Chain Saw
WG303E
16
CUTTING WOOD UNDER TENSION (See fig. l)
WARNING: When cutting a limb that is under
tension, use extreme caution. Be alert for
wood springing back. When wood tension is
released, limb could spring back and strike
operator causing severe injury or death.
When sawing logs supported on both ends, start the
cut from above (Y) about 1/3 of the diameter into the
log and then finish the cut (Z) from below, in order to
avoid contact of the chain saw with the ground. When
sawing logs supported on only one end, start the cut
from below (Y) about 1/3 of the diameter into the log
and finish the cut from above (Z) in order to avoid log
splitting or jamming of the chain saw.
fEllING TREES (See fig. M)
WARNING: Always wear a hard hat to
protect head against falling branches. The
chain saw can only be used to fell trees smaller
in diameter than the length of the chain bar.
Safe felling Area: Secure work area. Ensure
no persons or animals are in the vicinity of the
falling tree.
Never attempt to free a jammed saw with the
motor running. Use wedges to free chain and
chain bar.
When any other cutting operation and a felling
operation are being performed by two or more persons
at the same time, the felling operation should be
separated from the cutting 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.
Escape Route:
An escape path should be planned
and cleared before any cuts are started. Make sure to
remove any low hanging limbs up to shoulder height,
as well as all undergrowth around the base of the tree
that may prove to be an obstacle during escape. Your
escape paths should be roughly 135 degrees away from
the intended felling direction.
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.
Z
Y
kg
Z
Y
L
fall
W
Y
Z
X
50mm
50mm
Direction of fall
Escape
route
Escape
route
Notching
UnderCut
Felling
backcut
M
