Maintenance And Service; Maintenance And Cleaning - Bosch GBH 11 DE Professional Originalbetriebsanleitung

OBJ_BUCH-58-006.book Page 13 Monday, June 13, 2016 10:13 AM
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.
Setting the operating mode
The operating mode of the power tool is selected using the
mode selector switch 4.
Note: Change the operating mode only when the machine is
switched off! Otherwise, the machine can be damaged.
– Press and hold the release button 3 and turn the mode se-
lector switch 4 to the required position.
Position for hammer drilling
When the drilling tool does not immedi-
ately rotate upon switching on, allow the
machine to run slowly until the drilling
tool rotates.
Vario-Lock position for adjustment of
the chiselling position
Position for chiselling
Switching On and Off
To save energy, only switch the power tool on when using it.
– To start the machine, press the On/Off switch 5 and keep
it pressed.
– To switch off the machine, release the On/Off switch 5.
For low temperatures, the machine reaches the full ham-
mer/impact capacity only after a certain time.
This start-up time can be shortened by striking the inserted
tool insert against the floor one time.
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.
The maximum hammering capacity is achieved when the
thumbwheel 7 is set to position "6". For lower speed settings,
the hammering capacity is lower due to technical reasons.
– Select the speed with the thumbwheel 7 according to the
material.
Overload Clutch
 If the tool insert becomes caught or jammed, the drive
to the drill spindle is interrupted. Because of the forces
Bosch Power Tools
that occur, always hold the power tool firmly with both
hands and provide for a secure stance.
 If the power tool jams, switch the machine off and loos-
en the tool insert. When switching the machine on with
the drilling tool jammed, high reaction torques can oc-
cur.
Working Advice
 Before any work on the machine itself, pull the mains
plug.
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.
– Press and hold the release button 3 and turn the mode se-
lector switch 4 to the "Adjust chiselling position (Vario
lock)" position.
– Turn the tool holder to the desired chiselling position.
– Press and hold the release button 3 and turn the mode se-
lector switch 4 to the "Chiselling" position. The tool hold-
er is locked in this position.
 For chiselling, the mode selector switch 4 must always
be set to the position "Chiselling".

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".
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.
English | 13
1 609 92A 241 | (13.6.16)