Idiomas disponibles
Idiomas disponibles
Notching undercut and felling back cut
CAUTION:
Do not cut the hinge under any
circumstances. The tree may fall unexpectedly.
NOTICE:
Use plastic or aluminum wedges to
keep the back cut open. Do not use iron wedges.
► Fig.29: 1. 50 mm 2. Felling back cut 3. Hinge
4. Notch 5. Direction of fall
Make the notch 1/3 the diameter of the tree, perpen-
dicular to the direction of falls as illustrated. 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.
Make the felling back cut at least 50 mm higher than the
horizontal notching cut as illustrated. 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 and falling
in the wrong direction. Do not cut through the hinge.
As the felling gets close to the hinge, the tree should begin
to fall. If there is any chance that the tree may not fall in
desired direction or it may rock back and bind the saw
chain, stop cutting before the felling back cut is complete
and use wedges of wood, plastic or aluminium to open the
cut and drop the tree along the desired line of fall.
When the tree begins to fall, remove the chain saw
from the cut, stop the motor, put the chain saw down,
then use the retreat path planned. Be alert for overhead
limbs falling and watch your footing.
Limbing a tree
CAUTION:
Limbing may only be performed by
trained persons. A hazard is presented by the risk
of kickback.
Limbing is removing the branches from a fallen tree.
When limbing leave larger lower limbs to support the
log off the ground. Remove the small limbs in one cut as
illustrated. Branches under tension should be cut from
the bottom up to avoid binding the chain saw.
► Fig.30: 1. Limb cut
Cross-cutting/bucking a log
Cross-cutting/bucking is cutting a log into lengths. It is
important to make sure your footing is firm and your weight
is evenly distributed on both feet. When possible, the log
should be raised and supported by the use of limbs, logs or
chocks. Follow the simple directions for easy cutting.
When the log is supported along its entire length as
illustrated, it is cut from the top (overbuck).
► Fig.31
When the log is supported on one end, as illustrated,
cut 1/3 the diameter from the underside (underbuck).
Then make the finished cut by overbucking to meet the
first cut.
► Fig.32: 1. First cut 2. Second cut
When the log is supported on both ends, as illustrated,
cut 1/3 the diameter from the top (overbuck). Then
make the finished cut by underbucking the lower 2/3 to
meet the first cut.
► Fig.33: 1. First cut 2. Second cut
When cross-cutting/bucking on a slope always stand on
the uphill side of the log, as illustrated. When "cutting
through", to maintain complete control, release the
cutting pressure near the end of the cut without relaxing
your grip on the chain saw handles. Don't let the chain
contact the ground. After completing the cut, wait for
the saw chain to stop before you move the chain saw.
Always stop the motor before moving from tree to tree.
► Fig.34
Parallel-to-grain cut
CAUTION:
Parallel-to-grain cut may only be
performed by trained persons. The possibility of
kickback presents a risk of injury.
Perform the parallel-to-grain cut at as shallow an angle
as possible.
► Fig.35
Carrying tool
Before carrying the tool, always apply the chain brake
and remove the battery cartridge from the tool. Then
attach the guide bar cover. Also cover the battery car-
tridge with the battery cover.
► Fig.36: 1. Guide bar cover 2. Battery cover
MAINTENANCE
CAUTION:
Always be sure that the tool is
switched off and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
CAUTION:
Always wear gloves when perform-
ing any inspection or maintenance.
NOTICE:
Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
Sharpening the saw chain
Sharpen the saw chain when:
•
Mealy sawdust is produced when damp wood is
cut;
•
The chain penetrates the wood with difficulty, even
when heavy pressure is applied;
•
The cutting edge is obviously damaged;
•
The saw pulls to the left or right in the wood.
(caused by uneven sharpening of the saw chain or
damage to one side only)
Sharpen the saw chain frequently but a little each time.
Two or three strokes with a file are usually sufficient for
routine resharpening. When the saw chain has been
resharpened several times, have it sharpened in our
authorized service center.
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