Maintenance And Cleaning - Bosch GWS 20-180 H Instructions D'emploi

Cutting Stone
The machine must be used only for dry
cutting/grinding.
Operate the machine with dust extraction only. In
addition, wear a dust mask.
Slide the machine with moderate advancing that
is adapted to the material to be worked (Figure).
For cutting especially hard material, e. g., con-
crete with high gravel content, the diamond cut-
ting disc can overheat and become damaged as
a result. This is indicated clearly by a ring of
sparks that rotates with the diamond cutting disc.
In this case, interrupt the cutting process and al-
low the diamond cutting disc to cool by running
frely at no-load speed for a short time.
Noticeable decreasing work progress and a rotat-
ing spark ring are indications of a diamond cutting
disc that has become dull. With brief cuts in an
abrasive material (e. g., chalky sand stone), it
can be sharpened again.
20 • 1 609 929 C69 • TMS • 21.08.01
It is best to use a
diamond cutting disc.
As a safety measure
against jamming, use
the cutting guide 23
with the special dust
extraction wheel
guard.
The vacuum cleaner
must be approved for
the extraction of ma-
sonry dust.
Bosch provides suit-
able vacuum clean-
ers.
Switch on the ma-
chine and place the
front part of the cut-
ting guide on the
workpiece.
English - 7
Rotating the Machine Head
Before any work on the machine itself, pull
the mains plug.
with the cutting guide 23/cut-off stand 25 (op-
tional extra) or for left-handed persons.
Unscrew completely the four screws.
Rotate the machine head carefully and without
removing from the housing to the new position.
Screw in the screws again and tighten.

Maintenance and Cleaning

Before any work on the machine itself, pull
the mains plug.
For safe and proper working, always keep
the machine and the ventilation slots clean.
In extreme working conditions, conductive
dust can accumulate in the interior of the
machine when working with metal. The
protective insulation of the machine can be
degraded. The use of a stationary extrac-
tion system is recommended in such cases
as well as frequently blowing out the venti-
lation slots and installing a residual current
device (RCD).
If the machine should fail despite the care taken
in manufacturing and testing procedures, repair
should be carried out by an authorized after-sales
service centre for Bosch power tools.
In all correspondence and spare parts orders,
please always include the 10-digit order number
given on the nameplate of the machine.
The machine head
can be rotated with
respect to the ma-
chine housing in 90°
steps. In this man-
ner, the On/Off
switch can be
brought to an advan-
tageous handling
position for special
working situations,
e. g., for cutting work