FERREX CHAINSAW 4-STROKE, Руководство пользователя

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Felling trees - only with relevant training
m
CAUTION
Watch out for broken or dead branches which may fall down during sawing and
which could cause severe injuries. Do not saw close to buildings or power lines if you
do not know in which direction the felled tree will fall. Do not work at night because
you can see less well, or during rain, snow and storms because the direction in which
the tree will fall cannot be anticipated.
•
Plan your work with the chainsaw in advance.
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The working environment around the tree should be cleared so you have secure
footing.
•
The machine operator should always be positioned at a higher level in the work-
ing area because the tree will probably roll or slide down after felling.
The following conditions can influence the tree‘s falling direction:
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Wind direction and speed
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Leaning of the tree - The leaning direction cannot always be recognised
because of uneven or sloping ground. Determine the leaning direction of the
tree using a plumb line or a level.
•
Branches growing (and therefore weight) only on one side
•
Surrounding trees or obstacles
Look out for destroyed or decayed parts of the tree. If the trunk is decayed, it can
suddenly break and fall on you. Make sure there is sufficient space for the falling tree.
Keep a distance of 2½ tree lengths to the next person or other objects. The sound of
the motor can drown out warning cries.
Remove dirt, stones, loose bark, nails, brackets and wire from the sawing area.
m Ensure you have a free escape route (Fig. 16)
Position 1: Escape route
Position 2: Falling direction of the tree
Felling of large trees (from 15cm diameter) - only with relevant training
The undercutting method is used for felling large trees. For this, a wedge is cut out
from the side of the tree according to the required falling direction. After the drop-
ping cut has been made on the other side of the tree, it will fall in the direction of the
wedge cut.
Operating Instructions