EINHELL Expert 4501202, Original Operating Instructions

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6.2 Description of the correct procedures for
basic use of the chainsaw
Felling a tree (Figs. 12-15)
If two or more persons are working at the same time
on felling and cutting back then the minimum distance
between the tree being felled and the tree being cut
back should be at least twice the height of the tree
being felled (Fig. 12). When felling trees, care must be
taken to ensure that no other persons are
endangered, no power supply lines are hit and no
material damage is caused to equipment or property.
In the event that a tree comes into contact with a
power supply line, he responsible power supply
company should be informed immediately.
When working with the saw on a slope, the operator
of the chainsaw must be standing at a higher point on
the slope than the tree being felled, as the tree will roll
or slip downhill once it has been felled (Fig. 13).
Before felling the tree you must first plan and if
necessary clear an escape route. This escape route
must lead away diagonally in the opposite direction to
the expected fall direction – this can be seen in Fig.
14 (A= danger zone, B= direction of fall, C= escape
zone).
Before felling the tree you must take into account the
natural inclination of the tree, the location of larger
branches and the wind direction, as this will help you
to correctly determine the direction in which the tree
will fall.
Dirt, stones, loose bark, nails, staples and wire must
be removed from the tree.
Making the felling notch (Fig. 15)
Cut a notch (A) at right angles to the fall direction to a
depth of 1/3 of the tree diameter as shown in Fig. 15.
First make the lower horizontal felling notch (1). This
prevents the saw chain or the guide rail from
becoming trapped when the second felling notch is
made.
Making the felling cut (Fig. 15)
The felling cut should be positioned at least 50 mm
above the horizontal felling notch. Make the felling cut
(B) parallel to the horizontal felling notch. The felling
cut should be cut to a depth which leaves a thin strip
(felling hinge strip) (D) which can act as a hinge. This
strip prevents the tree from rotating and falling in the
wrong direction. Do not cut through the strip. When
the felling cut gets close to the strip the tree should
start to fall. If it becomes clear that the tree may well
fall in a different direction to the desired fall direction
(C) or it starts to lean back and traps the saw chain,
interrupt the felling cut and insert wedges made of
wood, plastic or aluminum to open out the cut and
control the lean of the tree until it leans in the required
direction.
When the tree starts to fall, remove the chainsaw from
the cut, switch it off, place it on the ground and exit
the danger zone via the planned escape route. Watch
out for falling branches and take care not to trip.
Removing branches
Here we are talking about removing branches from
the felled tree. When removing branches, leave any
downward facing branches which are supporting the
tree until the trunk of the tree has been cut up. Smaller
branches should be removed as shown in Fig. 16 (A=
cutting direction when removing branches, B= keep
away from the ground! Supporting branches should
be left until the trunk is cut up) in a single cut from the
bottom to the top. Any branches which are under
tension should be cut from the bottom to the top to
prevent the saw from becoming trapped.
Cutting the tree trunk into lengths
Here we are looking at the process of cutting the
felled tree into sections. Make sure you have a sure
footing and distribute your body weight evenly onto
both feet. If possible the trunk should be underlaid
and supported with branches, beams or wedges. For
easy cutting follow the simple instructions below.
If the full length of the tree trunk is evenly supported
as shown in Fig. 17 then proceed by cutting from the
top down. Take care not to cut into the ground in the
process.
If the weight of the tree trunk is resting on one end as
shown in Fig. 18, first cut through 1/3 of the trunk
diameter from the underside (A) in order to prevent it
from splintering. Make the second cut from the top
(2/3 of the diameter) to the height of the first cut (B)
(this prevents the chainsaw from being trapped).
If the weight of the tree trunk is resting on both ends
as shown in Fig. 19, first cut through 1/3 of the trunk
diameter from the top (A) in order to prevent it from
splintering. Make the second cut from underneath
(2/3 of the diameter) to the height of the first cut (B)
(this prevents the chainsaw from being trapped).
When working with the saw on a slope, always
position yourself at a higher point on the slope above
the tree as shown in Fig. 13. In order to retain full
control at the moment when the cut goes through,
reduce pressure towards the end of the cut without
releasing your firm grip on the handles of the
chainsaw. Take care to ensure that the chainsaw does
not touch the ground.
After completing the cut, wait for the chain saw to
come to a standstill before removing the chainsaw.
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