Bosch Professional GSN 90-21 RK Manual Original página 19

OBJ_DOKU-25827-001.fm Page 19 Friday, March 25, 2011 10:01 AM
Check the proper function of the safety and actuation devices, and the
tight seating of all screws and nuts each time before using.
Disconnect a defective or not properly operating pneumatic tool immedi-
ately from of the air supply and contact an authorised service agent for
Bosch power tools.
Do not perform any incorrect manipulations on the pneumatic 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 pneu-
matic tool is to be maintained regularly and properly (see "Maintenance
and Cleaning", page 20).
Avoid any weakening and damage whatsoever of the pneumatic tool, e.g.,
through:
– Imprinting or engraving,
– Retrofitting measures not approved by the manufacturer,
– 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 workpiece. Do not
shoot nails into walls, ceilings or floors, when persons are behind them.
The nails can burst through the workpiece and injure someone.
Do not shoot a nail onto an already driven-in one. This could cause the nail
to deform, the nails could become jammed or the pneumatic tool could
move uncontrolled.
When the pneumatic tool is used under cold ambient conditions, the first
nails will be 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 magazine.
Emptying the Magazine
– Pull back the magazine slider 7 until it engages at the rear.
– Remove the nail strips 14.
Discard nail strips with less than 5 nails.
– 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 be-
ginning of the magazine.
Note: Do not let the magazine slider snap back without guiding it. Other-
wise, the magazine slider could become damaged, and there is danger of
your fingers being caught or pinched.
Adjusting the Depth Stop (see figure E)
The driving depth of the nails can be set with thumbwheel 3.
– Empty the magazine 8.
(See "Emptying the Magazine", page 19)
– Nails are driven in too deeply:
To reduce the driving depth, turn thumbwheel 3 in clockwise direction.
or
Nails are not driven in deep enough:
To increase the driving depth, turn thumbwheel 3 in anticlockwise di-
rection.
– Refill the magazine.
(See "Loading the Magazine", page 18)
– Test the new driving depth on a test workpiece.
Repeat the worksteps as required.
Bosch Power Tools
Clearing Jams (see figures F1 F3)
–
Single nails can become jammed in the shot duct. If this should occur fre-
quently, please contact an authorised service agent for Bosch power
tools.
– Empty the magazine 8.
(See "Emptying the Magazine", page 19)
– Open the magazine lock 15.
– Pull the magazine 8 away from the housing until it slips off of lock pin
16.
This makes the jammed nail in the shot duct accessible.
– Remove the jammed nail. For this, us a pair of pliers, if required.
– When driver blade 17 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).
– Reinsert the magazine 8 again:
Open the magazine lock 15, if required. Guide lock pin 16 into the
opening of magazine holder 18. Align the magazine to magazine retain-
ers 19 and push the magazine completely to the front. Lock the maga-
zine by completely folding magazine lock 15 up.
– Refill the magazine.
(See "Loading the Magazine", page 18)
Changing a Magazine Rail (see figure G)
The magazine rails 20 can wear after prolonged use of the pneumatic tool.
Replace defective magazine rails.
– Empty the magazine 8.
(See "Emptying the Magazine", page 19)
– Loosen locking screw 21 (3 mm) with the supplied Allen key.
– Pull cover lid 22 out of the magazine 8.
– Allow the defective magazine rails 20 to slide out of the magazine.
– Insert new magazine rails into the magazine.
– Insert cover lid 22 back into the magazine and tighten locking screw
21.
Changing the Workpiece Protector (see figure H)
The workpiece protector 1 at the end of the discharge lock-off 2 protects
the workpiece until the pneumatic tool is correctly placed for the driving
procedure.
The workpiece protector can be removed and replaced.
– Remove spring clip 23 and pull the workpiece protector from the dis-
charge lock-off 2.
– Push the new workpiece protector over the discharge lock-off and
mount the spring clip again.
Stationary Use of the Pneumatic Tool (see figure I)
For stationary use, the pneumatic tool can be fastened to a balancer.
The screwable eyelet 24 is required for this.
– Remove the rear screw of the exhaust cap with the supplied Allen key.
– Screw the eyelet 24 firmly into the exhaust cap.
– Hook the eyelet to the balancer hook.
Transport and Storage
For transport, disconnect the pneumatic tool from the air supply; espe-
cially when using ladders or moving in an unusual stance or posture.
At the workplace, carry the pneumatic tool only by the handle 5 and with
the trigger 10 released.
Always store the pneumatic tool disconnected from the air supply and at
a clean and dry location.
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