Jonsered 70C 用户手册
English
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SAFETY INSTRUCTIONS
Cutting the trunk into logs
See instructions under the heading Basic cutting technique.
Freeing a tree that has fallen badly
Freeing a ”trapped tree”
It is very dangerous to remove a trapped tree and there is high
accident risk.
accident risk.
The safest method is to use a winch.
•
Tractor-mounted
•
Portable
Cutting trees and branches that are in tension
Preparations:
Work out which side is in tension and where the point of
maximum tension is (i.e. where it would break if it was bent
even more).
maximum tension is (i.e. where it would break if it was bent
even more).
Decide which is the safest way to release the tension and
whether you are able to do it safely. In complicated situations
the only safe method is to put aside your chain saw and use
a winch.
whether you are able to do it safely. In complicated situations
the only safe method is to put aside your chain saw and use
a winch.
General advice:
Position yourself so that you will be clear of the tree or branch
when the tension is released.
when the tension is released.
Make one or more cuts at or near the point of maximum
tension. Make as many cuts of sufficient depth as necessary
to reduce the tension and make the tree or branch break at
the point of maximum tension.
tension. Make as many cuts of sufficient depth as necessary
to reduce the tension and make the tree or branch break at
the point of maximum tension.
Never cut straight through a tree or branch that is in
tension!
tension!