Husqvarna 340 EPA II 用户手册

English

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115 09 86-95 Rev.2 2007-11-27

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Is there a risk of kickback?

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Do the conditions and surrounding terrain affect how 
safely you can stand and move about?

Two factors decide whether the chain will jam or the object 
that you are cutting will split: the first is how the object is 
supported before and after cutting, and the second is 
whether it is in tension.

In most cases you can avoid these problems by cutting in 
two stages; from the top and from the bottom. You need to 
support the object so that it will not trap the chain or split 
during cutting.

The following instructions describe how to handle the 
common situations you are likely to encounter when using 
a chain saw.

When limbing thick branches you should use the same 
approach as for cutting.

Cut difficult branches piece by piece.

If you have a pile of logs, each log you attempt to cut 
should be removed from the pile, placed on a saw horse 
or runners and cut individually.

Remove the cut pieces from the cutting area. By leaving 
them in the cutting area, you increase the risk for 
inadvertently getting a kickback, as well as increasing the 
risk of losing your balance while working.

The log is lying on the ground. There is little risk of the 
chain jamming or the object splitting. However there is a 
risk that the chain will touch the ground when you finish 
the cut.

Cut all the way through the log from above. Avoid letting 
the chain touch the ground as you finish the cut. Maintain 
full throttle but be prepared for what might happen.

If it is possible (can you turn the log?) stop cutting about 
2/3 of the way through the log.

Turn the log and finish the cut from the opposite side.

The log is supported at one end. There is a high risk 
that it will split.

IMPORTANT! If the chain jams in the cut: stop the 
engine! Don’t try to pull the chain saw free. If you do you 
may be injured by the chain when the chain saw 
suddenly breaks free. Use a lever to open up the cut and 
free the chain saw.