GGP ITALY A 180 E Manual De Instrucciones página 31

USING THE MACHINE
• Felling back cut
– Make the felling back cut at least 50 mm higher
than the horizontal notching cut as illustrated in
Figure 16. Keep the felling back cut parallel to
the horizontal notching cut. Make the felling back
cut so enough wood is left to act as a hinge. The
hinge wood keeps the tree from twisting and
falling in the wrong direction. Do not cut through
the hinge.
– As the felling gets close to the hinge, the tree
should begin to fall. If there is any chance that the
tree may not fall in desired direction or it may
rock back and bind the saw chain, stop cutting
before the felling back cut is complete and use
wedges of wood, plastic or aluminium to open
the cut and drop the tree along the desired line
of fall.
– When the tree begins to fall remove the chain
saw from the cut, stop the motor, put the chain
saw down, then use the retreat path planned. Be
alert for overhead limbs falling and watch your
footing.
• Limbing a tree
Limbing is removing the branches from a fallen
tree. When limbing leave larger lower limbs to sup-
port the log off the ground. Remove the small limbs
in one cut as illustrated in Figure 17. Branches un-
der tension should be cut from the bottom up to
avoid binding the chain saw.
WARNING!
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.
• Bucking a log
Bucking is cutting a log into lengths. It is important
to make sure your footing is firm and your weight is
evenly distributed on both feet. When possible,
the log should be raised and supported by the use
of limbs, logs or chocks. Follow the simple direc-
tions for easy cutting.
– When the log is supported along its entire length
as illustrated in Figure 18A, it is cut from the top
(overbuck).
– When the log is supported on one end, as illus-
trated in Figure 18B, cut 1/3 the diameter from
the underside (underbuck). Then make the fin-
ished cut by overbucking to meet the first cut.
Be careful of where the
– When the log is supported on both ends, as il-
lustrated in Figure 18C, cut 1/3 the diameter
from the top (overbuck). Then make the finished
cut by underbucking the lower 2/3 to meet the
first cut.
– It is easier to saw a log using the spiked bumper
(Figure 18D).
• Dig the spiked bumper into the log and use it
as a pivot. Cut with an arched motion to make
the bar penetrate the wood.
• Repeat several times if necessary, changing
the point where you plant the spiked bumper.
– When bucking on a slope always stand on the
uphill side of the log, as illustrated in Figure 19.
When "cutting through", to maintain complete
control release the cutting pressure near the end
of the cut without relaxing your grip on the chain
saw handles. Don't let the chain contact the
ground.
After completing the cut, wait for the saw chain to
stop before you move the chain saw. Always stop
the motor before moving from tree to tree.
3. END OF OPERATIONS
When you have finished your work:
– Switch off the engine as indicated above
(Chap. 6).
– Wait for the chain to stop and allow the machine
to cool.
– Remove any traces of sawdust or oil deposits
from the chain.
– If there is excessive dirt or resin build-up, disas-
semble the chain and place it in a container with
a specific cleanser. Then rinse it with clean wa-
ter and treat it with a suitable anticorrosive spray,
before reassembling on the machine.
– Fit the bar cover before reassembling the ma-
chine.
WARNING!
before storing in any enclosure.
To reduce fire hazards, clean the machine thor-
oughly to get rid of any sawdust, branches,
leaves or excess grease, never leave contain-
ers with the cut debris inside the storage
area.
EN
Allow the engine to cool
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