Black and Decker LCS1020 Manual De Instrucciones página 13

before cuts are started. The retreat path
should extend back and diagonally to
the rear of the expected line of fall.
• 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. Have
wedges (wood, plastic or aluminum)
and a heavy mallet handy.
Remove dirt, stones, loose bark, nails,
staples, and wire from the tree where the
felling cuts are to be made.
• figure l- Notching Undercut - Make
the notch 1/3 of the diameter of the tree,
perpendicular to the direction of the fall.
Make the lower horizontal notching cut
first. This will help to avoid pinching of
either the saw chain or the guide bar when
the second notch cut is being made.
• (figure l) Felling Back Cut - Make the
felling back cut at least 2 inches (51mm)
higher than the horizontal notching cut.
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. The hinge wood keeps the
tree from twisting and falling in the wrong
direction. Do not cut through the hinge.
• (figure l) As the felling cut gets close
to the hinge the tree should begin to
fall. If there is any chance that the tree
may not fall in the desired direction or it
may rock back and bind the saw chain,
stop cutting before the felling cut is
complete and use wedges to open the
cut and drop the tree along the desired
line of fall. When the tree begins to fall
remove the chain saw from the cut, stop
the motor, put the chain saw down, then
use the retreat path planned. Be alert for
overhead limbs falling and watch your
footing.
k
retreat
45°
l
2 (5cm)
dIreCtIOn
InChes
OF Fall
nOtCh
dIreCtIOn
OF
Fall
tree
FellIng BaCK
Cut
2 (5cm)
InChes
hInge
liMBing
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. Branches under
tension should be cut from the bottom of
the branch towards the top to avoid binding
the chain saw as shown in figure M.
Trim limbs from opposite side keeping
tree stem between you and saw. Never
make cuts with saw between your legs or
straddle the limb to be cut.
M
Bucking
warning:
time users should practice cutting on a
saw horse.
Cutting a felled tree or log into lengths.
How you should cut depends on how the
log is supported. Use a saw horse
(figure n) whenever possible. Always start
a cut with the chain running at full speed.
• Place the bottom spike (19) of the chain
saw behind the area of the initial cut as
shown in figure o.
• Turn the chain saw on then rotate the
chain and bar down into the tree, using
the spike as a hinge.
• Once the chain saw gets to a 45 degree
angle, level the chain saw again and
repeat steps until you cut fully through.
• when the tree is supported along its
entire length, make a cut from the top
(overbuck), but avoid cutting the earth as
this will dull your saw quickly.
• figure p- when supported at one end
First, cut 1/3 the diameter from the underside
(underbuck). Then make the finished cut by
overbucking to meet the first cut.
• figure q- when supported at both ends
First, cut 1/3 down from the top overbuck.
Then make the finished cut by underbucking
the lower 2/3 to meet the first cut.
• when on a slope
Always stand on the uphill side of the
log. When "cutting through", to maintain
complete control release the cutting
pressure near the end of the cut without
relaxing your grip on the chain saw
handles. Don't let the chain contact the
ground. After completing the cut, wait for
the saw chain to stop before you move
the chain saw. Always stop the motor
before moving from cut to cut.
13
recommend that first