Felling Back Cut (The Final Cut In A Tree Felling Operation, Made On The Opposite Side Of The Tree From The Notching Undercut) - Ryobi RCS36 Bedienungsanleitung

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WARNING
Never operate the chain saw without suffi cient chain
lubrication as this might damage the saw and is a threat
to safety. Check the chain lubricant level before each
use!
In order to prevent kickback, please follow these safety
instructions:
 Never cut with the tip of the guide bar! Be careful when
continuing from previous cuts.
 Always start cutting only when the chain saw is already
running.
 Make sure that the saw chain is always properly
sharpened.
 Never cut through more than one branch at a time!
When lopping off branches, be careful not to touch any
other branches.
 When cross-cutting, pay attention to trunks standing
very close to each other. If possible, use a sawing trestle.
HOLDING THE CHAIN SAW
See fi gure 8
Always hold the chain saw with your right hand at the
rear handle and your left hand at the front handle.
Grip both handles with the thumbs and fi ngers encircling
the handles. Ensure that your left hand is holding the front
handle so that your thumb is underneath.
STARTING OPERATION
 Before starting for operation, you should install the
battery pack in the machine.
 Start the machine: Pull the Safety lock-off button (item
4), and then pressure the switch trigger (item 5).
STOPPING OPERATION
 Release the power switch trigger (item 5) to stop the
chain saw.
USING THE CHAIN SAW
Always be sure of your footing and hold the chain saw
fi rmly with both hands while the motor is running.
BASIC FELLING, LIMBING, AND CROSS-CUTTING
TECHNIQUES
See fi gure 9
FELLING A TREE
When bucking and felling operations are being performed
by two or more persons at the same time, the felling
operation should be separated from the bucking operation
by a distance of at least twice the height of the tree being
felled. Trees should not be felled in a manner that would
RCS36-23lgs manual.indd 18 RCS36-23lgs manual.indd 18
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English
endanger any person, strike any utility line or cause any
property damage. If the tree does make contact with
any utility line, the utility company should be notifi ed
immediately.
The chain saw operator should keep on the uphill side of
the terrain as the tree is likely to roll or slide downhill after
it is felled.
An escape path should be planned and cleared as
necessary before cuts are started. The escape path
should extend back and diagonally to the rear of the
expected line of fall.
Before felling is started, consider the natural lean of the
tree, the location of larger branches and the wind direction
to judge which way the tree will fall.
Remove dirt, stones, loose bark, nails, and staples from
the tree.
NOTCHING UNDERCUT (A NOTCH CUT IN A TREE TO
DIRECT THE FALL)
See Figure 10
Make the notch 1/3 in diameter of the tree, perpendicular
to the direction of falls. Make the lower horizontal notching
cut fi rst, this will help to avoid pinching of either the saw
chain or the guide bar when the second notch is being
made.
FELLING BACK CUT (THE FINAL CUT IN A TREE
FELLING OPERATION, MADE ON THE OPPOSITE SIDE
OF THE TREE FROM THE NOTCHING UNDERCUT)
See Figure 10
Make the felling back cut at least 50mm higher than the
horizontal notching cut. Keep the felling back cut parallel
to the horizontal notching cut. Make the felling back cut
so as to leave enough wood 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 cut
gets close to the hinge, the tree should begin to fall. If
there is any chance that the tree may not fall in the 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, and then use the retreat
path as planned. Be alert of overhead limbs falling and
watch your footing.
LIMBING A TREE
See fi gure 11
Limbing is removing the branches from a fallen tree. When
limbing, leave the larger lower limbs to support the log off
the ground. Remove the small limbs in one cut. Branches
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