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17 ― English
OPERATION
WARNING!
Periodically glance at
the top of the tree during the back cut to
assure the tree is going to fall in the desired
direction.
WARNING!
Do not fell trees during
periods of high wind or heavy precipitation.
Wait until the hazardous weather has ended.
WARNING!
If the tree starts to fall in
the wrong direction, or if the saw gets caught
or hung up during the fall, leave the saw and
save yourself!
WARNING!
Do not cut down trees
having an extreme lean or large trees with
rotten limbs, loose bark or hollow trunks.
Have these trees pushed or dragged down
with heavy equipment, then cut them up.
WARNING!
Do not cut trees or
branches near buildings, which may result in
serious injuries or property damage.
WARNING!
Check the tree for
damaged or dead branches that could fall
and hit you during felling.
DANGER!
Electrocution hazard. Do
not cut trees or branches near power lines
or electrical wires. Contact with power lines
or live electrical wires will result in serious
personal injury or death.
PROPER PROCEDURE FOR TREE
FELLING
See Figures 15a-15c, page vi
■ Felling a tree - When bucking and felling
operations are being performed by two or
more persons at the same time, the felling
operation should be separated from the
bucking operation by a distance of at least
twice the height of the tree being felled. Trees
should not be felled in a manner that would
endanger any person, strike any utility line, or
cause any property damage. If the tree does
make contact with any utility line, the utility
company should be notied immediately.
■ Operator should keep on the uphill side of
terrain as the tree is likely to roll or slide after
it is felled.
■ Plan and clear an escape path before
starting to cut. The escape path should
extend back and diagonally to the rear of
the expected line of fall. (See Fig. 15a)
Make sure there are no obstructions in your
planned path of retreat. Clear a path of safe
retreat from a point approximately 135° to the
planned line of fall on each side of the tree
(See Fig. 14b).
■ Before felling is started, consider the
natural lean of the tree, the location of larger
branches and the wind direction to judge
which way the tree will fall.
NOTCHING UNDERCUT
■ Make the notch 1/3 the diameter of the
tree, perpendicular to the direction of fall.
(Fig. 15b) Make the lower horizontal notching
cut (A) rst. This will help to avoid pinching
either the saw chain or the guide bar when
the upper angled second notching cut (B) is
being made.
FELLING BACK CUT
■ Make the felling back cut (C) at least
2 inches (50 mm) higher than the horizontal
notching cut. (Fig. 15b) Keep the felling back
cut parallel to the horizontal notching cut.
Make the felling back cut so enough wood
is left to act as a hinge (D). The hinge wood
keeps the tree from twisting and falling in the
wrong direction. Do not cut through the hinge.
WARNING! Never cut through to the notch
when making a back cut. The hinge controls
the fall of the tree. This is the section of wood
between the notch and back cut.
■ As the felling back cut gets close to the
hinge, the tree should begin to fall. If there
is any chance that the tree may not fall in
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