Hitachi Koki Tanaka TCS 33EDTP Manual De Instrucciones página 13

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. 23)
Complete the felling cut by sawing around the trunk as
in the Fig. 24.
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. 25)
Fig. 23
Fig. 24
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
well away from the chain. Move only when the trunk is
between you and the chain. Watch out for spring back
of limbs under tension.
LIMBING THICK BRANCHES
When limbing thick branches, the guide bar may get
pinched easily. Branches under tension often snap up,
so cut troublesome branches in small steps. Apply the
same principles as for cross cutting. Think ahead and be
aware of the possible consequences of all your actions.
CROSS CUTTING/BUCKING
Before starting to cut through the log, try to imagine what
is going to happen. Look out for stresses in the log and
cut through it in such a manner that the guide bar will
not get pinched.
CROSS CUTTING LOGS, PRESSURE
ON TOP
Take a fi rm stance. Begin with an upper cut. Do not cut
too deeply, about 1/3 of the log diameter is enough.
Finish with a bottom cut.
The saw cuts should meet. (Fig. 26)
23. Relieving cut
24. Cross cut
25. Pressure on top
26. Pressure side
27. Tension side
28. Relative depth of saw cuts
English
Fig. 25
25
23
26
27
24
28
Fig. 26
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