Stihl MSA 160 C Instruction Manual page 61

Preparing the work area at the trunk
Clear the work area at the trunk of
–
branches, brush and other
obstacles – secure footing for all
workers
Carefully clear the base of the trunk
–
(e.g., with an axe) – sand, stones
and other foreign objects will dull the
saw chain
Remove large buttresses: remove
–
the largest buttress first – saw first
vertically, then horizontally – only if
the tree is in sound condition
Making a felling notch
Several possibilities are permissible
when it comes to the sequence of
horizontal and diagonal cuts – observe
national regulations with regard to felling
technique.
MSA 160 C
C
C
The felling notch (C) determines the
direction of fall.
STIHL recommends the following
procedure:
Make a horizontal cut – in doing so,
N
check the direction of fall with the
gunning sight
Start a diagonal cut at an
N
approx. 45° angle
Check the felling notch – then
N
correct the felling notch, if
necessary
Important:
Felling notch at right angle to
–
direction of fall
As close to the ground as possible
–
cut to a depth of approx. 1/5 to 1/3
–
of the diameter of the trunk
Sapwood cuts
With long-fibered wood, sapwood cuts
prevent the sapwood from splintering
when felling the trunk – saw both sides
of the trunk at the level of the felling
notch base to approx. 1/10 of the
diameter of the trunk – with thicker
trunks, not more than the width of the
guide bar.
Do not use sapwood cuts on diseased
trees.
English
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