HUSQVARNA 257 Instruction Manual

SAFETY INSTRUCTIONS
We recommend that you use
4 Freeing a tree that has fallen badly = high
a bar that is longer than the
diameter of the tree, so thataccident risk
you can make the FELLING
CUT and DIRECTIONAL CUT
with single cutting stokes.A Freeing a OTrapped tree�
(See �Technical data� to findThe safest method is to use a winch.
out which lengths of bar areA Tractor-mountedB Portable
recommended for your saw).
There are methods for felling
trees with a diameter larger
than the bar length. However
these methods involve a much
greater risk that the kickback
zone of the bar will come into
contact with the tree.
B Cutting trees and branches that are in tension
Preparations:
UNLESS YOU HAVE SPECIAL TRAINING WEa) Work out which way the tree or branch will move if released
ADVISE YOU NOT TO FELL TREES WITH Aand where the natural OBREAKING POINT� is (i.e. the place
DIAMETER LARGER THAN THE BAR LENGTHit would break if it was bent even more).
OF YOUR SAW!
E Limbing
MOST KICKBACK ACCIDENTS HAPPEN
DURING LIMBING!PAY CLOSE ATTENTION
TO THE POSITION OF THE KICKBACK ZONE
OF THE BAR WHEN YOU ARE LIMBING
BRANCHES THAT ARE IN TENSION!
Make sure there are nob) Decide which is the SAFEST way to release the tension
obstacles in your way. Workand whether YOU are able to do it safely. In complicated
on the left side of the trunk.situations the only safe method is to put aside your chain
Work close to the saw forsaw and use a winch.
maximum control. If possible,General advice:
let the weight of the saw rest
on the trunk.
a) Position yourself so that
you will be clear of the
Keep the tree between youtree or branch when it
springs free.
and the saw as you move
along the trunk.
b) Make one or more cuts at
or near the BREAKING
POINT. Make as many
cuts of sufficient depth as
F Cutting the trunk into logsnecessary to reduce the
See chapter �General working instructions� point 2 �Basictension and make the tree
cutting technique�.or branch break at the
BREAKING POINT.
Never cut straight
through a tree or branch
that is IS in tension!
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