Maintenance And Service; Maintenance And Cleaning - Bosch PROFESSIONAL GSR 12 VE-2 Instructions D'emploi

OBJ_BUCH-199-002.book Page 20 Tuesday, November 21, 2006 2:47 PM
Gear Selection, Mechanical
Actuate the gear selector 3 only when the
machine is at a standstill.
Two speed ranges can be preselected with the gear
selector 3.
Gear I:
Low speed range; for screwdriving or working with
large drilling diameter.
Gear II:
High speed range; for working with small drilling diam-
eter.
If the gear selector 3 cannot be pushed through to the
stop, lightly turn the drill chuck with drill.
Switching On and Off
To start the machine, press the On/Off switch 11 and
keep it depressed.
To switch off the machine, release the On/Off switch
11.
Adjusting the Speed
The speed of the switched on power tool can be varia-
bly adjusted, depending on how far the On/Off switch
11 is pressed.
Light pressure on the On/Off switch 11 results in a low
rotational speed. Further pressure on the switch results
in an increase in speed.
Fully automatic spindle locking (Auto-lock)
When the On/Off switch 11 is not pressed, the drill
spindle and thus the tool holder are locked.
This enables screws to be screwed in, even when the
battery is empty and allows for the machine to be used
as a screwdriver.
Run-on Brake
When the On/Off switch 11 is released, the chuck
brakes to a stop, thus preventing the run-on of the tool.
When driving in screws, wait until the screw is screwed
in flush with the material and then release the On/Off
switch 11. By doing so, the head of the screw does not
penetrate into the material.
Operating Instructions
Apply the power tool to the screw only when
it is switched off. Rotating tool inserts can slip off.
Soft Grip ("Comfort Zone")
The gripping surface (soft grip) 4 reduces the danger
of slipping and thereby improves the grip on the
machine and the handling.
At the same time, the rubber coating achieves a vibra-
tion-reducing effect.
20 | English
Tips
After longer periods of working at low speed, allow the
machine to cool down by running it for approx.
3 minutes at maximum speed with no load.
For drilling in metal, use only perfectly sharpened HSS
drill bits (HSS=high-speed steel). The appropriate
quality is guaranteed by the Bosch accessories pro-
gram.
Before screwing larger, longer screws into hard mate-
rials, it is advisable to predrill a pilot hole with the core
diameter of the thread to approx.
length.

Maintenance and Service

Maintenance and Cleaning

Before any work on the machine (e. g., main-
tenance, tool change, etc.) as well as during
transport and storage, set the rotational
direction switch to the centre position. Unin-
tentional actuation of the On/Off switch can lead to
injuries.
For safe and proper working, always keep the
machine and ventilation slots clean.
If the machine should fail despite the care taken in man-
ufacturing and testing procedures, repair should be
carried out by an after-sales service centre for Bosch
power tools.
In all correspondence and spare parts order, please
always include the 10-digit article number given on the
type plate of the machine.
Replacing the Carbon Brushes (see figure H)
When the carbon brushes are worn, the power tool
switches off automatically. For replacement of the car-
bon brushes, unscrew the four screws of the cover lid
17 and remove the cover lid 17. Insert a screwdriver or
similar into the notch of the brush holder 16 and care-
fully pry it out. Remove the used carbon brushes and
replace them. The new carbon brushes can also be
inserted when turned by 180°. Lightly press the
inserted carbon brushes downward until they can be
clearly heard to engage. Afterwards mount the cover lid
17 again.
2
/ of the screw
3
2 609 932 515 • 21.11.06