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Operation
Starting Operation
f
Observe correct mains voltage! The voltage of
the power source must agree with the voltage
specified on the type plate of the power tool.
Switching On and Off
To
start
the power tool, press the On/Off switch
5
and
keep it pressed.
To
lock
the pressed On/Off switch
5
, push the lock-on
button
4
upward.
To
switch off
the power tool, release the On/Off
switch
5
or when it is locked with the lock-on button
4
,
briefly press the On/Off switch
5
and then release it.
For low temperatures, the power tool reaches the full
impact rate only after a certain time.
This start-up time can be shortened by striking the
chisel in the power tool against the floor one time.
Changing the Chiselling Position (Vario-Lock)
The chisel can be locked in 12 positions. In this man-
ner, 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 adjust-
ment ring
3
.
Release the chisel adjustment ring
3
and turn the chisel
until it latches.
Working Instructions
Sharpening Chisels (see figure C)
Good results are only achieved with sharp chisels;
therefore, sharpen the chiselling tools in good time.
This ensures a long service life of the tools and good
working performance.
Re-sharpening
Sharpen chiselling tools using grinding wheels (e. g.
ceramic bonded corundum wheel) with a steady supply
of water. Reference values are shown in the figure.
Take care that no annealing coloration appears on the
cutting edges; this impairs the hardness of the chisel-
ling tools.
For
forging
, heat the chisel to between 850 and
1050 °C (bright red to yellow).
For
hardening
, heat the chisel to approx. 900 °C and
quench in oil. Then anneal in an oven for approx. one
hour at 320 °C (annealing color = light blue).
Maintenance and Service
Maintenance and Cleaning
f
Before any work on the power tool itself, pull
the mains plug.
f
For safe and proper working, always keep the
power tool and the ventilation slots clean.
f
A damaged dust protection cap should be
changed immediately. We recommend having
this carried out by an after-sales service.
Lubrication
The power tool is oil-lubricated. An oil change is
required only within the scope of maintenance or repair
through an authorized after-sales service agent for
Bosch power tools. In this, it is absolutely required to
use the specified Bosch oil.
If the power tool should fail despite the care taken in
manufacturing and testing procedures, repair should
be carried out by an after-sales service center for
Bosch power tools.
In all correspondence and spare parts orders, please
always include the 10-digit article number given on the
type plate of the power tool.
Service and Customer Assistance
Exploded views and information on spare parts can be
found under:
www.bosch-pt.com
In case of a claim, repair or purchase of replacement
parts or in case of queries or other problems, please
contact your local dealer or Bosch representative.
People’s Republic of China
Website: www.bosch-pt.com.cn
China Mainland
Bosch Power Tools (China) Co., Ltd.
567, Bin Kang Road
Bin Jiang District 310052
Hangzhou, P.R.China
Service Hotline: . . . . . . . . . . . . . . . . . . 800 8 20 84 84
✆
. . . . . . . . . . . . . . . . . . . . . . . . +86 571 87 77 43 38
Fax . . . . . . . . . . . . . . . . . . . . . . . . +86 571 87 77 45 02
HK and Macau Special Administrative Regions
Melchers (H.K.) Ltd, Room 1210
Shun Tak Centre, West-Tower
168 – 200 Connaught Road, Central Hong Kong
Customer Service Hotline: . . . . . . . +852 25 89 15 61
Fax . . . . . . . . . . . . . . . . . . . . . . . . . . . +852 25 48 79 14
E-Mail: [email protected]
OBJ_BUCH-288-001.book Page 9 Friday, February 23, 2007 10:25 AM
