Battery Charging; Starting Operation; Working Advice - Bosch GUS 12V-300 Professional Originalbetriebsanleitung

OBJ_BUCH-2921-001.book Page 13 Friday, July 1, 2016 1:25 PM
The declared vibration emission level represents the main ap-
plications of the tool. However if the tool is used for different
applications, with different accessories or insertion tools or is
poorly maintained, the vibration emission may differ. This
may significantly increase the exposure level over the total
working period.
An estimation of the level of exposure to vibration should also
take into account the times when the tool is switched off or
when it is running but not actually doing the job. This may sig-
nificantly reduce the exposure level over the total working
period.
Identify additional safety measures to protect the operator
from the effects of vibration such as: maintain the tool and the
accessories, keep the hands warm, organisation of work pat-
terns.
Assembly

Battery Charging

 Use only the chargers listed in the technical data. Only
these chargers are matched to the lithium-ion battery of
your power tool.
Note: The battery supplied is partially charged. To ensure full
capacity of the battery, completely charge the battery in the
battery charger before using your power tool for the first time.
The lithium-ion battery can be charged at any time without re-
ducing its service life. Interrupting the charging procedure
does not damage the battery.
Battery Charge-control Indication
The three green LEDs of the battery charge-control indicator
9 indicate the charge condition of the battery 6. For safety
reasons, it is only possible to check the status of the charge
condition when the machine is at a standstill.
To indicate the charge condition, press and hold button 8 of
the switched off machine.
LED
Continuous lighting 3 x green
Continuous lighting 2 x green
Continuous lighting 1 x green
Flashing light 1 x green
Removing the battery (see figure A)
To remove the battery 6, press the unlocking buttons 7 and
pull the battery out of the machine to the rear. Do not exert
any force.
Changing the Tool (see figures B1–B2)
 The blade can become warm during operation. Before
removing, allow the blade to cool down.
– Loosen knurled screw 1 and set blade guard 3 to the upper
position.
– Rotate the blade 10 with a screwdriver until one of the
holes in the blade is free (uncovered).
– Insert a thin, sturdy object (e.g., a nail) into the free hole,
to block the blade.
– Unscrew the blade screw 11 in rotation direction .
Bosch Power Tools
– Remove the object with which you blocked the blade.
– Lightly lift the blade 10 and pull it down and out.
– Attach the new blade onto the tool holder ensuring that the
ground edge of the blade faces you.
Pay attention that the blade engages onto the tool holder.
– Retighten the blade screw 11 in rotation direction .
– Adjust blade guard 3 to the material thickness to be cut
and tighten knurled screw 1 again.
Operation
 Before any work on the machine itself (e. g. mainte-
nance, tool change, etc.) as well as during transport
and storage, remove the battery from the power tool.
There is danger of injury when unintentionally actuating
the On/Off switch.

Starting Operation

Inserting the battery
 Use only original Bosch lithium-ion batteries with the
voltage listed on the nameplate of your power tool.
Using other batteries can lead to injuries and pose a fire
hazard.
Note: Use of batteries not suitable for the machine can lead to
malfunctions of or cause damage to the power tool.
Insert the charged battery 6 into the handle until it can be felt
to engage and faces flush against the handle.
Switching On and Off
To start the machine, push the On/Off switch 4 forward so
that the "I" is indicated on the switch.
To switch off the machine, push the On/Off switch 4 toward
the rear so that the "0" is indicated on the switch.
To save energy, only switch the power tool on when using it.
The lithium-ion battery is protected against deep discharging
by the "Electronic Cell Protection (ECP)". When the battery is
empty, the machine is switched off by means of a protective
Capacity
circuit: The inserted tool no longer rotates.
2/3
Note: If the machine should automatically switch off because
1/3
of a discharged or overheated battery, make sure to set the
<1/3
machine's On/Off switch 4 to off. Charge the battery and al-
low it to cool down before restarting the machine. Otherwise
Reserve
the battery can become damaged.

Working Advice

 Do not strain the machine so heavily that it comes to a
standstill.
 Never touch the blade during operation 10.
The cutting performance of the machine depends on the ma-
terials to be cut and on the charging condition of the battery.
Depending on the charge condition of the battery, excessive
feed considerably reduces the performance capability.
Always keep the blade free and clean of material remainders.
The guide edge 12 may not become wedged during cutting
and must be aligned parallel to the cutting surface.
Improper use of the blade will cause it to become blunt.
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1 609 92A 2DF | (1.7.16)