Husqvarna T540 XP II Manuel D'utilisation page 32

• Weight of snow
You may find you are forced to let the tree-top fall in its
natural direction because it is impossible or dangerous to
try to make it fall in the direction you first intended.
Another very important factor, which does not affect the
felling direction but does affect your safety, is to make sure
the tree has no damaged or dead branches that might
break off and hit you during felling.
WARNING! During critical felling
!
operations, hearing protectors should be
lifted immediately when sawing is
completed so that sounds and warning
signals can be heard.
Topping a tree
Topping a tree is done using three cuts. First you make
the directional cuts, which consist of the top cut and the
bottom cut, then you finish with the felling cut. By placing
these cuts correctly you can control the felling direction
very accurately.
Directional cuts
To make the directional cuts you begin with the top cut.
Aim using the chain saw's felling direction mark (1)
towards a predetermined target in an appropriate
direction (2). Try to maintain your position in the tree on
the right side and cut on the pull stroke. Ensure that you
can see the bar during the whole part of your operation.
1
32 – English
WORKING TECHNIQUES
2
Next make the bottom cut so that it finishes exactly at the
end of the top cut.
The directional cuts should run 1/4 of the diameter
through the trunk and the angle between the top cut and
bottom cut should be 60° - 70°.
The line where the two cuts meet is called the directional
cut line. This line should be perfectly horizontal and at
right angles (90°) to the chosen felling direction.
Felling cut
The felling cut is made from the opposite side of the tree
and it must be perfectly horizontal. Try to take a correct
position so you are able to cut on the pull stroke.
Make the felling cut about 0-1.5 inches (0-3 cm) above the
bottom directional cut.
Use full throttle and bring the bar and chain slowly into the
tree. Make sure the tree does not start to move in the
opposite direction to your intended felling direction. Drive
a wedge or breaking bar into the cut as soon as it is deep
enough.
Finish the felling cut parallel with the directional cut line so
that the distance between them is at least 1/10 of the