Manual Bosch GSN 90-34 DK (page 14 of 158) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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1 609 929 Y30 | (16.8.12) Bosch Power Tools

14 | English

Declaration of Conformity

We declare under our sole responsibility that the product

described under “Technical Data” is in conformity with the

following standards or standardization documents:

EN 792 according to the provisions of the directive

2006/42/EC.

Technical file (2006/42/EC) at:

Robert Bosch GmbH, PT/ESC,

D-70745 Leinfelden-Echterdingen

Robert Bosch GmbH, Power Tools Division

D-70745 Leinfelden-Echterdingen

Leinfelden, 16.08.2012

Assembly

Connecting the Air Supply (seefigure A)

Make sure that the pressure of the compressed-air system

is below the maximum permitted rated pressure of the

pneumatic tool. Firstly, set the air pressure to the lower

value of the recommended rated pressure (see “Technical

Data”).

When in doubt, check the pressure at the air inlet with a

pressure gauge with the pneumatic tool switched on.

For maximum performance, the values for the supply-air

hose 13 (connection thread, maximum operating pres-

sure, inner hose diameter, maximum hose length; see

“Technical Data”) must be observed.

The compressed air supplied should be free of foreign ma-

terial and moisture to protect the tool from damage, con-

tamination, and the formation of rust.

All fittings, connecting lines and hoses must be dimen-

sioned for the pressure and the required air volume.

Avoid restrictions in the air supply, e.g., from pinching,

kinking, or stretching!

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 13

equipped with an air-connection coupling 12.

– Check the proper function by placing the outlet 11 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 (see figures B1–B2)

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.

f 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 11 is not pointed at your own

body or at other persons.

– Pull back the magazine slider 7 until it engages at the

rear.

Note: The magazine slider must slide back with only low

force (finger-pressure). A tight-running magazine slider

causes the nails to be driven in at an incorrect angle.

– Clean and lubricate the magazine slider 7 as required

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

– Insert a fitting nail strip 14.

Do not use nail strips with less than 5 nails. Do not insert

more than 2 nail strips. Make sure that the heads of the

nails do not overlap.

GSN 90-34 DK: With this pneumatic tool, a lock function

of the magazine slider prevents the last nails from being

discharged. Approx. 7 nails remain in the magazine.

– Completely pull back the magazine slider 7 once more

to free the lock.

– Carefully guide the magazine slider to the front until it

touches the nail strip.

Make sure that the magazine slider is slid beyond the

head of the last nail.

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.

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 C)

– 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 11 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 nail 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 D)

– 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 11 or the rubber workpiece

protector 1 on the workpiece until discharge lock-off 2

is pressed in completely.

A nail 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 nail will be dis-

charged.

– As soon as the desired amount of nails 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 15).

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 nails into walls, ceilings or floors, when

persons are behind them. The nails can burst through the

workpiece and injure someone.

Noise/Vibration Information

Measured noise values determined according to EN 12549.

Typically the A-weighted noise levels of the pneumatic tool are:

Sound pressure level XXX dB(A); sound power level YYY dB(A). Un-

certainty K=2 dB.

Wear hearing protection!

dB(A)

XXX = 110

YYY = 123

XXX = 110

YYY = 123

XXX = 94

YYY = 107

Vibration total values a

and uncertainty K determined according to

EN ISO 20643:

=ZZZm/s

, K= 1,5 m/s

. m/s

ZZZ < 2.5 ZZZ < 2.5 ZZZ = 4.4

Compressed-air nailer GSN 90-21 RK GSN 90-34 DK GSN 100-34 DK

Dr. Egbert Schneider

Senior Vice President

Engineering

Helmut Heinzelmann

Head of Product Certification

PT/ETM9

OBJ_BUCH-1037-004.book Page 14 Thursday, August 16, 2012 4:34 PM

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Bosch GSN 90-34 DK Manual

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