Dust Extraction; Maintenance - Bosch 11321EVS Operating/Safety Instructions Manual

2610048700.qxp_11321evs 10/4/17 12:40 PM Page 10
For selection of dust collection systems and
operating instructions, see the Operating /
Safety Instructions for 'Dust Extraction
orized per so n nel may result in misplacing
of internal wires and components which
could cause
recommend that all tool service be performed
by a Bosch Factory Service Center or Autho -
rized 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 (Fig. 8).
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 brush es be examined.
Only genuine Bosch replace ment brushes
specially designed for your tool should be used.
BEARINGS
After about 300-400 hours of operation, or at
every second brush change, the bearings

Dust Extraction

Maintenance

Service
Preventive maintenance
performed by unauth -
serious hazard.
Attachments for Hammers and Hammer Drills'
included with your tool or with the dust
extraction attachment.
should be replaced at Bosch Factory Service
Center or Au thorized 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.
We
REPLACEMENT OF CORD AND
CARBON BRUSHES
Your tool is designed to provide a qualified
service technician optimal access to replace
the carbon brushes and the cord. This
provides the service technician the ability to
replace these components without the need of
disassembling the entire tool housing.
tool from the power supply before cleaning
or performing any main tenance. The tool
may be cleaned most effectively with
compressed dry air. Always wear safety gog -
gles when cleaning tools with compressed
air.
Ventilation openings and switch levers must be
kept clean and free of foreign matter. Do not
at tempt to clean by inserting pointed objects
through openings.
plastic parts. Some of these are: gasoline,
carbon tetrachlo ride, chlo rinated cleaning
solvents, ammonia and house hold detergents
that contain ammonia.
-10-
Cleaning
To avoid accidents
always dis connect the
Certain cleaning agents
and sol vents damage