Pro Work PEK 1840 Mode D'emploi page 20

Anl PEK 1840 SPK1 11.11.2005
GB
damage the saw chain. Avoid bringing the running
saw into contact with wire fences or the ground.
When lopping off branches, support the machine as
far as possible and do not saw with the tip of the
chain bar. Watch out for obstacles such as tree
stumps, roots, ditches and hillocks as these could
cause you to fall.
Remember:
The chainsaw must be running before it comes into
contact with the wood!
To switch on (Fig. 1): Press the safety lock-off (4)
and ON/OFF switch (5). Place the lowest claw (13)
on the wood. Raise the chainsaw by the rear grip (6)
and saw into the wood. Move the chainsaw back a
little and place the claw (13) further down. Pay extra
attention when cutting splintered wood. Pieces of
wood may be catapulted in any direction.
To switch off: Release the ON/OFF switch.
Pull out the power plug.
Remove the chainsaw from the wood only with
the saw chain still running. Anyone who saws
without a stop can be pulled forward.
Wood under tension
Fig. 10.1: Top side of trunk under tension
Danger: Tree will rear up!
Fig. 10.2: Bottom side of trunk under
tension
Danger: Tree will move downwards!
Fig. 10.3: Thick trunks and high tension
Danger: Tree will move suddenly and
with immense force!
Fig. 10.4: Both sides of trunk under
tension
Danger: Tree will move sideways!
Felling trees
To fell trees, observe all the safety regulations
and proceed as follows:
The chainsaw may be used to fell only trees which
are smaller in diameter than the length of the chain
bar. Never try to extract a jammed saw with the
motor still running. If the saw chain gets jammed,
release it using a wooden wedge.
Remember:
Danger zone: Falling trees can bring down
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other trees with them. The danger zone is the-
refore twice the length of the tree being felled.
(Fig. 11)
Important:
Prior to cutting you must plan and provide for an
escape area (A). This escape area must be located
behind the expected felling direction (B) (Fig. 13).
Important:
Before performing the final cut, make sure there are
no spectators, animals or obstacles in the felling
path.
Felling trees is dangerous and requires practice.
If you are a beginner or inexperienced, do not try
to teach yourself but seek professional training.
(Fig. 12)
Felling direction:
First estimate the direction of fall, taking into
account the centre of gravity of the crown and
the wind direction. The chainsaw must be run-
ning before it comes into contact with the wood.
Switch on the chainsaw. Saw an undercut in the
tree in the direction of fall and then make a hori-
zontal cut (back cut) on the side opposite to the
undercut.
Make the undercut: This will give the tree direc-
tion and guidance.
Check the direction of fall: If you have to correct
the undercut, always recut over the entire width.
Call out „Timber!"
Only now make the back cut, which must be hig-
her than the sole of the undercut. Insert wedges
in good time.
Leave the bridge in place as it will function as a
hinge. If you cut through the bridge, the tree will
fall randomly.
Fell the tree by driving a wedge into the back cut,
not by sawing through it.
When the tree falls, step back and watch the
crown. Wait for the crown to stop swinging. Do
not continue working under branches which have
got stuck.
Do not fell trees:
if you can no longer distinguish details within the
danger zone, e.g. owing to fog, rain, snow drifts
or twilight,
if the direction of fall cannot be reliably estimated
owing to wind or gusts of wind. Felling work on
sloping ground, black ice, frozen or dewy ground