Jonsered 2033T Operator's Manual page 22

2 The log is supported at one
end. There is a high risk
that it will split.
A Start by cutting from
below (about 1/3 of the
way through).
B Finish by cutting from
above so that the two
cuts meet.
3 The log is supported at both
ends. There is a high risk
that the chain will jam.
A Start by cutting from
above (about 1/3 of the
way through).
B Finish by cutting from
below so that the two
cuts meet.
Limbing
When limbing thick branches
you should use the same
approach as for cutting.
Cut difficult branches piece by
piece.
22
– English
SAFETY INSTRUCTIONS
3 Felling technique for tree tops
!
It takes a lot of experience to fell a tree.
Inexperienced users of chain saws should not
fell trees. NEVER ATTEMPT A TASK YOU ARE
UNSURE OF.
A Safe distance
During tree maintenance work above ground level, the working
area should always be "secured" and marked out with signs,
tape or similar.
The safe distance between the tree that is to be felled and the
nearest workplace is 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.
B Felling direction
The aim is to fell the tree in
the best possible position for
subsequent limbing and
cross-cutting. You want it to
fall on an area of ground
where you can move about
safely.
The main point to avoid is
letting the tree fall onto and
become entangled in another
tree. It can be both difficult
and dangerous to remove a
tree from this situation (see
point 4 in this section).
Once you have decided which
way you want the tree to fall,
you must judge which way the
tree would fall naturally.
Several factors affect this:
• Leaning angle (if any)
• Bend
• Wind direction
• Arrangement of branches
• Presence and weight of
snow
On taking these factors into account you may find that you are
forced to let the tree 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 that the
tree has no damaged or dead branches that might break off and
hit you during felling.
!
During critical felling operations, hearing
protectors should be lifted immediately when
sawing is completed so that sounds and
warning signals can be heard.