Bosch GBH 3-28 DRE Original Instructions Manual page 25

24 | English
For hammer drilling and chiselling, SDS-plus
tools are required that are inserted in the
SDS-plus drill chuck.
For drilling without impact in wood, metal, ce-
ramic and plastic as well as for screwdriving,
tools without SDS-plus are used (e.g., drills
with cylindrical shank). For these tools, a key-
less chuck or a key type drill chuck are required.
GBH 3-28 DFR: The SDS-plus quick change
chuck 2 can easily be replaced against the quick
change keyless chuck 1 provided.
Changing the Key Type Drill Chuck
(GBH 3-28 DRE)
To work with tools without SDS-plus (e.g., drills
with cylindrical shank), a suitable drill chuck
must be mounted (key type drill chuck or key-
less chuck, accessories).
Mounting the Key Type Drill Chuck
(see figure C)
Screw the SDS-plus adapter shank 16 into a key
type drill chuck 15. Secure the key type drill
chuck 15 with the securing screw 14. Please ob-
serve that the securing screw has a left-hand
thread.
Inserting the Key Type Drill Chuck
(see figure C)
Clean the shank end of the adapter shank and
apply a light coat of grease.
Insert the key type drill chuck with the adapter
shank into the tool holder with a turning motion
until it automatically locks.
Check the locking effect by pulling the key type
drill chuck.
Removing the Key Type Drill Chuck
Push the locking sleeve 5 toward the rear and
pull out the key type drill chuck 15.
1 619 929 E56 | (7.4.09)
Removing/Inserting the Quick Change
Chuck (GBH 3-28 DFR)
Removing the Quick Change Chuck
(see figure D)
Pull the lock ring for the quick change chuck 6
toward the rear, hold it in this position and pull
off the SDS-plus quick change chuck 2 or the
quick change keyless chuck 1 toward the front.
After removing, protect the replacement chuck
against contamination.
Inserting the Quick Change Chuck (see figure E)
Use only model-specific original equipment
and pay attention to the number of identifi-
cation grooves 18. Only quick-change
chucks with two or three identification
grooves are permitted. When an unsuitable
quick-change chuck is used, the application
tool could fall out during operation.
Before inserting, clean the quick change chuck
and apply a light coat of grease to the shank end.
Grasp the SDS-plus quick change chuck 2 or the
quick change keyless chuck 1 completely with
your hand. Slide the quick change chuck with a
turning motion onto the drill chuck mounting 17
until a distinct latching noise is heard.
The quick change chuck is automatically locked.
Check the locking effect by pulling the quick
change chuck.
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