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Begin the felling cut slighty higher than the felling
notch and on the opposite side of the tree (fig. 22).
Then cut horizontally through towards the felling notch.
Apply the chain saw with its spikes directly behind the
uncut portion of wood and cut toward the notch (fig.
23).
Leave approximately 1/10 of the tree diameter
uncut! This is the hinge (fig. 23). Do not cut through the
hinge because you could lose control of the direction
of the fall. Drive wedges into the felling cut where
necessary to control the direction of the fall. Wedges
should be of wood, light alloy or plastic
-
never of steel,
which can cause kickback and damage to the chain.
Always keep to the side of the falling tree. When the
tree starts to fall, shut off the engine, withdraw the bar
and walk away on the pre-planned escape path.
Watch out for falling limbs.
WARNING!
Be ememelycarefulwith partially fallen trees which
are poorly supported.
When the tree hangs or for some other reason does
not fall completely, set the saw aside and pull the
tree down with a cable winch,
block
and tackle or
Sectioning Method
length of the guide bar requires use of either the
sectioning
or plunge-cut method. These methods
are extremely dangerous because they involve the
use
of
the nose
of
the guide bar
and c a n
result
in
kickback. Only property traine
24
~
For the sectioning method (fig.
24)
make the first cut
with the guide bar fanning in toward the hinge. Then,
using the bumper spike as a pivot, reposition the saw
for the next cut. Avoid repositioning the saw more than
necessary. When repositioning for the next cut, keep
the guide bar fully engaged in the kerf to keep the
felling cut straight. If the saw begins to pinch, insert a
wedge to open the cut. On the last cut, do not cut
the hinge.
Plunge-Cut Method
Timber having
a
diameter more than twice the length
of
the guide bar reauires the use of the plunge-cut
method before making the felling cut.
First, cut a large, wide notch. Make a plunge cut in the
center of the notch.
The plunge cut is made with the guide bar nose. Begin
the plunge cut by applying the lower portion of the
guide bar nose to the tree at an angle (fig. 25). Cut until
depth of the kerf is about the same as the width of the
guide bar (fig. 26). Next, align the saw in the direction
~~
in which the recess is to be cut. With the saw at full
throttle, insert the guide bar in the trunk (fig. 27).
Enlarge the plunge cut as shown in illustration (fig. 28)
28
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