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Felling trees
WARNING!
A lot of experience is necessary in felling
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trees. Cut down trees only when you can
safely handle the product. In no case should
you use the product if you feel unsure about
anything.
Do not fell any trees when a strong or
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changing wind is blowing, if the danger of
property damage exists or if the tree could
fall on electric wires.
Never step in front of a tree which is notched.
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As soon as the tree begins to fall, pull out the
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product from the section, switch off, place the
product down and leave the workplace using
the escape route.
Immediately after termination of the sawing
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procedure, remove the ear protection so that
you can hear hooter and alarm signals.
NOTE
For safety reasons, we advise inexperienced
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users not to fell any logs with a guide rail
length which is smaller than the trunk diameter.
Ensure that no people or animals are in the
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field of action. The safety distance between
the tree to be felled and the nearest located
workplace must be 2 ½ tree lengths.
Note the felling direction: You must be able
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to move safely near the felled tree, to saw
off the tree easily and remove branches. It
is to be avoided that the felled tree snags
itself on another tree. Note the natural felling
direction, which is dependent on the slope
and curvature characteristic of the tree, wind
direction and the number of branches.
Stand above the tree to be felled, in the case
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of sloping ground.
Small trees, with a diameter of 15 – 18 cm,
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can usually be cut off with one cut.
In case of trees with a larger diameter,
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a notched cut and a back cut must be
implemented (see Fig. M).
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1. Removal of branches:
Remove hanging branches by positioning
the cut from above the branch. With
removal of branches, never work higher
than shoulder level.
L
2. Escape area:
Remove the undergrowth around the tree
to ensure an easy escape. The escape
area should be around 45° either side
behind the planned felling direction.
M
3. Cutting notch:
Make a felling notch in the direction
in which you wish the tree to fall. Start
with the bottom, horizontal cut. The cut
depth should be around 1/3 of the trunk
diameter. Now make a slanted saw cut
from above at an angle of roughly 45° to
meet exactly.
4. Felling back cut:
Make the back cut from the other side of
the log, where you stand to the right of the
log and cut with the saw chain
(lower edge of the guide bar
cut must run horizontally 5 cm above the
horizontal notched cut. The back cut should
be so deep that the separation distance
between the back cut and the notch cutting
line is at least 1/10 of the trunk diameter.
The part of the log not cut through is
designated as a break dimension.
Insert a felling wedge or a crowbar into
the back cut, as soon as the depth of cut
permits this, in order to prevent a jamming
of the guide bar
If the trunk diameter is larger than the length
of the guide bar
After carrying out of the back cut, the tree
falls by itself or with the aid of the felling
wedge or crowbar.
Limbing
WARNING!
Many accidents occur during the removal of
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branches. Never cut tree limbs when you are
standing on the log. Keep the spring-back
area in mind if branches are under tension.
pulling
5
). The back
4
.
4
, make two cuts.
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