User Manual

English | 13
Bosch Power Tools 1 609 92A 2E0 | (13.9.16)
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Switching On and Off
–To start the machine, press the On/Off switch 6 at the top
(I) until it locks.
–To switch off the machine, press the On/Off switch 6 at
the bottom (0) and release it.
For low temperatures, the power tool reaches the full ham-
mer/impact capacity only after a certain time.
To save energy, only switch the power tool on when using it.
Setting the Speed/Impact Rate
The electronic control enables stepless speed and impact
preselection in accordance with the material to be worked.
The constant electronic control keeps the preselected speed
and impact rate nearly constant between no-load and load
conditions.
Select the speed with the thumbwheel 7 according to the ma-
terial.
When plugging the plug into the socket outlet or after a power
failure, the constant electronic control automatically sets the
highest speed and impact rate. This ensures working at opti-
mum performance despite too low preadjustment of the
thumbwheel 7.
The data in the following table are recommended values.
Changing the Chiselling Position (Vario-Lock)
The chisel can be locked in 12 positions. In this manner, the
optimum working position can be set for each application.
– Insert the chisel into the tool holder.
– Push the chisel adjustment ring 3 forward and turn the
chisel to the required position with the chisel adjustment
ring 3.
– Release the chisel adjustment ring 3 and turn the chisel un-
til it latches.
Working Advice
 Before any work on the machine itself, pull the mains
plug.
Vibration Damper
The integrated vibration damper in the main handle and at the
hammer mechanism reduces occurring vibrations.
Maintenance and Service
Maintenance and Cleaning
 Before any work on the machine itself, pull the mains
plug.
 For safe and proper working, always keep the machine
and ventilation slots clean.
 A damaged dust protection cap should be changed im-
mediately. We recommend having this carried out by
an after-sales service.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
Service Indicator 8
When the carbon brushes are worn out, the machine switches
itself off. This is indicated approx. 8 hours beforehand by the
lighting or blinking of the service indicator 8. The machine
must then be sent to an after-sales service agent. Addresses
are listed in the Section “After-sales Service and Application
Service”.
Stand-by Indicator 9
When the mains plug is plugged in and mains voltage is given,
the stand-by indicator 9 must be lit. When the machine can-
not be switched on despite lit stand-by indicator 9, it must be
sent to an after-sales service agent; for addresses, see sec-
tion “After-sales Service and Application Service”, page 13.
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. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch’s application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the nameplate of
the product.
Application Thumb-
wheel 7
Working roughcast/light building materials
Removing tiles
Working brick
Working concrete
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