Stihl MS 261 C-M Instruction Manual page 11

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
With the help of the gunning sight on the
shroud and fan housing of the chain
saw, it is possible to check the direction
of fall when cutting the felling notch.
When making the felling notch, orient
the chain saw so that the gunning sight
points precisely in the direction in which
you want the tree to fall.
MS 261 C-M
Several possibilities are permissible
when it comes to the sequence of
horizontal and diagonal cuts – observe
national regulations with regard to felling
technique.
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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