Stiga CS 20 Li B Manual De Instrucciones página 172

and falling in the wrong direction. Do not cut
through the hinge.
3. Reduce the thickness of this hinge without
pulling out the bar, until the tree falls.
4. If there is any risk of the tree not falling in
the desired direction, or that it might lose its
balance moving backwards and bending the
toothed chain, stop cutting before completing
the felling back cut and use some wooden,
plastic or aluminium wedges (Fig. 23. D) to
open the cut. Force the tree to fall along the
desired line by hitting the wedges with a
sledge hammer.
5. When the tree starts to fall, it is necessary to
withdraw the machine from the cut, switch it
off (par. 6.6), lie it on the ground and take the
foreseen exit route. Beware of falling
branches and pay attention where you
put your feet.
6.5.3 Limbing tree branches
Limbing means removing the branches from a
felled tree.
Be careful of where the branches are
lying on the ground, the risk of them being
under tension, the direction the branch may
go during cutting and the risk of the tree
being unstable after the branch has been cut.
When limbing, it is necessary to leave the lower,
larger branches to support the trunk on the ground.
Remove the small branches with a single cut (Fig.
24.A).
It is recommended to cut the tensioned branches
working from the bottom upwards to prevent the
chainsaw from bending (Fig. 24.B).
6.5.4 Bucking the trunk
Bucking means sawing a tree trunk into logs.
It is essential to make sure your feet are positioned
firmly on the ground, and your weight is distributed
equally on both feet. If possible, it is recommended
to raise and support the trunk using branches,
logs or blocks of wood.
It is easier to saw a log using the spiked bumper
(Fig. 1H):
1. plant the spiked bumper into the log and use it
as a pivot. Cut with an arched motion to make
the bar penetrate the wood (Fig. 25);
2. repeat several times if necessary, changing
the point where you plant the spiked bumper.
• Trunk lying on the ground
When the entire trunk is lying on the ground, it
is bucked from the top down (overbucking) (Fig.
26.A).
– Cut up to half the diameter, roll the log over
and finish sawing on the other side.
• Trunk resting on one end only
When the trunk is resting on one end only:
– saw through 1/3 of the diameter from the
bottom up (underbucking) (Fig. 27.A);
– then perform the final cut, overbucking to
reach the first cut (Fig. 27.B).
• Trunk resting on both ends
When the trunk is resting on both ends:
– saw through 1/3 of the diameter from the top
down (overbucking) (Fig. 28.A);
– then perform the final cut, underbucking the
lower 2/3 to reach the first cut (Fig. 28.B).
• Sloping trunk
Always stand uphill when bucking a sloping trunk
(Fig. 29).
During the operation, to maintain control when
the cut is almost complete, reduce the bucking
pressure without removing removing your hands
from the machine hand grips. Take all necessary
precautions to prevent the machine from coming
into contact with the ground.
6.6 STOP
To stop the machine:
1. Release the throttle trigger lever (Fig. 14.A).
After releasing the throttle control it
takes a few seconds for the toothed chain to
stop.
Always stop the machine when moving between
work areas.
Do not keep your finger on the safety
button when moving the machine to avoid
accidentally enabling the machine.
6.7 AFTER USE
1. If the machine isn't in charge, remove the
batteries from its housing;
2. Mount the protection bar cover (Fig. 1.J);
3. allow the motor to cool before storing in an
enclosed space;
4. loosen the knob to reduce chain tension (par.
6.1.3);
5. carefully remove any dust and debris and
remove all traces of sawdust or oil deposits
from the chain (par. 7.6);
EN - 12