Starting Operation - Bosch GBH Professional 5-38 D Manual Original

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.
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 request-
ed 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.
Bosch Power Tools
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 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.
Overload Clutch
If the tool insert becomes caught or
jammed, the drive to the drill spindle is in-
terrupted. 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 12 positions. In this
manner, the optimum working position can be
set for each application.
Insert the chisel into the tool holder.
Turn the mode selector switch 3 to the "Vario-
Lock" position (see "Setting the Operating
Mode", page 17).
Turn the tool holder to the desired chiselling po-
sition.
Turn the mode selector switch 3 to the "chisel-
ling" position. The tool holder is now locked.
The mode selector switch 3 must always be
locked in the "Chiselling" position when
chiselling.
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