Auxiliary Handle; Starting Operation - Bosch WEU 850-2 RE Originalbetriebsanleitung

Empty and clean the dust collector 15. Clean the filter ele-
ment 19 by gently striking or tapping against it.
Check the filter element 19 for damage and replace it as re-
quired.
Press on the holder of the filter element 19 and pull it out. Re-
place the filter element 19 including the holder. When placing
on the holder again, make sure that the rubber gasket 20 is in-
serted.
Reattach the dust collector 15 again and lock it by pressing
against the smooth surface of the release button 18.
Removing the Extraction Device (see figure E)
For disassembly of the extraction device 14, press release
button 22 and pull off the extraction 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 together and attach clamp 23.
Attach the locking latch 24 or empty the dust collector 15 be-
fore placing down the extraction device.

Auxiliary Handle

 Operate your machine only with the auxiliary handle
12.
 Before any work, make sure that the wing bolt 13 is
firmly tightened. Loss of control can cause personal inju-
ry.
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 auxiliary handle 13 in
anticlockwise direction and push the auxiliary handle 12 for-
ward until you can pivot it to the desired position. Then pull
the auxiliary 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 between the tip of
the drill bit and the tip of the depth stop corresponds 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, convenient and easy changing of
the tool in the drill chuck possible.
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 ro-
tation direction  until the locking action ("click") is no longer
heard. This automatically locks the chuck.
The locking is released again to remove the tool when the col-
lar is turned in the opposite direction.
Bosch Power Tools
Screwdriver Tools
When working with screwdriver bits 26, a universal bit holder
25 should always be used. Use only screwdriver bits that fit
the screw head.
For driving screws, always position the "Drilling/Impact Drill-
ing" 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 spindle.
Clamp the short end of a hex key 27 into the keyless chuck 2.
Place the machine on a stable surface (e. g. a workbench).
Hold the machine firmly and loosen the keyless chuck 2 by
turning the hex key 27 in rotation direction . Loosen a tight-
seated keyless chuck by giving the long end of the hex key 27
a light blow. Remove the hex key from the keyless chuck and
completely unscrew the keyless chuck.
Mounting the Drill Chuck (see figure J)
The keyless chuck is mounted in reverse order.
 Remove the steel pin from the drill hole on the spindle
neck after mounting is completed.
The drill chuck must be tightened with a tightening
torque of approx. 50–55 Nm.
Operation

Starting Operation

 Observe correct mains voltage! The voltage of the pow-
er 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.
Reversing the rotational direction (see figure K)
The rotational direction switch 9 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 10 actuated.
Right rotation: Press the rotational direction switch 9
through to the right stop (for drilling and driving screws).
The indicator for right-hand rotation 6 indicates the selected
rotational direction.
Left rotation: Press the rotational direction switch 9 through
to the left stop (for loosening and unscrewing screws and
nuts).
The indicator for left-hand rotation 7 indicates the selected
rotational direction.
English | 19
1 609 92A 0TW | (27.10.14)