Bosch GTR Professional 550 Original Instructions Manual page 16

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16 | English
Medium-hard
– High material removal rate, ideal for
sanding pad
hard plaster and removing old wall
paints
(2 608 000 764)
– For use on flat surfaces
– Optimal suction support makes work
easier when using a dust extractor.
A) Standard scope of delivery
Changing the Intermediate Pad (see figure A)
An intermediate pad (15) must always be used when work-
ing with the soft sanding pad (part of standard items in-
cluded).
To remove the intermediate pad (15), lift it from the side
and pull it off the sanding pad (17).
Remove dirt and dust from the sanding pad (17), e.g. with a
paintbrush, before attaching a new intermediate pad.
The surface of the sanding pad (17) is fitted with a hook-
and-loop fastening, allowing intermediate pads to be se-
cured quickly and easily.
Press the intermediate pad (15) firmly against the underside
of the sanding pad (17).
To ensure optimum dust extraction, make sure that the
punched holes in the intermediate pad (15) are aligned with
the drilled holes in the sanding pad (17).
Changing the Sanding Pad (see figure B)
Note: Replace damaged sanding pads (17) immediately.
Pull off the sanding sheet (14) and the intermediate
pad (15). Unscrew the screw (16) completely and remove
the sanding pad (17). Attach the new sanding pad (17) and
retighten the screw.
Note: When attaching the sanding pad, make sure that the
teeth of the catch mate with the recesses in the sanding pad.
Note: Damaged sanding pads must only be replaced by an
after-sales service centre authorised to work with Bosch
power tools.
Inserting/Removing the Extension Tube
(see figures C–D)
Only use the extension tubes (10) if necessary. The effort re-
quired for the sanding is significantly lower when working
without extension tubes.
Note: A maximum of two extension tubes may be inserted.
Undoing the Connection between Sanding Head/Handle
Section/Extension Tube (see figure C):
– ➊ Open the clamping lever (9).
– ➋ Open the safety hook (8).
– ➌ Pull the previously connected parts apart.
Fastening the Connection between Sanding Head/
Handle Section/Extension Tube (see figure D):
– ➍ Slide the sanding head (11), handle section (7) and/or
extension tubes (10) into each other depending on the
required connection.
– ➎ Close the safety hook (8).
1 609 92A 7KA | (28.03.2022)
– ➏ Push the clamping lever (9) until it is at a right angle to
the sanding head (11), handle section (7) or extension
tube (10).
– ➐ Firmly tighten the eccentric screw (21).
– ➑ Close the clamping lever (9).
Always check that all the connection elements are secured
with the safety hooks (8) and clamping levers (9) and are
firmly attached.
Dust/chip extraction
Dust from materials can be harmful to health. Touching or
breathing in this dust can trigger allergic reactions and/or
cause respiratory illnesses in the user or in people in the
near vicinity.
Certain dusts are classified as carcinogenic.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
– Always wear a P2 filter class breathing mask.
External dust extraction
Attach the dust extraction hose (5) to the extraction
outlet (6) on the handle section (7).
Connect the dust extraction hose (5) to an extractor (ac-
cessory).
The dust extractor must be suitable for the material being
worked.
When extracting dry dust that is especially detrimental to
health or carcinogenic, use a special dust extractor.
For large surfaces, use the GAS 35 L/M AFC or GAS 55 L/
M AFC dust extractor since these models guarantee the con-
tinuous suction power required.
When working on vertical surfaces, hold the power tool with
the dust extraction hose facing downwards.
Installing/Removing the Hose/Cable Clip (see figure E)
Place the hose/cable clip (22) over the extraction hose (5).
Insert the power cable into the cable groove of the hose/
cable clip.
To remove the hose/cable clip (22), pull it off the extraction
hose (5) and remove the power cable from the hose/cable
clip.
Operation
Starting Operation
Pay attention to the mains voltage. The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Preselecting the Speed
You can preselect the required speed using the speed
preselection thumbwheel (2), even during operation. The
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