Instruction Manual

11.8.2 Preparing work area at base of tree
► Remove obstacles from work area at tree
base.
► Remove growth from tree base.
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► If the tree has large, healthy buttress roots:
Make vertical cut first and then a horizontal
cut, and remove the resulting piece.
11.8.3 Basic information on felling cut
Ø
1/10
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C
C
E
G
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 diame‐
ter.
E Felling cut
The tree is felled with the felling cut. The fell‐
ing cut is 1/10 of the trunk diameter (at least 3
cm) above the bottom of the felling notch.
F Stabilizing strap
The stabilizing strap supports the tree and
helps prevent it from falling prematurely. The
width of the stabilizing strap is 1/10 to 1/5 of
the trunk diameter.
G Holding strap
The holding strap supports the tree and helps
prevent it from falling prematurely. The width
of the holding strap is 1/10 to 1/5 of the trunk
diameter.
11.8.4 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.
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► 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 same height as bottom
of felling notch.
–
The width of the cuts is 1/10 of the trunk
diameter.
The trunk does not splinter when the tree falls.
11.8.5 Plunge cutting
Plunge cutting is a technique required for felling.
3.
1.
2.
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► Begin cut with the lower portion of the guide
bar nose – with chain running at full speed.
English 11 Operating the Saw
20 0458-788-0121-B. VA0.L20.