Starting Operation; Maintenance And Service; Maintenance And Cleaning - Bosch PBH 300 E Originalbetriebsanleitung

20 | English
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 selected
with the mode selector switch 6.
Note: Change the operating mode only when the
machine is switched off! Otherwise, the machine
can be damaged.
Press and hold the unlocking button 5 and turn
the mode selector switch 6 to the required posi-
tion.
Position for drilling without impact
in wood, metal, ceramic and plastic
Position for hammer drilling in con-
crete or stone
When the drilling tool does not im-
mediately rotate upon switching on,
allow the machine to run slowly un-
til 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 depressed.
To switch off the machine, release the On/Off
switch 4.
For low temperatures, the power tool reaches
the full hammer/impact capacity only after a cer-
tain time.
1 619 929 766 | (26.7.07)
Setting the Speed/Impact Rate
The speed/impact rate of the switched on power
tool can be variably adjusted, depending on how
far the On/Off switch 4 is pressed.
Light pressure on the On/Off switch 4 results in
low speed/impact rate. Further pressure on the
switch increases the speed/impact rate.
Overload Clutch
If the tool insert becomes caught or jammed,
the drive to the drill spindle is interrupted.
Because of the forces 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 loosen the tool insert. When switch-
ing the machine on with the drilling tool
jammed, high reaction torques can occur.
Changing the Chiselling Position (Vario-Lock)
The chisel can be locked in 36 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 unlocking button 5 and turn
the mode selector switch 6 to "Changing the
chiselling position (Vario-lock)".
Turn the tool holder to the desired chiselling po-
sition.
Press and hold the unlocking button 5 and turn
the mode selector switch 6 to the "Chiselling"
position. The tool holder is locked in this posi-
tion.
For chiselling, set the rotation direction to right
rotation.

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 immediately. We recommend hav-
ing this carried out by an after-sales service.
Bosch Power Tools