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11
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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, unnec-
essary wear can occur to the chain,
bar, and engine.
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To avoid losing control when cut is
complete, do not put pressure on saw
at end of cut.
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Stop the engine before setting the saw
down after cutting.
TREE FELLING TECHNIQUES
WARNING:
Check for broken or
dead branches which can fall while cutting
causing serious injury. D onot cut near build-
ings or electrical wires if you do not know the
direction of tree fall, nor cut atnight since you
will not be ale to see well, nor during bad
weather such as rain, snow, or strong winds,
etc. If the tree makes contact with any utility
line, the utility company should be notified
immediately.
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Carefully plan your sawing operation in ad-
vance.
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Clear the work area. You need a clear area
all around the tree so you can have secure
footing.
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The chain saw operator should keep on
the uphill side of the t errain as the tree is
likely to roll or slide downhill after it is felled.
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Study the nat ural conditions that can cause
the tree to fall in a particular d irection.
Natural conditions that can cause a tree to
fall in a particular direction include:
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The wind direction and speed.
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The lean of the tree. The lean of a tree
might not be apparent due to uneven or
sloping terrain. Use a plumb orlevel to de-
termine the direction of tree lean.
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Weight and branches on one side.
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Surrounding trees and obstacles.
Look for decay and rot. If the trunk is rotted,
it can snap and fall toward the operator.
Check for broken or dead branches which
can fall on you while cutting.
Make s ure there i s enough room for the tree
to fall. Maintain a distance of
2-1/2
tree
lengths from the nearest person or other ob-
jects. Engine noise can drown out a warning
call.
Remove dirt, stones, loose bark, nails, sta-
ples, and wire from the tree where cuts areto
be made.
Plan a clear retreat path to the rear and diag-
onal to the line of fall.
Direction of Fall
45
_
Plan a clear retreat path
FELLING LARGE TREES
(6 inches in diameter or larger)
The notch method is used t o fell large trees.
A notch is cut on the side ofthe tree in thede-
sired direction of fall. After a felling cut is
made on the opposite side of tree, the tree
will tend to fall into the notch.
NOTE:
If the tree has large buttress
roots, remove them before making the
notch. If using saw to remove buttress
roots, keep saw chain from contacting
ground to prevent dulling of the chain.
NOTCH CUT AND FELLING THE
TREE
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Make notch cut by cutting the top of the
notch first. Cut through
1/3
of the diameter
of the tree. Next complete the notch bycut-
ting the bottom of the notch. See illustra-
tion. Once the notch is cut remove the
notch of wood from the tree.
Notch
First cut
Second cut
Final (felling) cut here. 2 in-
ches above center of notch.
Hinge
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After removing the wood from the notch,
make the felling cut on the opposite side of
the notch. This is done by makinga cutabout
two inches higher than the center of the
notch. This w ill leave enough uncut wood
betw e e n the felling cut an d the notc h to for m
a hinge. This hinge will help prevent the tree
from falling in the wro n g direc tion .
Opening
of felling
cut
Closing of
notch
Hinge holds tree on stump and helps
control fall
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.
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Be al ert to signs that the tree is ready to
fall: cracking sounds, widening of the fell-
ing cut, or movement in the upper
branches.
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As tree starts to fall, stop saw, put it down,
and get away quickly on your planned re-
treat path.