Black & Decker CS1518, Instruction Manual

Page: 10 / 48

10
limbing
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. Branches
under tension should be cut from the bottom
up to avoid binding the chain saw as shown
in figure P. 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.
P
q
21
CUT FROM TOP
(OVERBUCK)
AVOID CUTTING EARTH
11
2
2nd CUT OVERBUCK
(2/3DIAMETER)
TO MEET 1st CUT
(TO AVOID PINCHING)
1st CUT UNDERBUCK
(1/3 DIAMETER)
AVOID SPLINTERING
r
1
2
S
2nd CUT UNDERBUCK
(2/3 DIAMETER)
TO MEET 1st CUT
(TO AVOID PINCHING)
1st CUT OVERBUCK
(1/3 DIAMETER)
TO AVOID SPLINTERING
Bucking
Bucking is cutting a felled tree or log into
lengths. How you should cut depends on
how the log is supported. Use a saw horse
(figure u) whenever possible.
Always start a cut with the chain running at
full speed.
• Place the bottom spike (21) of the chain
saw behind the area of the initial cut as
shown in figure q.
• 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 o) 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 o) 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.
• (figure r) 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 S) 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.
• (figure T) 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
2 (5cm)
INCHES
DIRECTION
OF FALL
2 (5cm)
INCHES
HINGE
NOTCH
FELLING BACK
CUT
o