Bosch GBH Professional 5-38 D Original Instructions Manual page 18

OBJ_BUCH-273-002.book Page 18 Tuesday, June 22, 2010 11:24 AM
18 | English
Changing the Tool
With the SDS-max tool holder, simpler and eas-
ier tool changing is possible without additional
aids.
The dust protection cap 1 largely prevents the
entry of drilling dust into the tool holder during
operation. When inserting the tool, take care
that the dust protection cap 1 is not damaged.
A damaged dust protection cap should be
changed immediately. We recommend hav-
ing this carried out by an after-sales serv-
ice.
Inserting (see figure A)
– Clean and lightly grease the shank end of the
tool.
– Push back the locking sleeve 2 and insert the
tool in a twisting manner into the tool holder.
Release the locking sleeve 2 again in order to
lock the tool.
– Check the latching by pulling the tool.
Removing (see figure B)
– Push back the locking sleeve 2 and remove
the tool.
Dust/Chip Extraction
Dusts from materials such as lead-containing
coatings, some wood types, minerals and metal
can be harmful to one's health. Touching or
breathing-in the dusts can cause allergic reac-
tions and/or lead to respiratory infections of the
user or bystanders.
Certain dusts, such as oak or beech dust, are
considered as carcinogenic, especially in con-
nection with wood-treatment additives (chro-
mate, wood preservative). Materials containing
asbestos may only be worked by specialists.
– Provide for good ventilation of the working
place.
– It is recommended to wear a P2 filter-class
respirator.
Observe the relevant regulations in your country
for the materials to be worked.
1 609 929 V37 | (22/6/10)
Operation
Starting Operation
Observe correct mains voltage! The voltage
of the power 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 select-
ed with the mode selector switch 3.
Note: Change the operating mode only when the
machine is switched off! Otherwise, the ma-
chine can be damaged.
– Turn the mode selector switch 3 to the re-
quested position.
Position for hammer drilling in
concrete or stone
When the drilling tool does not im-
mediately 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 start the machine, press the On/Off
switch 4 and keep it pressed.
– To switch off the machine, release the
On/Off switch 4.
For low temperatures, the machine reaches the
full hammer/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.
Bosch Power Tools