Bosch GBH 4-32 DFR Professional Original Instructions Manual page 10

OBJ_BUCH-411-006.book Page 10 Monday, October 4, 2010 10:22 AM
10 | English
Changing the Tool Holder
Dismounting the SDS-plus Tool Holder or the
Quick change keyless chuck (see figure B)
– Pull the lock ring of the tool holder 4 firmly in
the direction of the arrow, hold it in this po-
sition and pull off the tool holder 1 or the
keyless replacement chuck 13 toward the
front.
After removing, protect the tool holder 1 or the
quick change keyless chuck 13 against contami-
nation. Lightly lubricate the engaging grooves, if
required.
Mounting the SDS-plus Tool Holder or the
Quick change keyless chuck (see figure B)
Use only model-specific original equipment
and pay attention to the number of identifi-
cation grooves. Only quick-change chucks
with two identification grooves are permit-
ted. When an unsuitable quick-change chuck
is used, the application tool could fall out
during operation.
– Grasp the tool holder 1 or the keyless re-
placement chuck 13 completely with your
hand. Slide the tool holder 1 or the keyless
replacement chuck 13 with a turning motion
onto the drill chuck mounting until a distinct
latching noice is heard.
– The tool holder 1 or the quick change keyless
chuck 13 is automatically locked. Check the
locking effect by pulling the tool holder.
Changing the Tool
With the SDS-plus tool holder, simple and con-
venient tool changing is possible without addi-
tional aids.
As a requirement of the system, the SDS-plus
drilling tool can move freely. This causes a cer-
tain radial run-out at no-load, which has no ef-
fect on the accuracy of the drill hole, as the drill
bit centres itself upon drilling.
The dust protection cap 2 largely prevents the
entry of drilling dust into the tool holder during
operation. When inserting the tool, take care
that the dust protection cap 2 is not damaged.
1 609 929 V36 | (4.10.10)
A damaged dust protection cap should be
changed immediately. We recommend hav-
ing this carried out by an after-sales serv-
ice.
Inserting SDS-plus Drilling Tools (see figure C)
– Clean and lightly grease the shank end of the
tool.
– Insert the tool in a twisting manner into the
tool holder until it latches itself.
– Check the latching by pulling the tool.
Removing SDS-plus Drilling Tools
(see figure D)
– Push back the locking sleeve 3 and remove
the tool.
Inserting Drilling Tools without SDS-plus
(see figure E)
Note: Do not use tools without SDS-plus for
hammer drilling or chiselling! Tools without
SDS-plus and their drill chucks are damaged by
hammer drilling or chiselling.
– Insert the quick change keyless chuck 13.
– Firmly hold the retaining ring of the quick
change keyless chuck 13. Open the quick
change keyless chuck by turning the front
sleeve in the direction of the symbol
" ".
– Insert the drilling tool into the quick change
keyless chuck 13. Firmly hold the retaining
ring of the quick change keyless chuck 13
and turn the front sleeve in the direction of
the symbol " ".
– Check the tight seating by pulling the tool.
Note: If the tool holder was opened to the stop,
then the latching noise possibly may be heard
while closing the tool holder and the tool holder
will not close.
In this case, turn the front sleeve 14 once in the
opposite direction of the arrow. Afterwards, the
tool holder can be closed (tightened) again.
– Turn the mode selector switch 5 to the "drill-
ing" position.
Bosch Power Tools