Tree Felling Techniques - Poulan Pro 330 Instruction Manual

• 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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