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•
Release
the throttle trigger as soon as
the cut is completed,
allowing
the en-
gine to idle. If you run the saw at full
throttle without a cutting load, unneces-
sary wear can occur to the chain, bar
and engine.
•
To avoid Iosh_g control when cut is com-
plete, do not put pressure
on saw at end
of cut.
• Stop the engine before setting the saw down.
TREE
FELLING
TECHNIQUES
WAR NIN G:
Check for broken or dead
branches
which can fall while cutting causing
serious
injury.
Do not cut near buildings
or
electrical wires if you do not know the direction
of tree fall, at night since you will not be able to
see well, or during bad weather such as rain,
snow, or strong winds, etc. If tree makes con-
tact with any utility line, the utility company
should be notified
immediately.
• Carefully
plan your sawing operation
in ad-
vance.
• Cleartheworkarea.
You needacteararea
all around the tree so you can have secure
footing.
• The chain
saw operator
should
keep on
the uphill side of the terrain as the tree is
likely to roll or slide downhill
after it is felled.
• Study the natural conditions that can cause
the tree to fall in a particular direction.
Natural
conditions
that can cause a tree to
fall in a particular
direction
include:
• The wind direction
and speed.
• The lean of the tree. The lean of a tree
might
not be apparent
due to uneven
or
sloping terrain.
Use a plumb or level to de-
termine the direction
of tree lean.
• Weight and branches
on one side.
• Surrounding
trees and obstacles.
Look for decay and rot. If the trunk is rotted, it
can snap and fall toward the operator.
Make sure there is enough room for the tree to
fall, Maintain a distance of 2-1/2 tree lengths
from the nearest person or other objects, En-
gine noise can drown out a warning call.
Remove dirt, stones, loose bark, nails, staples,
and wire from the tree where cuts are to be
made,
Plan a clear retreat path to the rear and diago-
nal to the line of fall.
_1_ x2
Plan a clear retreat path
%
;_....
O"_"
Direction
of Fall
45 ° /
FELLING
LARGE
TREES
(6 inches in diameter
or larger)
The notch method is used to fell large trees.
A notch is cut on the side of the tree in the de-
sired direction
of fall. After
a felling
cut is
made on the opposite
side of tree, the tree
will tend to fail into the notch.
First cut
Notch_
Seoon_t_
NOTE:
If the tree has large buttress
roots,
remove them before making the notch,
If us-
ing saw to remove
buttress
roots, keep saw
chain from contacting
ground to prevent dull-
ing of the chain.
NOTCH
CUT
AND
FELLING
THE
TREE
• Make notch
cut by cutting
the top of the
notch first. Out through
1/3 of the diameter
of the tree. Next complete
the notch by cut-
ting the bottom
of the notch, See illustra-
tion. Once
the notch
is cut remove
the
notch of wood from the tree.
Final cut here 2 inches
above center of notch.
• After removing
the wood from the notch,
make the felling cut on the opposite
side of
the notch. This is done by making
a cut
about two inches higher than the center of
the notch.
This wilt leave
enough
uncut
wood between the felling cut and the notch
toform a hinge. This hingewill
help prevent
the tree from falling in the wrong direction.
Hinge holds tree on stump and helps
control
fall
_
Opening
_ii_,? _ _,_
of felling
Closing of_,',i q,\
notch
NOTE:
Before felling cut is complete,
use
wedges
to open
the cut if necessary
to
control the direction
of fall. To avoid kickback
and chain
damage,
use
wood
or plastic
wedges,
but never steel or iron wedges.
• Be alert to signs that the tree is ready to
fall: cracking
sounds,
widening
of the fell-
ing
cut,
or
movement
in
the
upper
branches.
• As tree starts to fall, stop saw, put it down,
and get away quickIy
on your planned
re-
treat path.
• DO NOT
cut down a partially
fallen tree
with your saw. Be extremely
cautious with
partially
fallen trees
that may
be poorly
supported.
When a tree doesn't fall com-
pletely, set the saw aside and pull down the
tree with a cable winch, block and tackle,
or tractor.
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