Husqvarna 315 用户手册

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Most accidents caused by kickbacks take place in connection with limbing. Make certain your footing is 
secure and that there are no i objects nearby which may trip you or make you lose your balance. If you 
are not careful, the kickback danger zone could make contact with a branch, a nearby tree or some other 
object which could cause a kickback.

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Never use a chain saw to cut above shoulder height, and do not cut with the guide bar nose.

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Maintain full speed while cutting.

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Take extreme care when cutting with the top chain (on the underside 
of a log). The force of the chain action pushes the saw backwards, 
and if the operator does not maintain firm control, the kickback danger 
zone may move far enough back into the kerf to produce a kickback.
Cutting with the bottom chain (on the top side of the log) pulls the saw 
forward. This presses the power head firmly against the tree, providing 
a steady support and giving the operator added control over the saw 
and consequently over the kickback danger zone.

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Follow the maintenance and sharpening instructions for the chain 
and guide bar. When replacing chains and guide bars, use only 
combinations recommended by us. See «Technical Specifications».

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The smaller the bar nose radius, the smaller the kickback danger zone 
and thus the kickback tendency.

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By using low-kickback cutting equipment and keeping the cutters 
properly sharpened, the strength of a kickback can be greatly reduced.

Your chain saw is equipped with a chain brake designed to stop the 
chain instantaneously in the event of a kickback. A chain brake can 
reduce the risk of accident, but only the operator can prevent accidents
from happening.

Be extremely careful when operating a chain saw and do not allow the
kickback danger zone to make contact with anything.