Electrolux Home Products Poulan 1950 Manual De Instrucciones página 11

Allow the chain t ocutforyou. Exert
only light downward pressure. Ifyou
force thecut,damage to thebar,
chain, orengine can result.
Release the throttle trigger as soon a s
the cut i scompleted, allowing the en-
gine toidle.Ifyou run the saw atfull
throttle without acutting load, unnec-
essary wear c an occur tothe chain,
bar, and engine.
Toavoid l osing control when cutis
complete, donot p ut p ressure onsaw
atend ofcut.
• Stop theengine b efore s etting t hesaw
down a fter cutting.
TREE FELLING TECHNIQUES
_WARNING:
Check for broken or
dead branches which can fall while cutting
causing serious injury. Do not cut near build-
ings or electrical wires if you do not know the
direction of tree fall, nor cut at night since you
will not be ale to see well, nor during bed
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.
• Carefully planyoursawingoperetion inad-
vance.
• Clear the work area. You need a clear area
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 e 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 Ifthetrunk is rotted,
it can snap and fall toward the operator.
Check for broken or dead branches which
can fall on you while cutting.
Make sure there is enough room for the tree to
fall. Maintain a distance of 2-1J2tree lengths
from the nearest person or other objects. En-
gine noise can drown OL_a warning call.
Remove dirt, stones, loose bark, nails, sta-
ples, and wire from the tree where cuts are to
be made.
Plan a clear retreat path to the rear and diag-
onal to the line of fall.
_ Plan a clear retreat path
;_ .... O"_'- Direction of Fall
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 fall into the notch.
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. Cut through 1/3of 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 (felling) cut here. 2 in-
ches above center of notch.
I//
Notch " i"
Second cut
• After removing the wood from the notch,
make the felling cut on the opposite side of
the notch. This is done by making e cut
about two inches higher than the center of
the notch. This will leave enough uncut
wood between the felling cut and the notch
to form e hinge. This hinge will help pre-
vent the tree from falling in the wrong direc-
tion.
Hinge holds tree on stump and helps
control fall
Opening
of felling
cut
Closing of
notch
NOTE: Before felling cut is complete, use
wedges to open the cut if necessary to
control the direction of fall. To avoid kickback
end 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.
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