Stihl MS 180 C-BE Product Instruction Manual - Page 20

Buttress Roots, Gunning Sight, Conventional Cut, Open-face Technique

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English Buttress Roots Conventional Cut Open-face Technique If the tree has large buttress roots, cut into the largest buttress vertically first (horizontally next) and remove the resulting piece. Gunning Sight 001BA146 KN C C 001BA143 KN When making the felling notch, use the gunning sight on the shroud and housing to check the desired direction of fall: Position the saw so that the gunning sight points exactly in the direction you want the tree to fall. 001BA153 KN Felling notch (C) - determines the direction of the fall For a conventional cut: N Properly place felling notch perpendicular to the line of fall, close to the ground. N Cut down at approx. 45° angle to a depth of about 1/5 to 1/4 of the trunk diameter. N Make second cut horizontal. N Remove resulting 45° piece. Felling notch (C) - determines the direction of the fall For an open-face cut: N Properly place felling notch perpendicular to the line of fall, close to the ground. N Cut down at approx. 50° angle to a depth of approx.1/5 to 1/4 of the trunk diameter. N Make second cut from below at approx. 40 degree angle. N Remove resulting 90° piece. 18 MS 170, MS 170 C, MS 180, MS 180 C

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MS 170, MS 170 C, MS 180, MS 180 C
English
18
Buttress Roots
If the tree has large buttress roots, cut
into the largest buttress vertically first
(horizontally next) and remove the
resulting piece.
Gunning Sight
When making the felling notch, use the
gunning sight on the shroud and housing
to check the desired direction of fall:
Position the saw so that the gunning
sight points exactly in the direction you
want the tree to fall.
Conventional Cut
Felling notch (C) – determines the
direction of the fall
For a conventional cut:
N
Properly place felling notch
perpendicular to the line of fall,
close to the ground.
N
Cut down at approx. 45° angle to a
depth of about 1/5 to 1/4 of the trunk
diameter.
N
Make second cut horizontal.
N
Remove resulting 45° piece.
Open-face Technique
Felling notch (C) – determines the
direction of the fall
For an open-face cut:
N
Properly place felling notch
perpendicular to the line of fall,
close to the ground.
N
Cut down at approx. 50° angle to a
depth of approx.1/5 to 1/4 of the
trunk diameter.
N
Make second cut from below at
approx. 40 degree angle.
N
Remove resulting 90° piece.
001BA146 KN
001BA153 KN
001BA143 KN
C
C