Bosch Professional GRW 140 Original Instructions Manual page 7

Gear I:
Low speed range
Gear II:
High speed range
Switching on/off
To start the power tool, press the on/off switch (1). To lock
the on/off switch (1), press the lock on button (5) and re-
lease the on/off switch (1).
To switch off the power tool, press briefly on the on/off
switch (1) and then release it.
Adjusting the Speed
The required speed can be preselected with the speed
preselection thumbwheel (2) (even during operation).
The speed needed depends on the mixing material that is to
be mixed and the work conditions.
Soft start
The electronic soft start slowly increases the speed if the on/
off switch (1) is pressed. This prevents the mixing material
that is to be mixed from splashing.
Constant Electronic control
The constant electronic control keeps a constant speed
when at no load and under certain load conditions. This
guarantees a uniform performance.
Indicator for changing the carbon brush
The indicator for changing the carbon brush (9) blinks red
when the carbon brushes are worn. The carbon brushes
must be replaced. To do this, send the power tool to an au-
thorised after-sales service centre for Bosch power tools
(see "After-Sales Service and Application Service",
page 7).
Restart protection
The restart protection feature prevents the power tool from
uncontrolled starting after the power supply to it has been
interrupted.
To restart the tool, set the on/off switch (1) to the "off" posi-
tion and then switch the power tool on again.
Work instructions for mixing
Avoid splashing the material. Otherwise you could slip
u
and lose control of the power tool.
Bosch Power Tools
Avoid continuously operating the power tool at re-
u
duced speed. Otherwise the motor of the power tool
could overheat.
Selection of the mixer basket is dependent on the mixing
material that is to be mixed.
For mixing materials with low viscosity, e.g. emulsion paint,
varnishes, adhesive, grouting compound or cement slurry,
use a mixer basket with a left-hand spiral. The material is
moved from the top downwards in a mixer basket with a left-
hand spiral. The mixer basket is pushed upwards. Mixing ma-
terials with low viscosity are mixed in a way which minimises
splattering.
For mixing materials with high viscosity, e.g. ready-mixed
plaster, concrete, cement, screed, filler or epoxy resin, use a
mixer basket with right-hand spiral. The material is moved
from the bottom upwards in a mixer basket with a right-hand
spiral. The mixer basket works its way into the mixture. Mix-
ing materials with high viscosity are mixed thoroughly.
Move the power tool up and down when working. Clean the
mixer basket after use.
Store the power tool in a safe place. Ensure that it can-
u
not fall over. The power tool may become damaged if this
happens.
Maintenance and Service
Maintenance and Cleaning
Pull the plug out of the socket before carrying out any
u
work on the power tool.
To ensure safe and efficient operation, always keep
u
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.
After-Sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
In all correspondence and spare parts orders, please always
include the 10‑digit article number given on the nameplate
of the product.
Malaysia
Robert Bosch Sdn. Bhd.(220975-V) PT/SMY
No. 8A, Jalan 13/6
46200 Petaling Jaya
Selangor
Tel.: (03) 79663194
Toll-Free: 1800 880188
Fax: (03) 79583838
English | 7
1 609 92A 8ZX | (16.11.2023)