Operation - Bosch GCO 2000 Professional Operating Instructions Manual

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– Turn hexagon bolt 27 with the provided ring spanner 13
(15 mm) and at the same time press the spindle lock 4
until it engages.
– Hold the spindle lock pressed and unscrew the hexagon
bolt 27.
– Remove the washer 26 and the clamping flange 25.
– Remove the cutting disc 23.
Installing the Cutting Disc
If required, clean all parts to be mounted prior to assembly.
– Mount the new cutting disc onto the tool spindle 24 in
such a manner that its lable faces away from the tool arm.
– Mount the clamping flange 25, the washer 26 and the
hexagon bolt 27. Press spindle lock 4 until it engages and
tighten hexagon bolt 27 with the provided ring spanner
13. (Tightening torque approx. 18–20 Nm)
– Swing cover lid 20 toward the front and tighten wing bolt
21 again.
– Slide lever 19 downward alongside the guide groove again
and at the same time swing the retracting blade guard 5
downward until the lever engages.
– Make sure that the retracting blade guard 5 operates
properly.
After mounting the cutting disc and before switching on,
check whether the cutting disc is properly mounted and if it
can rotate freely.
– Make sure that the cutting disc does not graze against the
retracting blade guard 5, the blade guard 18 or against
other parts.
– Run the machine for approx. 30 seconds. Should
significant vibrations occur, switch off the machine
immediately; remove and install the cutting disc again.

Operation

► Before any work on the machine itself, pull the mains plug.
Transport Safety
The transport safety-lock enables easier handling of the
machine when transporting to various working locations.
Releasing the Machine (Working Position) (see figure C1)
– Press the tool arm 28 down via the handle 3 until you can
unhook the hook 14 of the securing chain 16 from the tool arm.
– Guide the tool arm slowly upward.
Securing the Machine (Transport Position) (see figure C2)
– Guide the tool arm 28 down via the handle 3 until you can
securely hook the hook 14 of the securing chain 15 to the tool arm.
For additional information on transport, see page 23.
Adjusting the Cutting Angle (see figure D)
The miter angle can be set in a range from 0° to 45°.
Frequently used mitre angles are identified on the angle stop
10 with appropriate markings. The 0° and 45° position are
set at the respective end stop.
– Loosen the locking screws 11 for the angle stop with the
supplied ring spanner 13 (15 mm).
– Adjust the desired angle and firmly tighten both locking
screws 11 again.
Manual GCO 2000 Guarda Completa Bosch.indd 22
Displacing the Angle Stop (see figure D and E)
When cutting workpieces wider than 140mm, the angle stop
10 can be displaced to the rear.
– Completely unscrew locking screws 11 with the supplied
ring spanner 13 (15mm).
– Move the angle stop 11 toward the rear by one or two
holes to the desired clearance.
– Adjust the desired angle and firmly tighten both locking
screws 11 again.
Clamping the Workpiece (see figure E)
To ensure optimum working safety, the workpiece must
always be firmly clamped.
Do not saw workpieces that are too small to clamp. Long
workpieces must be underlaid or supported at their free end.
– Place the workpiece against the angle stop 10.
– Slide the clamping spindle 6 against the workpiece and
firmly clamp the workpiece with the spindle handle 8.
Loosening the Workpiece
– Loosen the spindle handle 8.
– Tilt up the quick release 7 and pull the clamping spindle 6
away from the workpiece.
Starting Operation
► Observe correct mains voltage! The voltage of the
power 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.
► Check the cutting disc before using. The cutting disc
must be properly mounted and must rotate freely.
Carry out a 30 second (min.) test run with no load. Do
not use damaged, out-of-centre or vibrating cutting
discs. Damaged cutting discs can burst and cause injuries.
Dusts from materials such lead-containing coatings, minerals
and metal can be harmful to one's health. Contact with
or inhaling the dusts can trigger allergic reactions to the
operator or bystanders and/or lead to respiratory infections.
Certain metal dusts are considered hazardous, especially in
conjunction with alloys such as zinc, aluminium or chromium.
Materials containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
The blade can be blocked by dust, chips or workpiece
fragments in the slot of the base plate 12.
– Switch the machine off and pull the mains plug from the
socket outlet.
– Wait until the cutting disc has come to a complete stop.
– Tilt the machine toward the rear, so that small workpiece
fragments can fall out of the opening intended for this
purpose. If required, use a suitable tool to remove all
workpiece fragments.
► Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Position of the Operator (see figure F)
► Do not stand in a line with the cutting disc in front of
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