Husqvarna 137 Manual De Instrucciones página 11

Grip the rear handle with your right hand and
the front handle with your left hand, Hold the
chain saw approximately 14" (35 cm) above
a stump or other wooden surface, Release
your grip on the front handle and use the
weight of the saw to let the tip of the guide bar
fall forward and contact the stump. When the
tip of the bar hits the stump, the brake should
activate.
IMPORTANT POINTS
• Check chain tension before first use and af-
ter 1 minute of operation, See CHAIN TEN-
SION in the ASSEMBLY section.
• Cut wood only. Do not cut metal, plastics,
masonry, non-wood building materials, etc.
• Stop the saw if the chain strikes a foreign ob-
ject, Inspect the saw and repair or replace
parts as necessary,
• Keep the chain out of dirt and sand. Even a
small amount of dirt will quickly dull a chain
and thus increase the possibility of kickback.
• Practice cutting a few small logs using the
following techniques to get the '?eer' of using
your saw before you begin a major sawing
operation,
• Squeeze the throttle trigger and allow the
engine to reach full speed before cutting,
• Begin cutting with the saw frame against
the log.
• Keep the engine at full speed the entire
time you are cutting.
• Allow the chain to cut for you, Exert only
light downward pressure. Ifyou forcethe
cut, damage to the bar, chain, or engine
can result.
• Release the throttle trigger as soon as the
cut is completed, allowing the engine to
idle. If you run the saw at full throttle with-
out a cutting load, unnecessary wear can
occur to the chain, bar, and engine. It is
recommended that the engine not
be operated for longer than 30 sec-
onds at full throttle.
• To avoid losing control when cut is com-
plete, do not put pressure on saw at end
of cut.
• Stop the engine before setting the saw down
after cutting.
TREE FELLING TECHNIQUES
WARNING: Felling a tree requires
chain saw skills and experience, Inexperi-
enced users should not fell trees. Do not at-
tempt any task that makes you feel uncomfort-
able or unsure,
&WARNING:
Check for broken or
dead branches which can fall while cutting
causing serious injury. Do not cut near build-
ings or electrical wires if you do not know the
direction of tree fall, nor cut at night since you
will not be ale to see well, nor during bad
weather such as rain, snow, or strong winds,
etc, If the tree makes contact with any utility
line, the utility company should be notified im-
mediately.
• Carefully plan your sawing operation in ad-
vance.
• Clear the work area, You need a clear area
all around the tree so you can have secure
footing.
• 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.
• Study the natural conditions that can cause
the tree to fall in a particular direction,
Natural conditions that can cause a tree to
fall in a particular direction include:
• The wind direction and speed.
• The lean of the tree. The lean of a tree
might not be apparent due to uneven or
sloping terrain, Use a plumb or level to de-
termine the direction of tree lean.
• Weight and branches on one side.
• Surrounding trees and obstacles.
Look for decay and rot, If thetrunk is rotted,
it can snap and fall toward the operator.
Check for broken or dead branches which
can fall on you while cutting.
Make sure there is enough room for the tree to
fail, Maintain a distance of 2-1/2 tree lengths
from the nearest person or other objects. En-
gine noise can drown out a warning call.
Remove dirt, stones, loose bark, nails, sta-
ples, and wire from the tree where cuts are to
be made. Plan a clear retreat path to the rear
and diagonal to the line of fall.
_t,,_e.. Plan a clear retreat path
(}"_- Direction of Fall
45 ° /
"_/,e¢
FELLING LARGE TREES
(6 inches (15 ore) in diameter or larger)
The notch method is used to fell large trees.
A notch is cut on the side of the tree in the de-
sired direction of fail. After a felling cut is
made on the opposite side of tree, the tree
will tend to fall into the notch.
NOTE:
If the tree has large buttress roots,
remove them before making the notch, Ifus-
ing saw to remove buttress roots, keep saw
chain from contacting ground to prevent dull-
ing of the chain.
NOTCH CUT AND FELLING THE
TREE
• Make notch cut by cutting the top of the
notch first. Cut through 1/3 of the diameter
of the tree. Next complete the notch by cut-
ting the bottom of the notch, See illustra-
tion. Once the notch is cut, remove the
notch of wood from the tree.
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