Notching Undercut; Felling Back Cut; Limbing A Tree - Oregon CS300 Manuel D'instruction

OPERATING THE SAW

NOTCHING UNDERCUT

• First, make the notch 1/3 the diameter of
the tree perpendicular to the direction
of fall . Make the lower horizontal
notching undercut first (1) . This will help
to avoid pinching of either the saw
chain or the guide bar when the second
cut (2) is being made (Fig . 34) .
FIG. 34
NOTCHING UNDERCUT
DIRECTION
OF FALL
(2)
NOTCH
(1)

FELLING BACK CUT

• Second, make the felling back cut at
least 2 in (50 mm) higher than the
horizontal notching undercut (Fig . 35) .
Keep the felling back cut parallel to the
horizontal notching undercut .
FIG. 35
FELLING BACK CUT
2 IN
(50 MM)
DIRECTION
OF FALL
NOTCH
HINGE
• 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 .
• As the felling cut gets close to the hinge,
the tree should begin to fall .
26
• 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 back cut
is complete and use wedges of wood,
plastic or aluminum 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 footing .

LIMBING A TREE

CAUTION: LIMBS UNDER TENSION
CAN "SPRING BACK" AND CONTACT
THE OPERATOR OR THROW THE
CHAIN SAW OUT OF CONTROL
RESULTING IN PERSONAL INJURY.
Always be alert for wood under tension which
may strike the operator or chain saw when
cut.
Limbing is removing the branches from a
fallen tree .
• When limbing, leave larger lower limbs
to support the log off the ground .
FELLING
BACK CUT
• Remove the small limbs in one cut .
• Branches under tension should be cut
from the bottom up to avoid binding
2 IN
(50 MM)
the chain saw (Fig . 36) .
FIG. 36
LIMB CUT
KEEP WORK OFF GROUND
LEAVE SUPPORT LIMBS UNTIL LOG IS CUT
OREGON® Cordless Tool System
CHAIN SAW MODEL CS300
TREE LIMBING
AA 1214 - F/N 573259