PRO-PULSE 59595015 Manuel De L'utilisateur page 27

OPERATING INSTRUCTIONS
4) Notching Undercut – Make the notch 1/3 the diameter of the tree,
perpendicular to the direction of fall as illustrated in following figure. 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 is being made.
5) Felling Back Cut – Make the felling back cut at least 2 inches (50.8 mm)
higher than the horizontal notching cut as illustrated in following figure.
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 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 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, and then use the retreat path planned. Be alert for
overhead limbs falling and watch your footing.
6) 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 illustrated in following figure. Branches under tension
should be cut from the bottom up to avoid binding the chain saw.
7) Bucking a Log – Bucking is cutting a log into lengths. It is important to
ensure your footing is firm 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.
When the log is supported along its entire length as illustrated in the
following figure, it is cut from the top (overbuck).
When the log is supported on one end as illustrated, cut 1/3 of the
diameter from the underside (underbuck). Then make the finished
cut by overbucking to meet the first cut.
When the log is supported on both ends as illustrated, cut 1/3 of
the diameter from the bottom (underbuck). Then make the finished
cut by overbucking to meet the first cut.
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