Ayce KSE 40/2400 Traduction De La Notice Originale page 117

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Make the notch 1/3 the diameter of the tree, perpendicular to the direction of falls as
illustrated in figure 18. Make the lower horizontal notching cut first. This will help to avoid
pinching either the saw chain or the guide bar when the second notch is being made.
• Make the felling back cut at least 50 mm higher than the horizontal notching cut as
illustrated in Figure 18. 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.
Description of felling:undercutting
116 , 117
fig.18