Cutting; Felling A Tree - Oregon CS250 Manuel D'instruction

OREGON® CORDLESS TOOL SYSTEM
CHAIN SAW MODEL CS250

CUTTING

BASIC CUTTING
WARNING: ALWAYS BE SURE OF
FOOTING AND HOLD THE CHAIN
SAW FIRMLY WITH BOTH HANDS
WHILE THE MOTOR IS RUNNING.
Assume the proper cutting grip and
stance in front of the wood with the
saw off Press the trigger lock-out and
squeeze the trigger switch Let the chain
reach full speed before beginning the
cut
Begin cutting by lightly pressing the
guide bar against the wood Use only
light pressure, letting the saw do the
work
Maintain a steady speed throughout the
cut, releasing pressure just before the
end of the cut
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
AD 0213 - F/N 551309
OPERATING THE SAW

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
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 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 16)
FIG. 16 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
RETREAT
45°
RETREAT
21