Felling A Tree; Bucking A Log - Ryobi RCS1935B Originalanleitung

because the wood is incorrectly supported, which forces
the cut to close under compression, thereby pinching the
blade. If adjusting the support does not release the bar and
chain, use wooden wedges or a lever to open the cut and
release the saw. Never try to start the chainsaw when the
guide bar is already in a cut or kerf.
SKATING/BOUNCING
When the chainsaw fails to dig in during a cut, the guide
bar can begin hopping or dangerously skidding along the
surface of the log or branch, possibly resulting in the loss
of control of the chainsaw. To prevent or reduce skating or
bouncing, always use the saw with both hands. Make sure
that the saw chain establishes a groove for cutting.
Never cut small, fl exible branches or brushes with your
chainsaw. Their size and fl exibility can easily cause the
saw to bounce towards you or bind up with enough force
to cause a kickback. The best tool for that kind of work is
a hand saw, pruning shears, an axe or other hand tools.

FELLING A TREE

When bucking and felling operations are being performed
by two or more persons at the same time, the felling
operations should be separated from the bucking operation
by a distance of at least twice the height of the tree being
felled. Trees should not be felled in a manner that would
endanger any person, strike any utility line, or cause any
property damage. If the tree does make contact with any
utility line, the company should be notifi ed immediately.
The chainsaw operator should keep on the uphill side of
the terrain as the tree is likely to roll or slide downhill after
it is felled.
An escape path should be planned and cleared as
necessary before cuts are started. The escape path should
extend back and diagonally to the rear of the expected line
of fall.
Before felling starts, consider the natural lean of the tree,
the location of larger branches, and the wind direction to
judge which way the tree will fall.
Remove dirt, stones, loose bark, nails, staples, and wire
from the tree.
Do not attempt to fell trees which are rotten or have been
damaged by wind, fi re, 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.
4 | English
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.
5 cm (2 inch)
2
1
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 fi rst,
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 fi rm 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 fi nished
cut by overbucking to meet the fi rst cut.
5 cm (2 inch)
3