Poulan Pro 220 Instruction Manual page 11

• Begin c utting with thesawframe
against the log,
• Keep the engine atfull speed the entire
time y ou ere cutting.
• Allowthechaintocutforyou, Exertonly
light downward pressure, Ifyou force
the c ut, damage to the bar, chain, or e n-
gine c an result.
• Release the throttle trigger as soon as
the cut i scompleted, allowing the en-
gine t oidle. I fyou run the saw atfull
throttle without acutting load, unneces-
sary w ear can occur tothe chain, bar,
and e ngine.
• To avoid losing control when cut is com-
plete, do not put pressure on saw at e nd
ofcut.
• Stop t he 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, 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 bad
weather such as rain, snow, or strong winds,
etc.
• Carefully plan your sawing operation in ad-
vance.
• Cleartheworkarea, You needacieararee
all around the tree so you can have secure
footing.
• 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 h_clude:
• The wh_d 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. 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 2-1/2 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 diag-
onal to the line of fall.
?z Plan a clear retreat path
.... (}--====_- Direction of Fall t
45 ° /
FELLING LARGE TREES
(6 inches in diameter or _arger)
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 fail. 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, Ifus-
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 1/3 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 (felling) cut here, 2 inches
above center of notch.
First cut } 2'; I /
= ÷ I/
• After removing the cutout of wood, 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 will leave enough uncut wood
between the felling cut and the notch to
form a hinge, This hinge will help prevent
the tree from falling in the wrong direction.
Hinge holds tree on stump and helps
control fall
Closing of
notch
Opening
of felling
7
NOTE: Before felling cut is complete, use
wedges to open the cut when 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 felling cut,
or movement in the upper branches,
• As tree starts to fall, stop sew, put it down,
and get away quickly on your planned re-
treat path.
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