Stihl MSA 300.0 Notice D'emploi page 19

7 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling
► Next, establish at least two clear paths of
escape (B) and remove any obstacles such as
brush, small trees and other vegetation. These
paths should lead away from the planned
direction of the tree's fall (A) at a 45° angle
from the expected fall line. Place all tools and
equipment a safe distance away from the tree,
but not on the escape paths.
7.6.3 Conventional Notch
For a conventional notch:
C
► The felling notch determines the direction of
the tree's fall. Make the felling notch perpen‐
dicular to the line of fall you have determined,
close to the ground.
► Be aware of conditions such as wind, limb and
foliage structure, tree lean, the slope of the
terrain and other factors that could alter the
direction of fall.
► Cut down at a 45° angle to a depth of approxi‐
mately 1/5 to 1/4 of the trunk diameter.
1
When making the notch, use the gunning
sight (1) on the saw to check the desired direc‐
tion of fall:
► Place the felling notch perpendicular to the
line of fall. Position the saw so that the gun‐
ning sight (1) points exactly in the direction
you want the tree to fall.
► Make a horizontal cut that meets the bottom of
the first cut.
► Remove the resulting 45° piece. The size of
the wedge will vary by tree size. The larger the
tree, the larger the wedge.
0458-009-8202-B
7.6.4
For an open-faced notch:
► The felling notch determines the direction of
C
► Be aware of conditions such as wind, limb and
► Cut down at a 50° angle to a depth of approxi‐
► Make a second cut that meets the bottom of
► Remove the resulting 90° piece. The size of
7.6.5
Sapwood cuts help prevent soft woods in sum‐
mer from splintering when they fall:
► Make cuts at both sides of the trunk, at the
► Cut no more than the width of guide bar.
7.6.6
■ If the tip of the bar contacts a wedge that has
Open-faced Notch
C
the tree's fall. Make the felling notch perpen‐
dicular to the line of fall you have determined,
close to the ground.
foliage structure, tree lean, slope of the terrain
and other factors that could alter the direction
of fall.
mately 1/5 to 1/4 of the trunk diameter.
the first cut from below at a 40° angle.
the wedge will vary by tree size. The larger the
tree, the larger the wedge.
Sapwood Cuts
same height as the subsequent felling back
cut.
Felling Back Cut
WARNING
been used to help keep the kerf or cut open, it
may cause kickback. Wedges should be of
wood or plastic and never steel, which can
damage the chain.
English
C
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