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Begin the felling cut slighty higher than the felling notch
and on the opposite side of the tree (g. 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 (g. 23).
Leave approximately 1/10 of the tree diameter uncut!
This is the hinge (g. 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 extremely careful with 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
tractor. If you try to cut it down with your saw, you
may be injured.
Sectioning Method
WARNING!
Felling a tree that has a diameter greater than the
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 can result
in kickback. Only properly trained professionals
should attempt these techniques.
For the sectioning method (g. 24) make the rst 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 (g. 25). Cut until
depth of the kerf is about the same as the width of the
guide bar (g. 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 (g. 27).
Enlarge the plunge cut as shown in illustration (g. 28)