Tabla de contenido
Idiomas disponibles
Idiomas disponibles
saw as a lever for lifting, moving or splitting objects. Do not lock it over fixed stands.
It is not necessary to force the saw into the cut. Apply only light pressure while running the
engine at full throttle.
Racing the engine with the chain seized in a cutaway can damage the clutch system. When the
saw chain is caught in the cut, do not attempt to pull it out by force, but use a wedge or a lever
to open the cut.
When cutting trees and thick branches, the teeth of the spiked bumper can be tied to the wood,
prevent slippery, and easy cutting under the focal point.
Safe chainsaw operation
BB.101 Felling a tree
When bucking and felling operations are being performed by two or more persons at the same
time, the felling operations 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 company should be notified 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 as
illustrated in Figure BB.101.
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.
BB.102 Notching undercut
Make the notch 1/3 the diameter of the tree, perpendicular to the direction of falls as illustrated
in Figure BB.102. Make the lower horizontal notching cut first. This will help to avoid pinching
either the saw chain or the guide bar when the second notch is being made.
BB.103 Felling back cut
Make the felling back cut at least 50 mm higher than the horizontal notching cut as illustrated in
Figure BB.102. Keep the felling back cut parallel to the horizontal notching cut. Make the felling
back cut so enough wood is left to act as a hinge. The hinge wood keeps the tree from twisting
50
Tabla de contenido
