Stihl MSA 120 C, MSA 140 C Notice D'emploi page 80

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12.4.2 Preparing work area at base of tree
► Remove obstacles from work area at tree base.
► Remove growth from tree base.
► If the tree has large, healthy buttress roots: Make vertical
cut first and then a horizontal cut, and remove the
resulting piece.
12.4.3 Cutting the felling notch
The felling notch determines the direction in which the tree
falls. Country-specific standards for making the felling notch
must be observed.
► Position the saw so that the felling notch is an right angles
to the direction of fall and the saw is close to the ground.
► Make the horizontal cut.
► Make the angle cut at 45° to the horizontal cut.
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► If the wood is sound and long-fibered: Observe the
following points when making sapwood cuts:
– The cuts must be the same at both sides.
– The cuts must be at the same height as the bottom of
the felling notch.
– The width of the cuts is 1/10 of the trunk diameter.
The trunk does not splinter when the tree falls.
12.4.4 Basic information on felling cut
C
90°
C Felling notch
The felling notch determines the direction of fall.
D Hinge
The hinge helps control the falling tree. The width of the
hinge is 1/10 of the trunk diameter.
E Felling cut
The tree is felled with the felling cut.
12 Operating the Saw
C E
1/10
D
G
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