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18 ― English
OPERATION
desired direction or that it may rock back
and bind the saw chain, stop cutting and
insert wedges in the cut (Fig. 15c) so as to
open it wider and drop the tree in the
desired line of fall.
■ When the tree begins to fall, remove the
chain bar from the cut, stop the chainsaw
motor, put the chainsaw down, and move
away from the tree along the planned retreat
path. Be alert for overhead limbs falling and
watch your footing.
■ Limbing is removing the branches from a
fallen tree. When limbing leave larger lower
limbs to support the log off the ground.
Remove the small limbs in one cut. (Fig. 15d)
Branches under tension should be cut from
the bottom up to avoid binding the chain bar.
REMOVING BUTTRESS ROOTS
See Figure 16, page vi
A buttress root is a large root extending from
the trunk of the tree above the ground. Saw
through the buttress root with a vertical cut.
Remove the resulting loose section from
the work area. Follow the correct tree felling
procedure as stated in Proper Procedure for
Tree Felling after you have removed the large
buttress roots.
BUCKING
See Figure 17, page vi
Bucking is the term used for cutting a fallen
tree to the desired log length.
■ Always make sure your footing is secure
and your weight is distributed evenly on both
feet.
■ Cut only one log at a time.
■ Support small logs on a saw horse or
another log while bucking.
■ Keep a clear cutting area. Make sure no
objects can contact the guide bar nose and
chain during cutting, because this can cause
kickback.
■ When bucking on a slope, always stand
on the uphill side of the log. To maintain
complete control of the chainsaw when
cutting through the log, release the cutting
pressure near the end of the cut without
relaxing your grip on the chainsaw handles.
Do not let the chain contact the ground. After
completing the cut, wait for the saw chain to
stop before you move the chainsaw. Always
stop the motor before moving from tree to
tree.
BUCKING WITH A WEDGE
See Figure 18, page vi
If the wood diameter is large enough for you
to insert a bucking wedge without touching
the chain, you should use the wedge to hold
the cut open to prevent pinching.
OVERBUCKING
See Figure 20, page vii
Begin on the top side of the log with the
bottom of the saw against the log; exert light
pressure downward. Note that the saw will
tend to pull away from you.
UNDERBUCKING
See Figure 21, page vii
Begin on the under side of the log with the
top of the saw against the log; exert light
pressure upward. During under bucking,
the saw will tend to push back at you. Be
prepared for this reaction, and hold the saw
rmly to maintain control.
BUCKING LOGS UNDER STRESS
See Figure 19, page vi
Make the rst bucking cut 1/3 of the way
through the log, and nish with a 2/3 cut on
the opposite side. As you cut the log, it will
tend to bend. The saw can become pinched
or hung in the log if you make the rst cut
deeper than 1/3 of the diameter of the log.
Give special attention to logs under stress to
prevent the bar and chain from pinching.
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