Felling A Tree - Oregon PowerNow CS250 Manual De Instrucciones Original

operating the saW
pruning
When pruning, make sure bystanders or
helpers are a safe distance from falling
branches and not directly in front of or
behind the saw operator. Secure any
branches that might be hazardous. Use
proper auxiliary equipment. Maintain
good footing, hold the saw firmly with
both hands, and do not overreach .
With the saw at full speed, bring the
bottom of the guide bar into contact
with the branch to cut. Apply light
pressure. For larger branches, first make
a shallow undercut on the bottom of
the branch, then finish the cut from the
top. Cutting a large branch completely
from the top could cause splintering;
a complete cut from the bottom can
cause the branch to pinch the bar .
Some saws have metal bucking spikes
mounted to the front of the saw.
Depending on user technique, bucking
spikes may reduce pruning cut quality.

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.
Use the plastic spikes on the front of the
saw to support the saw on the wood. If
equipped, set metal bucking spikes into
the wood and use as a leverage point
to increase stability when cutting large
diameter wood .
20
CHAINSAW MODEL CS 250
The chainsaw operator should keep on
the uphill side of the terrain as the tree
is likely to roll or slide downhill after it is
felled. A retreat path should be planned
and cleared as necessary before cuts are
started. The retreat path should extend
back and diagonally to the rear of the
expected line of fall (Fig. 13).
Fig. 13
retreat path options
direction
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,
staples, and wire from the tree where
felling cuts are to be made.
1 ) notching unDErcut
Make the notch 1/3 the diameter
of the tree, perpendicular to the
direction of fall. Make the lower
horizontal notching cut first. This will
help to avoid pinching of either the
saw chain or the guide bar when the
second notch is being made (Fig . 14) .
Fig. 14
notching undercut
direction
oF FaLL
notch
OREGON® PowerNow™
retreat
45°
retreat
AA 0612 - F/N 551309