Bosch PSB 850-2 RE Original Instructions Manual page 23

Removing the Extraction Device (see figure E)
For disassembly of the extraction device 14,
press release button 21 and pull off the extrac-
tion device 14 toward the front.
Stowing the Extraction Device (see figure F)
For stowing the extraction device 14 in the case,
remove the extraction device 14, slide it togeth-
er and attach clamp 22.
Attach the locking latch 23 or empty the dust
collector 15 before placing down the extraction
device.
Auxiliary Handle
Operate your machine only with the auxilia-
ry handle 12.
The auxiliary handle 12 can be set in 8 positions
to achieve a safe and low-fatigue working
stance.
Turn the wing bolt for adjustment of the auxilia-
ry handle 13 in anticlockwise direction and push
the auxiliary handle 12 forward until you can piv-
ot it to the desired position. Then pull the auxil-
iary handle 12 back again and tighten the wing
bolt 13 again in clockwise direction.
Adjusting the Drilling Depth (see figure G)
The required drilling depth X can be set with the
depth stop 1.
Press the button for the depth stop adjustment
3 and insert the depth stop into the auxiliary
handle 12.
The knurled surface of the depth stop 1 must
face downward.
Pull out the depth stop until the distance be-
tween the tip of the drill bit and the tip of the
depth stop correspond with the desired drilling
depth X.
Changing the Tool (see figure H)
Keyless Chuck
The drill spindle is locked when the On/Off
switch 10 is not pressed. This makes quick, con-
venient and easy changing of the tool in the drill
chuck possible.
Bosch Power Tools
Open the keyless chuck 2 by turning in rotation
direction , until the tool can be inserted. Insert
the tool.
Firmly tighten the collar of the keyless chuck 2
by hand in rotation direction
action ("click") is no longer heard. This automat-
ically locks the chuck.
The locking is released again to remove the tool
when the collar is turned in the opposite direc-
tion.
Screwdriver Tools
When working with screwdriver bits 25, a uni-
versal bit holder 24 should always be used. Use
only screwdriver bits that fit the screw head.
For driving screws, always position the "Drill-
ing/Impact Drilling" selector switch 4 to the
"Drilling" symbol.
Replacing the Drill Chuck
Before any work on the machine itself, pull
the mains plug.
Removing the Drill Chuck (see figure I)
Disassemble the auxiliary handle and set the
gear selector 11 to the centre position between
the 1st and 2nd gear.
Insert a steel pin with a diameter of Ø 4 mm and
approx. 50 mm of length into the drill hole on
the spindle neck in order to lock the drill spin-
dle.
Clamp the short end of an Allen key 26 into the
keyless chuck 2.
Place the machine on a stable surface (e. g. a
workbench). Hold the machine firmly and loos-
en the keyless chuck 2 by turning the Allen key
26 in rotation direction
keyless chuck by giving the long end of the Allen
key 26 a light blow. Remove the Allen key from
the keyless chuck and completely unscrew the
keyless chuck.
English | 23
until the locking
. Loosen a tight-seated
2 609 003 378 | (4.6.09)