screwdriver and lift the Hose Clamp 24
off with the Connection Hose 19. Remove the Hose Clamp
24. Pull out the Inner Housing 25 of the Hose Mount 26 at the
other end of the Connection Hose 19.
Hold the Inner Housing 25 in place and unscrew the Connec-
tion Hose 19.
Inserting a New Connection Hose
To insert a new Connection Hose 19, hold the Inner Hous-
ing 25 in place and screw in the new Connection Hose 19 all
the way. Fit the hose Hose Clamp 24 on the other side of the
Connection Hose 19. Position the screw head so that you can
tighten the Hose Clamp 24 effortlessly on the Sanding Head
11 with a screwdriver with a torque of around 17.7 Lbf-in
(2 Nm).
Adjusting the Internal/External Airflow
use
Ideal for sanding walls at high sanding speeds without
vacuum suction.
Medium sanding performance with low vacuum suction.
Ideal for sanding ceilings at low sanding speeds but with
high vacuum suction.
-17-

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