17 ENGLISH
►
Fig.24
Hold the chain saw away from the tree. Start it and wait
until lubrication on saw chain is adequate.
Bring the lower guide into contact with the branch to
be cut before switching on. Cutting without bringing the
lower guide into contact with the branch may cause the
guide bar to wobble, resulting in injury to operator.
Saw the wood to be cut by just moving it down.
WORKING WITH THE CHAIN SAW
The first time user should, as a minimum practice, do
cutting logs on a saw-horse or cradle.
Pruning trees
►
Fig.25:
1.
Lower guide
CAUTION:
•
Keep all parts of the body away from the saw
chain when the motor is operating.
•
Hold the chain saw firmly with both hands when
the motor is running.
•
Do not overreach. Keep proper footing and
balance at all times.
Bring the lower guide into contact with the branch to
be cut before switching on. Cutting without bringing the
lower guide into contact with the branch may cause the
guide bar to wobble, resulting in injury to operator.
►
Fig.26
When cutting thick branches, first make a shallow
undercut and then make the finish cut from the top.
►
Fig.27
If you try to cut off thick branches from the bottom, the
branch may close in and pinch the saw chain in the cut.
If you try to cut off thick branches from the top without a
shallow undercut, the branch may splinter.
►
Fig.28
If you cannot cut the timber right through with a single stroke:
Apply light pressure to the handle and continue sawing and
draw the chain saw back a little; then apply the spike a little
lower and finish the cut by raising the handle.
Bucking
►
Fig.29
For bucking cuts, rest the serrated rail shown in the
figure on the wood to be cut.
With the saw chain running, saw into the wood, using
the top handle to raise the saw and the front one to
guide it. Use the serrated rail as a pivot.
Continue the cut by applying slight pressure to the front
handle, easing the saw back slightly. Move the serrated rail
further down the timber and raise the front handle again.
When making several cuts, switch the chain saw off
between cuts.
►
Fig.30
CAUTION:
•
If the upper edge of the bar is used for cutting,
the chain saw may be deflected in your direction
if the chain becomes trapped. For this reason,
cut with the lower edge, so that the saw will be
deflected away from your body.
►
Fig.31
Cut wood under tension on the pressure side (A) first.
Then make the final cut on the tension side (B). This
prevents the bar from becoming trapped.
Limbing
CAUTION:
•
Limbing may only be performed by trained
persons. A hazard is presented by the risk of
kick-back.
When limbing, support the chain saw on the trunk if
possible. Do not cut with the tip of the bar, as this pres-
ents a risk of kickback.
Pay particular attention to branches under tension. Do
not cut unsupported branches from below.
Do not stand on the felled trunk when limbing.
Burrowing and parallel-to-grain cuts
CAUTION:
•
Burrowing and parallel-to-grain cuts may only
be carried out by persons with special training.
The possibility of kickback presents a risk of
injury.
►
Fig.32
Perform parallel-to-grain cuts at as shallow an angle as
possible. Carry out the cut as carefully as possible, as
the serrated rail cannot be used.
Felling
CAUTION:
•
Felling work may only be performed by trained
persons. The work is hazardous.
Observe local regulations if you wish to fell a tree.
►
Fig.33:
1.
Felling area
— Before starting felling work, ensure that:
(1) Only persons involved in the felling operation
are in the vicinity;
(2) Any person involved has an unhindered path
of retreat through a range of approximately
45 ° either side of the felling axis. Consider
the additional risk of tripping over electrical
cables;
(3) The base of the trunk is free of foreign
objects, roots and ranches;
(4) No persons or objects are present over a
distance of 2 1/2 tree lengths in the direction
in which the tree will fall.
— Consider the following with respect to each tree:
•
Direction of lean;
•
Loose or dry branches;
•
Height of the tree;
•
Natural overhang;
•
Whether or not the tree is rotten.
— Consider the wind speed and direction. Do not
carry out felling work if the wind is gusting strongly.
— Trimming of root swellings: Begin with the largest
swellings. Make the vertical cut first, then the
horizontal cut.
Содержание AS-3625
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