Bosch GSN 90-21 RK Original Instructions Manual page 12

OBJ_BUCH-1037-001.book Page 26 Tuesday, December 8, 2009 1:03 PM
26 | English
Avoid any weakening and damage whatsoever of the
pneumatic tool, e.g., through:
– Imprinting or engraving,
– Retrofitting measures not approved by the manufactur-
er,
– Guiding along templates manufactured of hard materi-
al, 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 con-
ditions, 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 im-
pact striker.
For longer work breaks or after finishing work, discon-
nect 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 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.
Adjusting the Depth Stop (see figure E)
The driving depth of the nails can be set with depth stop
3.
– Empty the magazine 8.
(See "Emptying the Magazine", page 26)
– To reduce the driving depth, turn the depth stop clock-
wise.
or
1 609 929 U15 | (8.12.09)
To increase the driving depth, turn the depth stop an-
ticlockwise.
– Refill the magazine.
(See "Loading the Magazine", page 24)
– Test the new driving depth on a test workpiece.
Repeat the worksteps as required.
Clearing Jams (see figures F1
Single nails can become jammed in the shot duct. If this
should occur frequently, please contact an authorised
service agent for Bosch power tools.
– Empty the magazine 8.
(See "Emptying the Magazine", page 26)
– 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 accessi-
ble.
– 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
(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 retainers 19 and push the mag-
azine completely to the front. Lock the magazine by
completely folding magazine lock 15 up.
– Refill the magazine.
(See "Loading the Magazine", page 24)
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 26)
– Loosen locking screw 21 (3 mm) with the supplied Al-
len 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.
F3)
–
3 drops of engine oil
–
Bosch Power Tools