Hitachi Koki CS 40Y Mode D'emploi page 16

English
strike any utility line or cause any property damage.
If the tree does make contact with any utility line, the
company should be notifi ed immediately.
The chain saw operator should keep on the uphill
side of the terrain as the tree is likely to roll or slide
downhill after it is felled.
An escape path should be planned and cleared as
necessary before cuts are started. The escape path
should extend back and diagonally to the rear of the
expected line of fall as shown in Fig. 20.
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.
Remove dirt, stones, loose bark, nails, staples and
wire from the tree.
Felling direction
Danger zone
Fig. 20
Notching undercut:
Make the notch 1/3 the diameter of the tree,
perpendicular to the direction of falls as shown in
Fig. 21. Make the lower horizontal notching cut fi rst.
This will help to avoid pinching either the saw chain or
the guide bar when the second notch is being made.
2" (50 mm)
Hinge
Felling back cut
2" (50 mm)
Fig. 21
16
Escape
route
45°
Danger
zone
45°
Escape
route
Direction of fall
1/3
45°
Notch
CAUTION
● Trees should not be felled in a manner that would
endanger any person, strike any utility line or
cause any property damage.
● Be sure to stand on the uphill side of the terrain
as the tree is likely to roll or slide downhill after it
is felled.
Felling back cut:
Make the felling back cut at least 2" (50 mm) higher
than the horizontal notching cut as shown in Fig.21.
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.
As the felling gets close to the hinge, the tree should
begin to fall. If there is any chance that the tree may
not fall in 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 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.
Limbing a tree:
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
as shown in Fig. 22. Branches under tension should
be cut from the bottom up to avoid binding the chain
saw.
Limb cut
Keep work off ground leave support limbs until log is cut
Fig. 22
Bucking a log:
Bucking is cutting a log into lengths. It is important
to make sure your footing is fi rm and your weight is
evenly distributed on both feet. When possible, the log
should be raised and supported by the use of limbs,
logs or chocks.