Making Sapwood Cuts - Stihl 9 Instruction Manual

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•
For medium sized or larger trees
make cuts at both sides of the trunk,
•
at same height as subsequent
felling cut.
•
Cut to no more than width of guide
bar.
This is especially important in soft
wood in summer - it helps prevent
sapwood splintering when the tree
falls.

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Conventional and open-face technique:
•
Begin 1 to 2 inches higher than
center of felling notch
•
Cut horizontalIy towards the felling
notch
•
Leave approx. 1 / of diameter uncut.
10
This is the hinge
•
Do not cut through the hinge –
you could lose control of the
direction of the fall
Drive wedges into the felling cut where
necessary to control the fall.
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If the tip of the bar contacts a wedge,
it may cause kickback. Wedges should
be of wood or plastic – never steel,
which can damage the chain.
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•
Helps control the falling tree
•
Do not cut through the hinge -
you could lose control of the
direction of the fall
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In order to reduce the risk of personal
injury, never stand directly behind the
tree when it is about to fall, since part of
the trunk may split and come back
towards the operator (barber-chairing),
or the tree may jump backwards off the
stump. Always keep to the side of the
falling tree. When the tree starts to fall,
withdraw the bar, shut off the engine and
walk away on the preplanned escape
path. Watch out for falling limbs.