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Ryobi P2507 Manuel D'utilisation page 18

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„ Allow the chain to cut for you; exert only light downward
pressure. If you force the cut, damage to the bar, chain,
or unit can result.
„ Release the switch trigger as soon as the cut is com-
pleted, allowing the chain to stop. If you run the saw
without a cutting load, unnecessary wear can occur to
the chain, bar, and unit.
„ Do not put pressure on the saw at the end of cut.
WORK AREA PRECAUTIONS
See Figure 13.
„ Cut only wood or materials made from wood, no sheet metal,
no plastics, no masonry, no non-wood building materials.
„ Never allow children to operate the saw. Allow no person
to use this chain saw who has not read this Operator's
Manual or received adequate instructions for the safe and
proper use of this chain saw.
„ Keep everyone - helpers, bystanders, children, and ani-
mals - a safe distance from the cutting area. During fell-
ing operations, the safe distance should be a least twice
the height of the largest trees in the felling area. During
bucking operations, keep a minimum distance of 15 feet
between workers.
„ Always cut with both feet on solid ground to prevent be-
ing pulled off balance.
„ Do not cut above chest height, as a saw held higher is
difficult to control against kickback forces.
„ Do not fell trees near electrical wires or buildings. Leave
this operation for professionals.
„ Cut only when visibility and light are adequate for you
to see clearly.
FELLING TREES
See Figures 13 - 16.
HAZARDOUS CONDITIONS
WARNING:
Do not fell trees during periods of high wind or heavy
precipitation. Wait until the hazardous weather has ended.
WARNING:
Closely check for broken or dead branches, which could
fall while cutting and do not cut near buildings or electrical
wires if you do not know the direction of tree fall. Do not
cut at night or during bad weather conditions, such as
rain, snow, or strong winds, which can reduce visibility
and control of the chain saw. If the tree you are felling
makes contact with any utility line, you should discontinue
use of the chain saw and immediately notify the utility
company. Failure to follow these instructions could result
in death or serious personal injury.
OPERATION
When felling a tree, it is important that you follow these
warnings and instructions to prevent possible serious injury.
„ Do not cut down trees having an extreme lean or large
trees with rotten limbs, loose bark, or hollow trunks. Have
these trees pushed or dragged down with heavy equip-
ment, then cut them up.
„ Do not cut trees near electrical wires or buildings.
„ Check the tree for damaged or dead branches that could
fall and hit you during felling.
„ Periodically glance at the top of the tree during the
backcut to assure the tree is going to fall in the desired
direction.
„ If the tree starts to fall in the wrong direction, or if the saw
gets caught or hung up during the fall, leave the saw and
save yourself!
„ 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 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 notified immediately.
„ Before any cuts are started, pick your escape route (or
routes in case the intended route is blocked); clear the im-
mediate area around the tree and make sure there are no
obstructions in your planned path of retreat. Clear paths
of safe retreat should extend back and diagonally (45°) to
the rear of the planned line of fall. When the tree begins
to fall, you should retreat away from the direction of fall
along a retreat path and at least 20 feet away from the
trunk in case it kicks back over the stump. See Figure 13.
„ Before felling is started, consider the force and direction
of the wind, the lean and balance of the tree, and the lo-
cation of large limbs. These things influence the direction
in which the tree will fall. Do not try to fell a tree along a
line different from its natural line of fall.
„ 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.
„ Remove dirt, stones, loose bark, nails, staples, and wire
from the tree where felling cuts are to be made.
„ Notched Undercut. Cut a notch about 1/3 the diameter
of the tree, perpendicular to the direction of fall. Make the
cuts of the notch so they intersect at a right angle to the
line of fall. This notch should be cleaned out to leave a
straight line. To keep the weight of the wood off the saw,
always make the lower cut of the notch before the upper
cut. See Figure 14.
„ Felling Backcut. The backcut is always made level and
horizontal, and at a minimum of 2 in. above the horizontal
cut of the notch. See Figures 14 - 15.
12 - English

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