Mode Selector Switch; Safety Clutch; Changing Chiselling Position; Change The Sds-Plus Tool Holder - Bosch GBH 4 DFE PROFESSIONAL Operating Instructions Manual

Mode Selector Switch

Operate the mode selector switch 4 only
when the machine is at a standstill.
Press the release button 5 on the mode selector
switch 4 and turn the switch to the desired posi-
tion.
Drilling
Hammer drilling
Changing the Chiselling
Position (Vario-lock)
Chiselling (rotation off)

Safety 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 drilling tool jams, switch the machine off and
loosen the drilling tool. When switching the ma-
chine on with the drilling tool jammed, high reac-
tion torques can occur!
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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 in the tool holder.
Press the release button 5 and turn the mode se-
lector switch 4 at the same time to the "Chisel
(Vario-lock)" position.
Turn the tool holder to the desired chiselling posi-
tion.
Allow the mode selector switch 4 to latch in the
"Chiselling" position. The tool holder is locked in
this position.
The mode selector switch 4 must always be
locked in the "Chiselling" position when chis-
elling.
Change the SDS-plus Tool
Holder
Removal (see figure
Set the mode selector switch 4 temporarily to the
"Chiselling" position (drill spindle locked).
Turn the locking sleeve 2 firmly counter clock-
wise to the stop and pull off the tool holder.
Mounting
Place the tool holder on the drill spindle.
Turn the locking sleeve 2 counter clockwise (to
the left) and press back firmly at the same time
until the tool holder latches and locks itself. En-
sure that the tool holder is firmly seated.
English - 4
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