Bosch GTR 550 - Page 11

English | 11
Cause Corrective measure
Reduce the speed.
The removal rate of the material to be machined is too
high.
The drywall sander's speed is
too high.
Reduce the speed.
The suction effect on the dry-
wall sander is too strong.
Reduce the suction effect or
switch to external dust ex-
traction.
The bodyfiller material has a
high proportion of filler or is
very soft.
Switch on the external dust
extraction, set the suction
power thumbwheel to set-
ting6 and, in extreme cases,
reduce the speed.
The grit of the abrasive is too
coarse.
Use a sanding sheet with a
finer grit.
The surface quality is not optimal.
The grit of the abrasive is too
coarse.
Use a sanding sheet with a
finer grit.
The drying times for the
bodyfiller material have not
been observed.
Refer to the technical inform-
ation sheets and manufac-
turer's recommendations.
The suction effect is too
strong.
Reduce the suction power.
The bodyfiller material has a
high proportion of filler or is
very soft.
Use a sanding sheet with a
finer grit.
The running power tool has
been positioned on the sur-
face (scoring).
Position the power tool be-
fore switching it on.
Work on the surface and al-
ways work with the remov-
able brush segment.
There are sanding marks on the surface.
The hard sanding pad has
been positioned at an angle
on the surface.
Use a soft sanding pad with
an intermediate pad.
In the case of very soft body-
filler material, the sanding
pad is too hard or the grit of
the abrasive is too coarse.
Use a soft sanding pad with
an intermediate pad.
Choose a finer abrasive grit.
The suction effect is insufficient.
The suction power on the
dust extractor is too low.
Increase the suction power
on the dust extractor.
The drywall sander's speed is
too high.
Reduce the speed.
The internal dust extraction
on the drywall sander is too
low.
Reduce the suction power or
switch to external dust ex-
traction.
The bodyfiller material has a
high proportion of filler or is
very soft.
Switch on the external dust
extraction, set the suction
power thumbwheel to setting
Cause Corrective measure
6 and, in extreme cases, re-
duce the speed.
The main filter on the dust
extractor is blocked/
jammed.
Clean the filter element regu-
larly:
– Option 1: Set the suction
power regulation to the
maximum suction power.
Seal the nozzle, extraction
hose or intake port on the
dust extractor with the
palm of your hand for
10seconds until the auto-
matic cleaning starts.
– Option 2: Clean the filter
element mechanically (ex-
traction).
– Option 3: Check the filter
element for damage and
blockages. Insert a new
filter element regularly.
A fleece dust bag is being
used.
Use a waste disposal dust
bag.
The extraction hose is
blocked or twisted.
Remove the blockage or un-
twist the hose.
The dust extractor's dust
container is full.
Empty the dust extractor's
dust container.
Maintenance and Service
Maintenance and Cleaning
u Pull the plug out of the socket before carrying out any
work on the power tool.
u To ensure safe and efficient operation, always keep
the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
Changing the Connection Hose (see figureH)
To remove the connection hose (19), loosen the screw on
the hose clamp (23) with a screwdriver and lift the hose
clamp (23) off with the connection hose (19). Remove the
hose clamp(23). Pull out the inner housing (24) of the hose
mount (25) at the other end of the connection hose (19).
Hold the inner housing (24) in place and unscrew the con-
nection hose (19).
To insert a new connection hose (19), hold the inner hous-
ing (24) in place and screw in the new connection hose (19)
all the way. Fit the hose clamp (23) on the other side of the
connection hose (19). Position the screw head so that you
can tighten the hose clamp (23) effortlessly on the sanding
head (11) with a screwdriver with a torque of around 2Nm.
Bosch Power Tools 1 609 92A 76U | (25.02.2022)