Maintenance - Bosch 1773AK - 10 Amp Concrete Surfacing Grinder Operating/Safety Instructions Manual

BM 3609929777 1/02 1/3/02
Hold the tool with both hands and apply the
diamond wheel flat on the work surface,
advancing the tool moderately back and
forth.
When removing coatings from work
surfaces, hold the tool at a slight angle to
the workpriece surface. Holding the tool at a
slight angle will not reduce the effect of the
dust extraction.
The dry diamond cup wheel included with
the tool is intended for hard materials.
A dull dry diamond cup wheel can be
sharpened with a abrasive material (e.g.,
chalky sand stone).
Service
Preventive maintenance
WARNING
!
performed by unauthorized
personnel may result in misplacing of
internal wires and components which
could cause serious
recommend that all tool service be
performed by a Bosch Factory Service
Center or Authorized Bosch Service Station.
SERVICE REMINDER LIGHT
When the service reminder light lights up or
blinks, this will indicate that the cut-out
carbon brushes will switch off the tool in
approximately 8 hours. After that period, the
light will go off and the tool will stop running.
The tool must then be sent to a service
center for service.
TOOL LUBRICATION
Your Bosch tool has been properly
lubricated and is ready to use. It is
recommended that tools with gears be
regreased with a special gear lubricant at
every brush change.
CARBON BRUSHES
The brushes and commutator in your tool
have been engineered for many hours of
dependable service. To maintain peak
efficiency of the motor, we recommend
every two to six months the brushes be
examined. Only genuine Bosch replacement
1:16 PM Page 9
Four different types of diamond grinding
wheels are available as optional accessories.
Refer to the chart for examples of their use.
Type of grinding wheel
Old/hard concrete,
Flooring, concrete,
lime plaster, abrasive
concrete, sand stone,
and asphalt
Thermoplastic protec-
tive coating
Granite, artificial stone,
universal concrete

Maintenance

brushes specially designed for your tool
should be used.
After about 300-400 hours of operation, or at
every second brush change, the bearings
hazard. We
should be replaced at Bosch Factory
Service Center or Authorized Bosch Service
Station. Bearings which become noisy (due
to heavy load or very abrasive material cut-
ting) should be replaced at once to avoid
overheating or motor failure.
WARNING
!
the power supply before cleaning or
performing any maintenance. The tool may
be cleaned
compressed dry air. Always wear safety
goggles when cleaning tools with
compressed air.
Ventilation openings and switch levers must
be kept clean and free of foreign matter. Do
not attempt to clean by inserting pointed
objects through openings.
CAUTION
!
parts. Some of these are: gasoline, carbon
tetrachloride, chlorinated cleaning solvents,
ammonia and household detergents that
contain ammonia.
-9-
DC DC DC DC
510 520 500 530
x
x
x
x
BEARINGS
Cleaning
To avoid accidents always
disconnect the tool from
most effectively with
Certain cleaning agents and
solvents damage plastic