Ryobi RCS36HP, Оригинальное руководство пользователя

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Do not attempt to fell trees which are rotten or have been
damaged by wind, fire, lightning, etc. This is extremely
dangerous and should only be completed by professional
tree surgeons.
1. Notching undercut
Make the notch 1/3 the diameter of the tree, perpendicular
to the direction of the fall. Make the lower horizontal
notching cut first. This will help to avoid pinching either the
saw chain or the guide bar when the second notch is being
made.
2.
Felling-back cut
Make the felling-back cut at least 50 mm (2 in.) higher
than the horizontal notching cut. Keep the felling-back cut
parallel to the horizontal notching cut. Make the felling back
cut so enough wood is left to act as a hinge. The hinge
wood keeps the tree from twisting and falling in the wrong
direction. Do not cut through the hinge.
As the felling gets close to the hinge, the tree should begin
to fall. If there is any chance that the tree may not fall in
the desired direction or it may rock back and bind the saw
chain, stop cutting before the felling-back cut is complete
and use wedges of wood, plastic or aluminium to open the
cut and drop the tree along the desired line of fall.
When the tree begins to fall, remove the chainsaw from the
cut, stop the motor, put the chainsaw down, and use the
retreat path planned. Be alert for falling overhead limbs and
watch your footing.
1
3
2
5 cm (2 inch)
5 cm (2 inch)
REMOVING BUTTRESS ROOTS
A buttress root is a large root extending from the trunk of
the tree above the ground. Remove large buttress roots
before felling. Make the horizontal cut into the buttress first,
followed by the vertical cut. Remove the resulting loose
section from the work area. Follow the correct tree felling
procedure after removing the large buttress roots.
BUCKING A LOG
Bucking is cutting a log into lengths. It is important to
make sure your footing is firm and your weight is evenly
distributed on both feet. When possible, the log should be
raised and supported by the use of limbs, logs or chocks.
Follow the simple directions for easy cutting. When the log
is supported along its entire length, it is cut from the top
(overbuck).
When the log is supported on one end, cut 1/3 the diameter
from the underside (underbuck). Then make the finished
cut by overbucking to meet the first cut.
1
2
1/3
2/3
When the log is supported on both ends, cut 1/3 the
diameter from the top (overbuck). Then make the finished
cut by underbucking the lower 2/3 to meet the first cut.
2
1
2/3
1/3
When bucking on a slope always stand on the uphill side of
the log. To maintain control when “cutting through”, release
the cutting pressure near the end of the cut without relaxing
your grip on the chainsaw handles. Don’t let the chain
contact the ground. After completing the cut, wait for the
saw chain to stop before you move the chainsaw. Always
stop the motor before moving from tree to tree.
LIMBING A TREE
Limbing is removing the branches from a fallen tree. When
limbing, leave larger lower limbs to support the log off the
ground. Remove the small limbs in one cut. Branches
under tension should be cut from the bottom up to avoid
binding the chainsaw.
SPRINGPOLES
A springpole is any log, branch, rooted stump, or sapling
that is bent under tension by other wood so that it springs
back if the wood holding it is cut or removed.
On a fallen tree, a rooted stump has a high potential of