Husqvarna T435 ユーザーズマニュアル

ページ / 44
WORKING TECHNIQUES
26 – English
Limbing
When limbing thick branches you should use the same 
approach as for cutting.
Cut difficult branches piece by piece.
Felling technique for tree tops
Safe distance
During tree maintenance work above ground level, the 
working area must always be secured and marked out 
with signs, tape or the like. The safe distance between the 
top of the tree that is to be felled and the nearest 
workplace must be at least 2 1/2 times the height of the 
tree. Make sure that no-one else is in this risk zone before 
or during felling.
Felling direction
The aim is to fell the tree in a position where you can limb 
and cross-cut the log as easily as possible. You want it to 
fall in a location where you can stand and move about 
safely. The main thing to avoid is that the falling tree top 
should get jammed in another tree. Taking down a 
”jammed” tree top is very dangerous (see point 4 in this 
section).
Once you have decided which way you want the top of the 
tree to fall you must assess which way the top of the tree 
would fall naturally.
Several factors affect this:
Lean of the tree
Bend
Wind direction
Arrangement of branches
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.
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. Try 
to take your position in the tree on the right side and cut 
on the pull stroke.
Next make the bottom cut so that it finishes exactly at the 
end of the top cut.
!
WARNING! It takes a lot of experience to 
fell a tree. Inexperienced users of chain 
saws should not fell trees. Do not 
attempt any task that you feel unsure of!
!
WARNING! During critical felling 
operations, hearing protectors should be 
lifted immediately when sawing is 
completed so that sounds and warning 
signals can be heard.