Ryobi RCS-3540C Bedienungsanleitung Seite 43

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F D E I
OPERATION
NOTE: Never cut through to the notch. Always leave
a band of wood between the notch and back cut
(approximately 5 cm or 1/10 the diameter of the tree).
This is called a "hinge" or "hingewood" (E).
It controls the fall of the tree and prevents slipping or
twisting or shoot-back of the tree off the stump.
On large diameter trees, stop the back cut before it is
deep enough for the tree to either fall or settle back on
the stump. Then insert soft wooden or plastic wedges
(F) into the cut so they do not touch the chain. Drive
wedges in, little by little, to help jack the tree over.
5. As tree starts to fall, stop the chainsaw and put it down
immediately. Retreat along the cleared path, but watch
the action in case something falls your way.
WARNING
Never cut through to the notch when making a back
cut. The hinge controls the fall of the tree: this is the
section of wood between the notch and back-cut.
REMOVING BUTTRESS ROOTS (Fig. 25)
A buttress root is a large root extending from the trunk of
the tree above the ground. Remove large buttress roots
prior to felling. Make the horizontal cut (A) into the buttress
fi rst, followed by the vertical cut (B). Remove the resulting
loose section (C) from the work area. Follow the correct
tree felling procedure after you have removed the large
buttress roots. Refer to "Operation – Proper Procedure for
Tree Felling" earlier in this manual.
BUCKING (Fig. 26)
Bucking is the term used for cutting a fallen tree to the
desired log length.
Cut only one log at a time.
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Support small logs on a sawing stand or another log
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while bucking.
Keep a clear cutting area. Make sure that no objects
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can contact the guide bar nose and chain during cutting:
this can cause kick-back (A).
During bucking operations, stand on the uphill side so
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that the cut-off section of the log cannot roll over you.
Sometimes it is impossible to avoid pinching (with just
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standard cutting techniques) or diffi cult to predict which
way a log will settle when cut.
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P NL S DK N FIN GR HU CZ RU RO PL SLO HR TR EST LT
English
BUCKING WITH A WEDGE (Fig. 27)
If the wood diameter is large enough for you to insert a soft
bucking wedge (B) without touching the chain, you should
use the wedge to hold the cut open to prevent pinching.
BUCKING LOGS UNDER STRESS (Fig. 28)
(C) LOG SUPPORTED AT ONE END.
(D) LOG SUPPORTED AT BOTH ENDS.
Make the fi rst bucking cut (E) 1/3 of the way through the log
and fi nish with a 2/3 cut (F) on the opposite side.
As you cut the log, it will tend to bend. The saw can become
pinched or hung in the log if you make the fi rst cut deeper
than 1/3 of the diameter of the log.
Give special attention to logs under stress (G) to prevent
the bar and chain from pinching.
OVERBUCKING (Fig. 29)
Begin on the top side of the log with the bottom of the saw
against the log; exert light pressure downward. Note that
the saw will tend to pull away from you.
UNDERBUCKING (Fig. 30)
Begin on the under side of the log with the top of the saw
against the log; exert light pressure upward.
During underbucking, the saw will tend to push back
at you. Be prepared for this reaction and hold the saw fi rmly
to maintain control.
LIMBING AND PRUNING (Fig. 31 - 32)
Work slowly, keeping both hands on the saw with a fi rm
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grip. Maintain secure footing and balance.
Keep the tree between you and the chain while limbing.
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Cut from the side of the tree opposite the branch you
are cutting.
Do not cut from a ladder: this is extremely dangerous.
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Leave this operation for professionals.
Do not cut above chest height as a saw held higher is
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diffi cult to control against kick-back.
WARNING
Never climb into a tree to limb or prune. Do not stand
on ladders, platforms, a log, or in any position which
may cause you to lose your balance or control of
the saw.
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