34
| English
1 609 929 P88 | (13.1.09)
Bosch Power Tools
Tensioning the Saw Chain (see figure A)
Always check the chain tension before use, after
the first cuts and regularly during use approx.
every 10 minutes. Upon initial operation, new
chains can lengthen considerably.
The chain life of the saw chain mainly depends up-
on sufficient lubrication and correct tensioning.
Avoid tensioning the chain if it is hot, as this will
cause the chain to become overtensioned and
face too tightly against the chain bar when it
cools down.
– Place the chain saw on any suitable flat sur-
face.
– Turn locking knob
14
approx. 1 – 3 turns anti-
clockwise to loosen the chain bar.
– Check if the chain links are correctly located
in the slot around the chain bar
11
and on the
drive sprocket
18
.
– Turn the red chain-tensioning ring
13
clock-
wise ratcheting until the correct chain ten-
sion is reached. The ratchet mechanism pre-
vents the chain tension from loosening. If the
chain-tensioning ring
13
is hard to turn, loos-
en the locking knob
14
further in anticlock-
wise direction. The locking knob
14
may also
turn, when adjusting the chain-tensioning
ring
13
.
– The saw chain
10
is correctly tensioned when
it can be raised approx. 3 – 4 mm from the
chain bar in the centre. This should be done
by using one hand to raise the saw chain
against the weight of the machine.
– If the saw chain
10
is overtensioned, turn the
chain-tensioning ring
13
in anticlockwise di-
rection.
Clamping the Chain Bar
– When the chain
10
is tensioned, clamp the
chain bar
11
by turning the locking knob
14
in clockwise direction. Do not use a tool for
this.
Saw-chain Lubrication
(see figures A–B)
Note:
The chain saw is not supplied filled with
oil. It is essential to fill with oil before use. Op-
erating the chain saw without chain oil or when
the oil level is below the minimum mark will re-
sult in damage to the chain saw.
Chain life and cutting capacity depend on opti-
mum lubrication. Therefore, the chain is auto-
matically lubricated with chain oil during opera-
tion via the oil outlet
19
.
Filling the oil reservoir:
– Set chain saw on any suitable surface with
the oil filler cap
4
facing upward.
– Clean area around the oil filler cap
4
with a
cloth and unscrew the cap.
– Do not remove filter insert during filling.
– Add Bosch biodegradable chain saw oil until
reservoir is full.
– Avoid dirt or debris from entering the oil res-
ervoir. Screw on oil filler cap
4
again and
tighten.
Note:
Four small compensation channels allow
for pressure compensation between the oil res-
ervoir and the environment. For functional rea-
sons, minor amounts of oil can escape here.
Please take care to place down the chain saw
with the oil filler cap
4
facing upward.
Note:
It is important to use only the recom-
mended biodegradable oil to avoid damage to
the chain saw. Never use recycled/old oil. Use of
non approved oil will invalidate the warranty.
14
13
10
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OBJ_BUCH-716-001.book Page 34 Tuesday, January 13, 2009 3:26 PM
