Starting Operation; Working Advice - Bosch GTK 40 Professional Original Instructions Manual

OBJ_BUCH-1038-001.book Page 26 Wednesday, December 9, 2009 1:38 PM
26 | English
Operation
Actuation systems
The pneumatic tool can be operated with two different
actuations systems:
– Single actuation with safety run
With this actuation system, the discharge lock-off 2
must first be firmly pressed against the workpiece. A
fastener is not discharged until the trigger 10 is pulled.
Afterwards, further discharging procedures can only
be actuated, when the trigger and the discharge lock-
off have first been set back to the starting position.
– Contact actuation
With this actuation system, the trigger 10 must be
pulled first. A fastener is always discharged when the
discharge lock-off 2 is firmly pressed against the work-
piece while the trigger is pressed.
This enables a higher working speed to be achieved.
The actuation system is set via the selector switch 9.

Starting Operation

Disconnect the air supply before making any
adjustments, changing accessories, or plac-
ing the pneumatic tool aside. This safety
measure prevents accidental starting of the
pneumatic tool.
Working with Single Actuation (see figure D)
– Press selector switch 9 inward and at the same time
pivot it to the bottom position until it engages.
The actuation system "single actua-
tion" is set.
– Release the selector switch 9 again.
– Firmly position the outlet 13 or the rubber workpiece
protector 1 on the workpiece until discharge lock-off 2
is pressed in completely.
– Afterwards, briefly press trigger 10 and release again.
A staple (GTK 40) or a brad (GSK 50) is discharged.
– Allow the pneumatic tool to bounce back from the
workpiece.
– For another driving procedure, completely lift the
pneumatic tool from the workpiece and position it
firmly at the next desired location.
1 609 929 U13 | (9.12.09)
Working with Contact Actuation (see figure E)
– Press selector switch 9 inward and at the same time
pivot it to the upper position until it engages.
The actuation system "contact ac-
tuation" is set.
– Release the selector switch 9 again.
– Press and hold the trigger 10.
– Firmly position the outlet 13 or the rubber workpiece
protector 1 on the workpiece until discharge lock-off 2
is pressed in completely.
A staple (GTK 40) or a brad (GSK 50) is discharged.
– Allow the pneumatic tool to bounce back from the
workpiece.
– For another driving procedure, completely lift the
pneumatic tool from the workpiece and position it
firmly at the next desired location.
– Move the pneumatic tool uniformly over the workpiece
by lifting it off and applying it again.
Each time when applying the pneumatic tool while the
discharge lock-off is pressed in, a staple (GTK 40) or a
brad (GSK 50) is discharged.
– As soon as the desired amount of staples (GTK 40) or
brads (GSK 50) have been driven in, release trigger 10
again.

Working Advice

Disconnect the air supply before making any
adjustments, changing accessories, or plac-
ing the pneumatic tool aside. This safety
measure prevents accidental starting of the
pneumatic tool.
Check the proper function of the safety and actuation de-
vices, and the tight seating of all screws and nuts each
time before using.
Disconnect a defective or not properly operating pneu-
matic tool immediately from of the air supply and contact
an authorised service agent for Bosch power tools.
Do not perform any incorrect manipulations on the pneu-
matic tool. Do not disassemble or block any components
of the pneumatic tool, such as the discharge lock-off.
Do not carry out "emergency repairs" with unsuitable
means. The pneumatic tool is to be maintained regularly
and properly (see "Maintenance and Cleaning", page 28).
Bosch Power Tools