Hitachi Koki Tanaka TCS 33EDTP Manual De Instrucciones página 12

English
Shut off the saw when moving from one work place
to another.
Always cut at wide open throttle. A slow moving
chain can easily catch and force the saw to jerk.
○ Never use the saw with only one hand.
You cannot control the saw properly and you may
lose control and injure yourself severely.
Keep the saw body close to your body to improve
control and reduce strain.
When cutting with the bottom part of the chain
the reactive force will pull the saw away from you
towards the wood you are cutting.
The saw will control the feeding speed and sawdust
will be directed towards you. (Fig. 20)
○ When cutting with the upper part of the chain the
reactive force will push the saw towards you and
away from the wood you are cutting. (Fig. 21)
○ There is a risk of kickback if the saw is pushed far
enough so that you begin to cut with the nose of the
bar.
The safest cutting method is to cut with the bottom
part of the chain. Sawing with the upper part makes it
much more diffi cult to control the saw and increases
the risk of kickback.
○ In case the chain locked, immediately release the
throttle trigger.
If the throttle trigger keeps rotating at high speed with
the chain locked, the clutch will overheat causing
trouble.
NOTE
Always keep the spiked bumper face to a tree,
because the chain may suddenly be drawn into a
tree.
12
Fig. 20
Fig. 21
FELLING
Felling is more than cutting down a tree. You must also
bring it down as near to an intended place as possible
without damaging the tree or anything else.
Before felling a tree, carefully consider all conditions
which may eff ect the intended direction, such as:
Angle of the tree. Shape of the crown. Snow load on
the crown.
Wind conditions. Obstacles within tree range (e.g., other
trees, power lines, roads, buildings, etc.).
WARNING
○ Always observe the general conditions of the tree.
Look for decay and rot in the trunk which will make it
more likely to snap and start to fall before you expect
it.
○ 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. 22)
19. Felling direction
20. 45° minimum notch opening
21. Hinge
22. Felling cut
Never saw completely through the trunk. Always leave
a hinge.
19
20
21
22
Fig. 22