Tanaka TCS 33EB Mode D'emploi page 13

○ Look for dry branches, which may break and hit you
when you are working.
Always keep animals and people at least twice the
tree length away while felling. Clear away shrubs
and branches from around the tree.
Prepare a path of retreat away from the felling
direction.
Basic rules for felling trees
Normally the felling consists of two main cutting
operations, notching and making the felling cut. Start
making the upper notch cut on the side of the tree facing
the feeling direction. Look through the kerf as you saw
the lower cut so you do not saw too deep into the trunk.
The notch should be deep enough to create a hinge of
suffi cient width and strength. The notch opening should
be wide enough to direct the fall of the tree as long as
possible. Saw the felling cut from the other side of the
tree between one and two inches (3–5 cm) above the
edge of the notch. (Fig. 24)
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23. Felling direction
24. 45° minimum notch opening
25. Hinge
26. Felling cut
Never saw completely through the trunk. Always leave
a hinge.
The hinge guides the tree. If the trunk is completely
cut through, you lose control over the felling direction.
Insert a wedge or a felling lever in the cut well before
the tree becomes unstable and starts to move. This
will prevent the guide bar from binding in the felling cut
if you have misjudged the falling direction. Make sure
no people have come into the range of the falling tree
before you push it over.
Felling cut, trunk diameter more
than twice guide bar length
Cut a large, wide notch. Then cut a recess into the center
of the notch. Always leave a hinge on both sides of the
center cut. (Fig. 25)
23
24
25
Fig. 24
Complete the felling cut by sawing around the trunk as
in the Fig. 26.
WARNING
These methods are extremely dangerous because
they involve the use of the nose of guide bar and can
result in kickback.
Only properly trained professionals should attempt
these techniques.
Limbing
Limbing is removing the branches from a feller tree.
WARNING
A majority of kickback accidents occur during
Iimbing.
Do not use the nose of the guide bar. Be extremely
cautious and avoid contacting the log, other limbs or
objects with the nose of the guide bar. Be extremely
cautious of limbs under tension. They can spring
back towards you and cause loss of control resulting
in injury. (Fig. 27)
Stand on the left side of the trunk. Maintain a secure
footing and rest the saw on the trunk. Hold the saw
close to you so that you are in full control of it. Keep
English
Fig. 25
Fig. 26
Fig. 27
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