Manual Bosch GTK 40 Professional (page 15 of 160) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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Bosch Power Tools 1 609 92A 10X | (11.11.14)

English | 15

Connecting the Air Supply to the Pneumatic Tool

–Empty the magazine 8.

(See “Emptying the Magazine”, page 15)

For the following worksteps, a fastener can be dis-

charged when interior parts of the pneumatic tool are

not in the starting position due to repairs, maintenance

or transport.

– Connect the air connector 6 with a supply-air hose 17

equipped with an air-connection coupling 16.

– Check the proper function by placing the outlet 13 or

the rubber workpiece protector 1 of the pneumatic tool

onto a piece of scrap wood or wood material, and dis-

charging once or twice.

Loading the Magazine

Disconnect the air supply before making

any adjustments, changing accessories,

or placing the pneumatic tool aside. This

safety measure prevents accidental start-

ing of the pneumatic tool.

 Use only original Bosch accessories (see “Technical

Data”). The precision parts of the pneumatic tool such

as the magazine, the outlet and the shot duct are

matched to Bosch staples, nails and brads. Other man-

ufacturers use other steel qualities and sizes.

Using fasteners not permitted, can damage the pneu-

matic tool and cause injuries.

While loading the magazine, hold the pneumatic tool in

such a manner that the outlet 13 is not pointed at your own

body or at other persons.

GTK 40 (see figures B1–B2)

– Pull back the magazine slider 11 until the button of mag-

azine-slider lock 7 fully engages.

– Clean and lubricate the magazine slider 11 as required

and make sure that the magazine 8 is not dirty/soiled.

– Place a fitting strip of staples 18 over magazine 8.

The staple heads must face completely flush against the

surface of the magazine and the staple strips must move

easily in the magazine.

– Lightly pull back magazine slider 11 and press the but-

ton of magazine-slider lock 7 inward.

– Carefully guide the magazine slider to the front until it

touches the staple strip.

Note: Do not let the magazine slider snap back without

guiding it. Otherwise, the magazine slider could become

damaged, and there is danger of your fingers being caught

or pinched.

GSK 50 (see figures C1–C2)

– Press magazine lock 14 and at the same time pull maga-

zine 8 toward the rear to the stop.

– Clean and lubricate magazine rail 20 as required.

– Insert a fitting nail strip 19.

If possible, the nail tip should touch the magazine rail

20.

– Slide the nail strip in the magazine all the way to the

front.

– Insert the magazine until magazine lock 14 engages

again.

Refill the magazine when the red bars of refill indicator 15

can be seen halfway.

Operation

Actuation systems

The pneumatic tool can be operated with two different ac-

tuations 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 placing the pneumatic tool aside. This

safety measure prevents accidental start-

ing of the pneumatic tool.

Working with Single Actuation (see figure D)

– Press selector switch 9 inward and at the same time piv-

ot it to the bottom position until it engages.

The actuation system “single

actuation” 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 work-

piece.

– For another driving procedure, completely lift the pneu-

matic tool from the workpiece and position it firmly at

the next desired location.

Working with Contact Actuation (see figure E)

– Press selector switch 9 inward and at the same time piv-

ot it to the upper position until it engages.

The actuation system

“contact actuation” 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 work-

piece.

– For another driving procedure, completely lift the pneu-

matic 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 placing the pneumatic tool aside. This

safety measure prevents accidental start-

ing 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 pneumat-

ic 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 16).

Avoid any weakening and damage whatsoever of the pneu-

matic tool, e.g., through:

– Imprinting or engraving,

– Retrofitting measures not approved by the manufactur-

er,

– Guiding along templates manufactured of hard material,

e.g. steel,

– Dropping on or sliding over the floor,

– Using as a hammer,

–Applying any kind of force.

Make sure to check whatever is below or behind your work-

piece. Do not shoot staples (GTK 40) or brads (GSK 50) in-

to walls, ceilings or floors, when persons are behind them.

The fasteners can burst through the workpiece and injure

someone.

Do not shoot a staple (GTK 40) or brad (GSK 50) on al-

ready driven-in fasteners. This could cause the fastener to

deform, the fasteners could become jammed or the pneu-

matic tool could move uncontrolled.

When the pneumatic tool is used under cold ambient con-

ditions, the first staples (GTK 40) or brads (GSK50) are

driven in slower than usual. Once the pneumatic tool has

warmed up during working, normal operating speed will be

regained.

Avoid blank shots in order to reduce the wear of the impact

striker.

For longer work breaks or after finishing work, disconnect

the pneumatic tool from the air supply and empty the mag-

azine.

Emptying the Magazine

GTK 40

– Pull back the magazine slider 11 until the button of mag-

azine-slider lock 7 fully engages.

– Remove staple strip 18.

– Lightly pull back magazine slider 11 and press the but-

ton of magazine-slider lock 7 inward.

– Carefully guide the magazine slider to the front until it

touches the beginning of the magazine.

Note: Do not let the magazine slider snap back without

guiding it. Otherwise, the magazine slider could become

damaged, and there is danger of your fingers being caught

or pinched.

GSK 50

–Press magazine lock 14 and at the same time pull maga-

zine 8 toward the rear to the stop.

– Remove the nail strips 19.

– Insert the magazine until magazine lock

engages again.

Adjusting the Depth Stop (see figure F)

The driving depth of the staples (GTK 40) or brads

(GSK 50) can be set with thumbwheel 3.

–Empty the magazine 8.

(See “Emptying the Magazine”, page 15)

– Nails are driven in too deeply:

To reduce the driving depth, turn thumbwheel 3 in anti-

clockwise direction.

Nails are not driven in deep enough:

To increase the driving depth, turn thumbwheel 3 in

clockwise direction.

– Refill the magazine.

(See “Loading the Magazine”, page 15)

– Test the new driving depth on a test workpiece.

Repeat the worksteps as required.

Clearing Jams

Single staples (GTK 40) or brads (GSK 50) can become

jammed in the shot duct. If this should occur frequently,

please contact an authorised service agent for Bosch pow-

er tools.

Note: When the driver blade does not return after clearing

a jam, please contact an authorised service agent for

Bosch power tools.

GTK 40 (see figures G1–G3)

–Empty the magazine 8.

(See “Emptying the Magazine”, page 15)

– Press clamping lever 12 down so that the shot duct

opens.

– Remove the jammed staple. For this, use a pair of pliers,

if required.

– When driver blade 21 is extended, push it back into the

piston using a lubricated screwdriver or other suitable

lubricated object.

– Lubricate the shot duct with 2–3 drops of engine oil

(SAE 10 or SAE 20).

– Close the shot duct, hang the clip of clamping lever 12

into the hooks on the shot duct and then push the

clamping lever up again.

– Refill the magazine.

(See “Loading the Magazine”, page 15)

OBJ_BUCH-1038-004.book Page 15 Tuesday, November 11, 2014 2:36 PM

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Bosch GTK 40 Professional Manual

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