Oregon CS1200-091 User Manual

18
Operating the Chainsaw
Chainsaw Model CS1200-091
Notching Undercut
• First, make the notch / the diameter of the
tree perpendicular to the direction of fall.
Make the lower horizontal notching undercut
first (). This will help to avoid pinching of
either the saw chain or the guide bar when the
second cut () is being made (Fig. ).
Felling Back Cut
• Second, make the felling back cut at least
 mm ( in) higher than the horizontal
notching undercut (Fig. ). Keep the felling
back cut parallel to the horizontal notching
undercut.
• 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.
• 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 aluminium to open
the cut and drop the tree along the desired
line of fall.
• When the tree begins to fall, remove the
chainsaw from the cut, stop the motor, put
the chainsaw 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 chainsaw out of control
resulting in personal injury. Always be
alert for wood under tension which may
strike the operator or chainsaw when cut.
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 chainsaw
(Fig. ).
NOTCHING UNDERCUT
DIRECTION
OF FALL
NOTCH
(1)
(2)
FIG. 11
FELLING BACK CUT
FELLING
BACK CUT
HINGE
DIRECTION
OF FALL
NOTCH
50 MM
(2 IN)
50 MM
(2 IN)
FIG. 12
TREE LIMBING
LIMB CUT
KEEP WORK OFF GROUND
LEAVE SUPPORT LIMBS UNTIL LOG IS CUT
FIG. 13

Oregon CS1200-091 Specifications

General

Brand	Oregon
Model	CS1200-091
Category	Chainsaw
Language	English